[Federal Register Volume 67, Number 197 (Thursday, October 10, 2002)]
[Rules and Regulations]
[Pages 63050-63054]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 02-25707]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 25
[Docket No. NM217; Special Conditions No. 25-209-SC]
Special Conditions: Boeing Commercial Airplane Group, Boeing
Model 747-400 Series Airplane; Forward Lower Lobe (Service/Cargo)
Compartment
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final special conditions.
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SUMMARY: These special conditions are issued for the Boeing Model 747-
400 series airplane. This airplane, as modified by the Boeing
Commercial Airplane Group, Wichita, Kansas, will have novel or unusual
design features associated with the installation of a forward lower
lobe compartment that will have two functions: that of a service
compartment and that of a class C cargo compartment. The applicable
airworthiness regulations do not contain adequate or appropriate safety
standards for this design feature. These special conditions contain the
additional safety standards that the Administrator considers necessary
to establish a level of safety equivalent to that established by the
existing airworthiness standards.
EFFECTIVE DATE: September 30, 2002.
FOR FURTHER INFORMATION CONTACT: Mark Quam, FAA, Standardization
Branch, ANM-113, Transport Airplane Directorate, Aircraft Certification
Service, 1601 Lind Avenue SW., Renton, Washington, 98055-4056;
telephone (425) 227-2145; facsimile (425) 227-1149.
SUPPLEMENTARY INFORMATION:
Background
On January 3, 2001, Boeing Commercial Airplane Group (BCAG)--
Wichita Division Designated Alteration Station (DAS) applied for a
supplemental type certificate for the installation, in a Boeing Model
747-400 series airplane, of a forward lower lobe compartment that
combines two functions: that of a service compartment and that of a
class C cargo compartment. The Boeing Model 747-400 series airplane,
currently approved under Type Certificate A20WE, is a large transport
category airplane with upper and main passenger decks. The main deck is
limited to 550 passengers or less and the upper deck is limited to 110
passengers or less, depending on the interior configuration. Cargo
compartments are installed below the main deck. The airplane is driven
by four high-bypass turbojet engines capable of a static thrust in
excess of 43,000 pounds.
The 747-400 configuration proposed for certification is an interim,
but certifiable, configuration. The final interior will be installed by
another modifier at a later date. Boeing proposes to certificate the
model with the forward half of the main deck open and the aft half of
the main deck configured for passengers. However, the main deck and
upper deck will be certificated with limitations specifying zero
occupancy and zero cargo.
Boeing proposes to modify the configuration defined above by
installing a stair from the main deck to the forward lower lobe cargo
compartment and proposes to use the forward cargo compartment as a
service area and as a class C cargo compartment. Further, an air-stair
would be installed to allow walk-in access from the ground to the
forward lower lobe (service/cargo) compartment. The forward lower lobe
(service/cargo) compartment design would have provisions for
flammability and smoke protection. Access would be limited to one
trained crewmember and access would be allowed during flight but not
during taxi, takeoff and landing, or during a fire.
To accommodate access into the forward lower lobe (service/cargo)
compartment by a crewmember, Boeing proposes appropriate warning and
emergency equipment will be installed as defined for a lower lobe
service compartment in Sec. 25.819. A flight attendant seat will be
installed in the forward lower lobe (service/cargo) compartment for in-
flight emergency use only. The seat will be located so that it meets
all certification requirements for attendant seating. Speakers, warning
lights, and buzzers will be installed in the forward lower lobe
(service/cargo) compartment to warn the crewmember occupant of
turbulent conditions, smoke detection, or the need to leave the area. A
crew interphone will be provided for communications with the flight
deck. In addition, emergency oxygen equipment will be provided as
appropriate.
Boeing proposes the forward lower lobe (service/cargo) compartment
will meet the class C requirements of Sec. 25.857(c) and will include
an approved built-in fire extinguisher or suppression system
controllable from the cockpit. In the event of a fire, the forward
lower lobe (service/cargo) compartment will be evacuated, and the pilot
will initiate a Halon suppression system. A means will be provided to
prevent inadvertent access to the compartment when the fire suppression
system has been activated. The intention of the fire suppression system
is to eliminate the necessity for sending someone into the compartment
to fight a fire.
The existing regulations address a service area and a class C cargo
compartment as independent compartments, but do not address one
compartment that has two uses. The service compartment can be occupied
and the class C cargo compartment cannot. Further, fire fighting is
dealt with differently in each compartment. The crew fights a fire in a
service compartment and a flooding extinguisher system is used to fight
a fire in a class C cargo compartment. The concept Boeing proposes may
be acceptable if it can be assured that when the compartment is used
for either function, a level of safety would be achieved that would be
equivalent to compartment installations that are independent.
Therefore, special conditions requiring warnings, limitations, and
equipment installations are issued to achieve a level of safety that
would allow a lower lobe compartment to be used as a service
compartment or a class C cargo compartment when the aircraft is to be
certificated in a similar configuration to that which Boeing proposes
(i.e. forward lower lobe compartment with stair access, emergency
escape routes, etc.).
[[Page 63051]]
Type Certification Basis
Under the provisions of Sec. 21.101 Amendment 21-69, effective
September 16, 1991, the Boeing Commercial Airplane Group must show that
the Model 747-400 series airplane, as changed, continues to meet the
applicable provisions of the regulations incorporated by reference in
Type Certificate A20WE or the applicable regulations in effect on the
date of application for the change. Subsequent changes have been made
to Sec. 21.101 as part of Amendment 21-77, but those changes do not
become effective until June 10, 2003. The regulations incorporated by
reference in the type certificate are commonly referred to as the
``original type certification basis.'' The regulations incorporated by
reference in Type Certificate A20WE for the Boeing Model 747-400 series
airplanes include 14 CFR part 25, as amended by Amendments 25-1 through
25-70, with certain exceptions listed in the type data sheet. The U.S.
type certification basis for the Boeing Model 747-400 series airplane
is established in accordance with 14 CFR 21.17 and 21.21 and the type
certification application date. The type certification basis is listed
in Type Certificate Data Sheet No. A20WE.
If the Administrator finds that the applicable airworthiness
regulations (i.e., 14 CFR part 25) do not contain adequate or
appropriate safety standards for the Boeing Model 747-400 series
airplane because of a novel or unusual design feature, special
conditions are prescribed under the provisions of Sec. 21.16.
In addition to the applicable airworthiness regulations and special
conditions, the Boeing Model 747-400 series airplane must comply with
the fuel vent and exhaust emission requirements of 14 CFR part 34 and
the noise certification requirements of 14 CFR part 36.
Special conditions, as defined in Sec. 11.19, are issued in
accordance with Sec. 11.38 and become part of the type certification
basis in accordance with Sec. 21.101(b)(2) Amendment 21-69, effective
September 16, 1991.
Special conditions are initially applicable to the model for which
they are issued. Should the applicant apply for a supplemental type
certificate to modify any other model included on the same type
certificate to incorporate the same novel or unusual design feature,
the special conditions would also apply to the other model under the
provisions of Sec. 21.101(a)(1) Amendment 21-69, effective September
16, 1991.
Novel or Unusual Design Features
The Boeing Model 747-400 series airplane will incorporate the
following novel or unusual design features: the forward lower lobe
compartment will be used as a combined service area/class C cargo
compartment.
Discussion
The requirements listed in these special conditions are developed
to allow the use of the forward lower lobe as a service compartment and
as a class C cargo compartment during flight conditions. To make this
concept work, these special conditions establish communication,
warning, and personal safety requirements, because the existing
requirements, Sec. Sec. 25.819 versus 25.855, 25.857, and 25.858, are
exclusive. As an example, to use the fire control system of a class C
cargo compartment, the compartment must not be occupied because the
means of fire control is to flood the compartment with fire
suppressant.
The applicant has not proposed provisions satisfying regulatory
requirements for occupancy of the forward lower lobe (service/cargo)
compartment during taxi, takeoff, and landing. Therefore, the FAA will
apply appropriate limitations for taxi, takeoff, and landing.
The approach to establishing requirements for a common compartment
with two uses is to apply the existing requirements for a service
compartment when used as a service compartment and for cargo
compartments when used as a class C compartment, and to propose special
conditions where the rules are inadequate to address the functionality
of both.
Special Condition 1
Currently, Sec. 25.819 addresses a service compartment, which can
be occupied, but does not need to be evacuated under certain normal
conditions or under certain unsafe conditions (e.g., in the case of
fire, the occupant could function as a firefighter). The class C cargo
compartment requirements address a stand-alone cargo compartment that
is not occupied; fire detection is automatic and suppression relies on
a total flood system. To maintain the advantages of both a service
compartment and a class C cargo compartment, certain warnings need to
be addressed.
Special Condition 1(a)
Special Condition 1(a) will require a visual means in the cockpit
to advise the flightcrew when the forward lower lobe (service/cargo)
compartment is occupied. The potential exists that the forward lower
lobe (service/cargo) compartment may inadvertently be occupied when it
is not supposed to be, such as during taxi, takeoff and landing, or
during certain emergency events. This requirement ensures the
flightcrew is aware of that situation and can take appropriate action
to evacuate the forward lower lobe before flooding the compartment with
fire suppressant agent. The advisory should be clear as to its intent,
either by light with placard or lighted advisory message or equivalent.
Special Condition 1(b)
Special Condition 1(b) will require an ``on/off'' visual advisory/
warning stating ``Do Not Enter'' (or similar words) to be located
outside and on or near the entrance door from the main deck to the
forward lower lobe (service/cargo) compartment. The advisory/warning is
to be controlled from the flight deck. This is to prevent someone
entering the forward lower lobe (service/cargo) compartment when it is
not supposed to be occupied. Those conditions exist during taxi,
takeoff and landing, and if smoke or fire is detected. Opening the door
during a fire would, among other things, degrade the effectiveness of
the fire suppressant and allow smoke, flame, and/or suppressant into
the cabin.
Special Condition 1(c)
Special Condition 1(c) will require a visible and audible advisory/
warning means in the forward lower lobe (service/cargo) compartment to
notify the occupant that the occupant must exit the forward lower lobe
(service/cargo) compartment. To be effective, the visible and audible
advisory/warning must be able to be seen and heard from any part of the
compartment. The visible and audible advisory/warning is to be
controlled from the flight deck. As the forward lower lobe (service/
cargo) compartment may be occupied on the ground or in the air, a means
must be provided to notify the occupant to exit the compartment prior
to taxi, takeoff and landing, or during certain emergency conditions
(other than fire, which is dealt with under Special Condition 1(e)). A
visual advisory/warning is included in case the audible warning were to
become masked or distorted by engine, equipment, or ground noises.
Special Condition 1(d)
Special condition 1(d) will require a means (visible and audible)
to notify the occupant of the forward lower lobe (service/cargo)
compartment of the need
[[Page 63052]]
to put on supplemental oxygen equipment in the event of a
decompression. As the occupant could be anywhere in the forward lower
lobe (service/cargo) compartment, the means should be heard and be
visible from anywhere in the forward lower lobe (service/cargo)
compartment. Further, the warning should be distinct from other
warnings in the forward lower lobe (service/cargo) compartment to
prevent confusion and inappropriate action. An automatic decompression
warning (i.e., not requiring a separate crew action) ensures that the
forward lower lobe (service/cargo) compartment occupant does not delay
putting on the oxygen equipment. This section of the special conditions
is partially in lieu of the visual effect provided by the automatic
presentation feature required by Sec. 25.1447.
Special Condition 1(e)
Special Condition 1(e) will require a visible and audible means to
warn the occupant of the forward lower lobe (service/cargo) compartment
of the need to evacuate the forward lower lobe (service/cargo)
compartment if a fire is detected. The means must be heard and be
visible from anywhere in the forward lower lobe (service/cargo)
compartment and must be distinct from other warnings in the forward
lower lobe (service/cargo) compartment in order to prevent confusion
and to elicit correct action. The fire/smoke detection warning in the
forward lower lobe (service/cargo) compartment must be automatic (i.e.,
not requiring or depending on a separate crew action), to ensure that
the occupant exits the forward lower lobe (service/cargo) compartment
prior to the flight deck crew releasing the fire suppressant agent.
Special Condition 2
The lower lobe (service/cargo) compartment must be evacuated if a
fire occurs. Further, a means must be provided to prevent access into
the compartment during taxi, takeoff or landing, and in the event of a
fire. Placards and limitations assist in these situations.
Special Condition 2(a)
Special Condition 2(a) will require a placard to be located outside
the forward lower lobe (service/cargo) compartment door to limit access
to the forward lower lobe (service/cargo) compartment to one crewmember
trained in evacuation means. The accommodations and emergency support
equipment provided necessitate limiting access (i.e., one seat, one
oxygen bottle, one protective breathing device, one fire extinguisher,
etc.).
Special Condition 2(b)
Special Condition 2(b) will require placards, located inside and
outside the forward lower lobe (service/cargo) compartment door,
stating that the compartment door must remain closed except when
entering and leaving the compartment. The smoke/fire detection and
suppression systems are certified with the door closed, and the door
needs to remain closed to retain their certified characteristics and to
be effective. In the event the single occupant falls asleep in the
chair provided, the smoke alarm will still function and a warning will
be provided to warn the occupant to exit the compartment.
Special Condition 2(c)
Special Condition 2(c) will require a limitation be placed in the
airplane flight manual (AFM) and placards be posted inside and outside
the forward lower lobe (service/cargo) compartment door, all stating
that the forward lower lobe (service/cargo) compartment may not be
occupied during taxi, takeoff, landing, or during a fire emergency.
These placards are being specified because the compartment is not being
certified as occupied during taxi, takeoff, and landing and because the
cargo compartment must not be occupied during a fire so that the
occupant is not exposed to the fire and suppressant. These placards are
somewhat redundant to the advisory required under 1(b) and 1(c), but
have the benefit of the information being available to the occupant in
the event the flightcrew fails to activate the advisory/warnings of
1(b) and 1(c).
Special Condition 2(d)
Special Condition 2(d), with respect to the forward lower lobe
(service/cargo) compartment, will require the AFM supplement include
flight deck crew instructions for: allowing access; procedures for
fire/smoke/detection/fire fighting; procedures for decompression; and
limitations prohibiting occupancy during taxi, takeoff, and landing.
Further, this special condition would require that the weight and
balance manual include cargo loading restrictions requiring cargo to be
loaded and restrained in a manner so that escape paths are maintained.
These actions are to ensure the single flightcrew member can safely
access the cargo compartment during flight and exit safely during
failure conditions.
Special Condition 2(e)
Because access is being provided to the forward lower lobe
(service/cargo) compartment, there is a concern that, during flight,
passengers may retrieve hazardous materials and weapons stored in
luggage. Ideally, access could be prevented by locking the forward
lower lobe (service/cargo) compartment and that is one solution
(Special Condition 2(e)(1)). However, this airplane is being designed
for private use, will have limited access, and will have placards
limiting access. Further, there is notification to the flightcrew if
the forward lower lobe (service/cargo) compartment is occupied (Special
Condition 1(a)). Therefore, as an alternative to locking the lower lobe
(service/cargo) compartment, in addition to limiting access under
Special Conditions 2(a) and 2(d), prohibiting the airplane from being
operated for hire, or offered for common carriage, is issued (Special
Condition 2(e)(2)).
Special Condition 3
Special Condition 3 will require equipment in addition to that
required by Sec. 25.819.
Special Condition 3(a)
Special Condition 3(a) will require availability at all times of
portable oxygen equipment sufficient to supply a crewmember who is
allowed to occupy (except during taxi, takeoff and landing, and a fire)
the forward lower lobe (service/cargo) compartment. It was first
proposed that the oxygen bottle be stored inside the cargo compartment
near the seat, along with a portable extinguisher and a protective
breathing device. Because the portable oxygen bottle would not be
immediately available (a requirement of Sec. 25.1447(c)(1)) in the
event of rapid decompression, and it would not be advisable to provide
drop-down masks in a cargo compartment or store a portable oxygen
bottle in the compartment (even though the bottle would be afforded
some protection), the FAA elected to propose that a portable oxygen
bottle be mounted at the outside of the main deck entrance of the
forward lower lobe (service/cargo) compartment, along with a placard
that specifies that anyone entering the forward lower lobe (service/
cargo) compartment during flight must carry portable oxygen equipment
on their person for the entire time that they are in the compartment.
Special Condition 3(b)
Special Condition 3(b) will require at least one readily accessible
hand-held fire extinguisher and one 15-minute
[[Page 63053]]
protective breathing equipment device be located within the forward
lower lobe (service/cargo) compartment adjacent to the seat. This
ensures the occupant has the means to exit the compartment if a fire
occurs between the occupant and the exit.
Special Condition 3(c)
Special Condition 3(c) will require, in addition to the two
evacuation routes (including exit) requirements of Sec. 25.819(a), a
means to keep the evacuation routes clear. The cargo in the compartment
should be restrained to ensure that the crewmember's paths to the exits
are clear. Further, all entrances and exits from the forward lower lobe
(service/cargo) compartment must be capable of being closed after
exiting. In addition to the concern for cargo blocking the escape
paths, there is the concern about hazardous quantities of smoke,
flames, or fire suppressant agent entering any compartments occupied by
passengers or crew and the concern about the loss of fire suppressant
agent from the compartment during a fire. The forward lower lobe
(service/cargo) compartment must be capable of being closed off
because, after evacuation, it must comply with the requirements
applicable to the class C cargo compartment, including Sec. Sec.
25.855, 25.857, and 25.858.
Special Condition 3(d)
Special Condition 3(d) will require supplemental handheld lighting
(with locator light) in the event the occupant is in the forward lower
lobe (service/cargo) compartment and power to the compartment or the
emergency escape path lighting is off, or lost, or visibility is poor.
At least two flashlights would be required. One flashlight would be
located adjacent to the secondary emergency exit in the forward lower
lobe (service/cargo) compartment at the foot of the stairs in the
compartment. The other would be located adjacent to the seat in the
forward lower lobe (service/cargo) compartment. Note that this action
is in addition to the requirement for an automatic emergency lighting
system required by Sec. 25.819(a).
Special Condition 4
Special Condition 4 addresses training manuals and the training
associated with the special conditions above for:
(a) Use and actions associated with the warnings and placards of
these special conditions.
(b) Accessing and exiting the cargo forward lower lobe (service/
cargo) compartment, including emergency exiting (includes those special
conditions associated with Special Conditions 1(b), 1(c), 1(d), 1(e),
2(a), 2(b), 2(c), 2(d), and 3(b)).
(c) Checking the oxygen bottle's pressure for adequacy prior to
entering the cargo compartment (associated with Special Condition
3(a)).
(d) Carrying the oxygen bottle when entering the forward lower lobe
(service/cargo) compartment (associated with Special Condition 3(a)).
(e) Maintaining an exit path aisle and access to the evacuation
routes (associated with Special Condition 3(c)).
Special Condition 5
Special Conditions 25-71-NW-3, which included criteria applicable
to the stairs between the main deck and upper deck, were incorporated
in the Model 747 series airplane certification basis on August 27,
1976. These special conditions have been reviewed, and sections
3(a)(1), 3(a)(2) and 3(a)(7) are proposed as applicable to the stair
between the forward lower lobe (service/cargo) compartment and the main
deck. These special conditions are renumbered and repeated as 5(a),
5(b), and 5(c).
Discussion of Comments
Notice of proposed special conditions No. 25-02-07-SC for the
Boeing Model 747-400 series airplanes was published in the Federal
Register on July 1, 2002 (67 FR 44111). No comments were received, and
the special conditions are adopted as proposed.
Applicability
As discussed above, these special conditions are applicable to the
Boeing Model 747-400 series airplane. Should Boeing Commercial Airplane
Group apply at a later date for a supplemental type certificate to
modify any other model included on Type Certificate A20WE to
incorporate the same novel or unusual design feature, the special
conditions would apply to that model as well under the provisions of
Sec. 21.101(a)(1) Amendment 21-69, effective September 16, 1991.
Under standard practice, the effective date of final special
conditions would be 30 days after the date of publication in the
Federal Register; however, as the certification date for the Boeing
Model 747-400 series airplane is imminent, the FAA finds that good
cause exists to make these special conditions effective upon issuance.
Conclusion
This action affects only certain novel or unusual design features
on one model of airplane. It is not a rule of general applicability,
and it affects only the applicant who applied to the FAA for approval
of these features on the airplane.
List of Subjects in 14 CFR Part 25
Aircraft, Aviation safety, Reporting and recordkeeping
requirements.
The authority citation for these special conditions is as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701, 44702, 44704.
The Special Conditions
Accordingly, pursuant to the authority delegated to me by the
Administrator, the following special conditions are issued as part of
the type certification basis for Boeing Model 747-400 airplanes
modified by Boeing Commercial Airplane Group, Wichita Division
Designated Alteration Station, with a forward lower lobe configured for
use as a service compartment and a class C cargo compartment.
1. Required Warnings (in addition to fire/smoke detection and
decompression aural warnings required in Sec. 25.819(c)):
(a) There must be a visual means in the cockpit to advise the
flightcrew when the forward lower lobe (service/cargo) compartment is
occupied. The advisory light should be accompanied by a placard or
message indicating someone is in the forward lower lobe (service/cargo)
compartment.
(b) There must be an ``on/off'' visual advisory/warning stating
``Do Not Enter'' (or similar words) to be located outside and on or
near the entrance door to the forward lower lobe (service/cargo)
compartment. The advisory/warning is to be controlled from the flight
deck.
(c) There must be a visible and audible advisory/warning means in
the forward lower lobe (service/cargo) compartment to notify the
occupant that the occupant must exit the forward lower lobe (service/
cargo) compartment. The visible and audible warning must be seen and
heard from any part of the forward lower lobe (service/cargo)
compartment. The visible and audible advisory/warning is to be
controlled from the flight deck.
(d) A means (visible and audible) must be provided to notify the
occupant of the forward lower lobe (service/cargo) compartment of the
need to put on supplemental oxygen equipment in the event of a
decompression. The means must be heard and be visible from anywhere in
the forward lower lobe (service/cargo) compartment and be distinct from
other warnings in the forward lower lobe (service/cargo) compartment.
This decompression warning should be automatic (i.e., not requiring a
separate crew action), to ensure that the forward lower lobe
[[Page 63054]]
(service/cargo) compartment occupant does not delay putting on the
oxygen equipment. This section of the special conditions is partially
in lieu of the visual effect provided by the automatic presentation
feature required by Sec. 25.1447.
(e) A means (visible and audible) must be provided to warn the
occupant of the forward lower lobe (service/cargo) compartment of the
need to evacuate the forward lower lobe (service/cargo) compartment at
fire detection. The means must be heard and be visible from anywhere in
the forward lower lobe (service/cargo) compartment and be distinct from
other warnings in the forward lower lobe (service/cargo) compartment.
The fire/smoke detection warning in the forward lower lobe (service/
cargo) compartment must be automatic (i.e., not requiring a separate
crew action), to ensure that the occupant exits the forward lower lobe
(service/cargo) compartment prior to the flight deck crew releasing
fire suppressant agent.
2. Required Placards and Limitations (beyond those required in Part
25):
(a) There must be a placard located outside the forward lower lobe
(service/cargo) compartment door limiting access to the forward lower
lobe (service/cargo) compartment to one crewmember trained in
evacuation means.
(b) There must be placards located inside and outside the forward
lower lobe (service/cargo) compartment door stating that the forward
lower lobe (service/cargo) compartment door must remain closed except
when entering and leaving the compartment.
(c) A limitation must be placed in the airplane flight manual (AFM)
supplement and placards must be posted inside and outside the forward
lower lobe (service/cargo) compartment door, all stating that the
forward lower lobe (service/cargo) compartment may not be occupied
during taxi, takeoff, landing, or during a fire emergency.
(d) With respect to the forward lower lobe (service/cargo)
compartment, the AFM supplement must include flight deck crew
instructions for: allowing access; procedures for fire/smoke/detection/
fire fighting; procedures for decompression; limitations prohibiting
occupancy during taxi, takeoff, and landing. The weight and balance
manual must include cargo loading restrictions to maintain escape
paths.
(e) A limitation must be placed in the AFM Supplement stating:
``Carriage of hazardous material and/or weapons in the forward lower
lobe (service/cargo) compartment is prohibited'' unless:
(1) Access to the compartment is locked during flight and the key
to the lock remains with the flight deck crew only; or
(2) The airplane is not operated for hire, or offered for common
carriage. This provision does not preclude the operator from receiving
remuneration to the extent consistent with 14 CFR part 125, 14 CFR part
91, and subpart F, as applicable.
3. Required Equipment (in addition to that required by Sec.
25.819):
(a) There must be portable oxygen equipment available at all times
sufficient to supply a crewmember who is allowed to occupy the forward
lower lobe (service/cargo) compartment (except during taxi, takeoff and
landing, and a fire). The equipment is to be mounted at the outside of
the main deck entrance to the forward lower lobe (service/cargo)
compartment along with a placard specifying that anyone entering the
forward lower lobe (service/cargo) compartment during flight must carry
portable oxygen equipment on his/her person for the entire time that
he/she is in the forward lower lobe (service/cargo) compartment.
(b) At least one readily accessible hand-held fire extinguisher and
one 15-minute protective breathing equipment (PBE) device must be
located within the forward lower lobe (service/cargo) compartment
adjacent to the seat.
(c) In addition to the two evacuation route (including exit)
requirements of Sec. 25.819(a), a means must be provided to keep the
evacuation routes clear ; i.e., cargo in the compartment should be
restrained to ensure that the crewmember's paths to the exits are
clear. All entrances and exits from the forward lower lobe (service/
cargo) compartment must be capable of being closed after entering and
exiting and, after closing, must prevent hazardous quantities of smoke,
flames, or fire suppressant agent from entering any compartments
occupied by passengers or crew and must prevent loss of fire
suppressant agent during a fire.
(d) In addition to the emergency illumination required by Sec.
25.829(a), there must be supplemental handheld lighting (with locator
light) located within the forward lower lobe (service/cargo)
compartment. At least two flashlights will be required. One flashlight
must be located adjacent to the secondary emergency exit of the forward
lower lobe (service/cargo) compartment. The other must be adjacent to
the seat in the forward lower lobe (service/cargo) compartment.
4. Training manuals and training must include:
(a) Use and actions associated with warnings and placards specified
herein.
(b) Accessing and exiting the cargo forward lower lobe (service/
cargo) compartment, including emergency exiting.
(c) Checking the oxygen bottle's pressure for adequacy prior to
entering the forward lower lobe (service/cargo) compartment.
(d) Carrying the oxygen bottle when entering the forward lower lobe
(service/cargo) compartment.
(e) Maintaining exit path aisle and access for the evacuation
routes.
5. The stairway between the forward lower lobe (service/cargo)
compartment and the main deck (applicable portions excerpted from
Special Conditions 25-71-NM-3 issued August 27, 1976) must meet the
following requirements:
(a) The stairway must have essentially straight route segments with
a landing at each significant change in segment direction.
(b) The stairs must have essentially rectangular treads.
(c) General illumination must be provided so that, when measured
along the centerlines of each tread and landing, the illumination is
not less than .05 foot-candle.
Issued in Renton, Washington, on September 30, 2002.
Ali Bahrami,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 02-25707 Filed 10-9-02; 8:45 am]
BILLING CODE 4910-13-P