[Federal Register Volume 64, Number 175 (Friday, September 10, 1999)]
[Proposed Rules]
[Pages 49115-49117]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 99-23620]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 98-NM-312-AD]
RIN 2120-AA64
Airworthiness Directives; Cessna Model 560 Series Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: This document proposes the supersedure of an existing
airworthiness directive (AD), applicable to certain Cessna Model 560
series airplanes, that currently requires revising the FAA-approved
Airplane Flight Manual (AFM) to provide the flightcrew with
limitations, operational procedures, and performance information to be
used during approach and landing when residual ice is present or can be
expected. That action was prompted by reports indicating that, while
operating in icing conditions or when ice is on the wings, some of
these airplanes have experienced uncommanded roll at (or slightly
higher than) the speed at which the stall warning system is activated.
This action would require revising the AFM and would revise the
applicability of the existing AD. This action also would require
modification of the stall warning system of the angle-of-attack
computer. The actions specified by the proposed AD are intended to
prevent uncommanded roll of the airplane during approach and landing
when residual ice is present or can be expected.
DATES: Comments must be received by October 25, 1999.
ADDRESSES: Submit comments in triplicate to the Federal Aviation
Administration (FAA), Transport Airplane Directorate, ANM-114,
Attention: Rules Docket No. 98-NM-312-AD, 1601 Lind Avenue, SW.,
Renton, Washington 98055-4056. Comments may be inspected at this
location between 9:00 a.m. and 3:00 p.m., Monday through Friday, except
Federal holidays.
The service information referenced in the proposed rule may be
obtained from Cessna Aircraft Co., P.O. Box 7706, Wichita, Kansas
67277. This information may be examined at the FAA, Transport Airplane
Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA,
Small Airplane Directorate, Wichita Aircraft Certification Office, 1801
Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas.
FOR FURTHER INFORMATION CONTACT: Carlos Blacklock, Aerospace Engineer,
Flight Test and Program Management Branch, ACE-117W, FAA, Small
Airplane Directorate, Wichita Aircraft Certification Office, 1801
Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209;
telephone (316) 946-4166; fax (316) 946-4407.
SUPPLEMENTARY INFORMATION:
Comments Invited
Interested persons are invited to participate in the making of the
proposed rule by submitting such written data, views, or arguments as
they may desire. Communications shall identify the Rules Docket number
and be submitted in triplicate to the address specified above. All
communications received on or before the closing date for comments,
specified above, will be considered before taking action on the
proposed rule. The proposals contained in this notice may be changed in
light of the comments received.
Comments are specifically invited on the overall regulatory,
economic, environmental, and energy aspects of the proposed rule. All
comments submitted will be available, both before and after the closing
date for comments, in the Rules Docket for examination by interested
persons. A report summarizing each FAA-public contact concerned with
the substance of this proposal will be filed in the Rules Docket.
Commenters wishing the FAA to acknowledge receipt of their comments
submitted in response to this notice must submit a self-addressed,
stamped postcard on which the following statement is made: ``Comments
to Docket Number 98-NM-312-AD.'' The postcard will be date stamped and
returned to the commenter.
[[Page 49116]]
Availability of NPRMs
Any person may obtain a copy of this NPRM by submitting a request
to the FAA, Transport Airplane Directorate, ANM-114, Attention: Rules
Docket No. 98-NM-312-AD, 1601 Lind Avenue, SW., Renton, Washington
98055-4056.
Discussion
On November 29, 1996, the FAA issued AD 96-24-06, amendment 39-9844
(61 FR 64456, December 5, 1996), applicable to certain Cessna Model 560
series airplanes, to require revising the FAA-approved Airplane Flight
Manual (AFM) to provide the flightcrew with limitations, operational
procedures, and performance information to be used during approach and
landing when residual ice is present or can be expected. That action
was prompted by reports indicating that, while operating in icing
conditions or when ice is on the wings, some of these airplanes have
experienced uncommanded roll at (or slightly higher than) the speed at
which the stall warning system is activated. The requirements of that
AD are intended to prevent uncommanded roll of the airplane during
approach and landing when residual ice is present or can be expected.
Actions Since Issuance of Previous Rule
In the preamble of AD 96-24-06, the FAA indicated that the actions
required by that AD were considered ``interim action'' and that further
rulemaking action was being considered. The FAA now has determined that
further rulemaking action is indeed necessary; this AD follows from
that determination.
The manufacturer has developed a modification to the stall warning
system of the angle-of-attack computer, which will increase the stall
warning margin during flight in icing conditions. Additionally, the
manufacturer has made changes to the AFM, which provide limitations,
operational procedures, and performance information to be used during
approach and landing when residual ice is present or can be expected.
Explanation of Relevant Service Information
The FAA has reviewed and approved Cessna Model 560 Citation V
Ultra, AFM Revision 7, dated July 16, 1998, and Cessna Model 560
Citation V, AFM Revision 11, dated July 16, 1998. These AFM revisions
provide the flightcrew with limitations, operational procedures, and
performance information to be used during approach and landing when
residual ice is present or can be expected.
The FAA also has reviewed and approved Cessna Service Bulletins
SB560-34-69, Revision 2, dated July 24, 1998, and SB560-34-70, dated
July 14, 1998. These service bulletins describe procedures for
modification of the stall warning system of the angle-of-attack
computer. This modification involves replacing the angle-of-attack
computer with a new, improved computer and installing related wiring.
Accomplishment of the action specified in the applicable service
bulletin and AFM is intended to adequately address the identified
unsafe condition.
Explanation of Requirements of Proposed Rule
Since an unsafe condition has been identified that is likely to
exist or develop on other products of this same type design, the
proposed AD would supersede all the requirements of AD 96-24-06. This
proposed AD would require revising the AFM and would revise the
applicability of the existing AD to exclude certain airplanes on which
the modification was accomplished during manufacturing. This action
also would require modification of the stall warning system of the
angle-of-attack computer. The actions would be required to be
accomplished in accordance with the applicable service bulletin and
revision to the AFM described previously.
Cost Impact
There are approximately 437 airplanes of the affected design in the
worldwide fleet. The FAA estimates that 327 airplanes of U.S. registry
would be affected by this proposed AD.
For all airplanes, the new AFM revision that is proposed in this AD
action would take approximately 1 work hour per airplane to accomplish,
at an average labor rate of $60 per work hour. Based on these figures,
the cost impact of the AFM revision proposed by this AD on U.S.
operators is estimated to be $19,620, or $60 per airplane.
For airplanes listed in Cessna Service Bulletin SB560-34-69, the
new modification that is proposed in this AD action would take
approximately 40 work hours per airplane to accomplish, at an average
labor rate of $60 per work hour. Required parts would cost
approximately $8,036 per airplane. Based on these figures, the cost
impact of the modification proposed by this AD on U.S. operators is
estimated to be $10,436 per airplane.
For airplanes listed in Cessna Service Bulletin SB560-34-70, the
new modification that is proposed in this AD action would take
approximately 40 work hours per airplane to accomplish, at an average
labor rate of $60 per work hour. Required parts would cost
approximately $7,762 per airplane. Based on these figures, the cost
impact of the modification proposed by this AD on U.S. operators is
estimated to be $10,162 per airplane.
The cost impact figures discussed above are based on assumptions
that no operator has yet accomplished any of the current or proposed
requirements of this AD action, and that no operator would accomplish
those actions in the future if this AD were not adopted.
Regulatory Impact
The regulations proposed herein would not have substantial direct
effects on the States, on the relationship between the national
government and the States, or on the distribution of power and
responsibilities among the various levels of government. Therefore, in
accordance with Executive Order 12612, it is determined that this
proposal would not have sufficient federalism implications to warrant
the preparation of a Federalism Assessment.
For the reasons discussed above, I certify that this proposed
regulation (1) is not a ``significant regulatory action'' under
Executive Order 12866; (2) is not a ``significant rule'' under the DOT
Regulatory Policies and Procedures (44 FR 11034, February 26, 1979);
and (3) if promulgated, will not have a significant economic impact,
positive or negative, on a substantial number of small entities under
the criteria of the Regulatory Flexibility Act. A copy of the draft
regulatory evaluation prepared for this action is contained in the
Rules Docket. A copy of it may be obtained by contacting the Rules
Docket at the location provided under the caption ADDRESSES.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Safety.
The Proposed Amendment
Accordingly, pursuant to the authority delegated to me by the
Administrator, the Federal Aviation Administration proposes to amend
part 39 of the Federal Aviation Regulations (14 CFR part 39) as
follows:
PART 39--AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
2. Section 39.13 is amended by removing amendment 39-9844 (61 FR
[[Page 49117]]
64456, December 5, 1996), and by adding a new airworthiness directive
(AD), to read as follows:
Cessna Aircraft Company: Docket 98-NM-312-AD. Supersedes AD 96-24-
06, Amendment 39-9844.
Applicability: Model 560 series airplanes having serial numbers
(S/N) 560-0001 through 560-0437 inclusive; certificated in any
category.
Note 1: This AD applies to each airplane identified in the
preceding applicability provision, regardless of whether it has been
modified, altered, or repaired in the area subject to the
requirements of this AD. For airplanes that have been modified,
altered, or repaired so that the performance of the requirements of
this AD is affected, the owner/operator must request approval for an
alternative method of compliance in accordance with paragraph (d) of
this AD. The request should include an assessment of the effect of
the modification, alteration, or repair on the unsafe condition
addressed by this AD; and, if the unsafe condition has not been
eliminated, the request should include specific proposed actions to
address it.
Compliance: Required as indicated, unless accomplished
previously.
To prevent uncommanded roll of the airplane during approach and
landing when residual ice is present or can be expected, accomplish
the following:
Airplane Flight Manual (AFM) Revisions
(a) Within 10 days after the effective date of this AD, revise
the FAA-approved AFM; to provide the flightcrew with limitations,
operational procedures, and performance information to be used
during approach and landing when residual ice is present or can be
expected; in accordance with the applicable revision of the AFM
specified in paragraph (a)(1) or (a)(2) of this AD.
(1) For airplanes having S/N's 560-0001 through 560-0259
inclusive: AFM Model 560 Citation V, Revision 11, dated July 16,
1998.
(2) For airplanes having S/N's 560-0260 through 560-0437
inclusive: AFM Model 560 Citation V Ultra, Revision 7, dated July
16, 1998.
Modification
(b) Within 6 months after the effective date of this AD, modify
the stall warning system of the angle-of-attack computer of the
navigational system, in accordance with paragraph (b)(1) or (b)(2),
as applicable, of this AD.
(1) For airplanes having S/N's 560-0001 through 560-0055
inclusive: Modify in accordance with Cessna Service Bulletin SB560-
34-70, dated July 14, 1998.
(2) For airplanes having S/N's 560-0056 through 560-0437
inclusive: Modify in accordance with Cessna Service Bulletin SB560-
34-69, Revision 2, dated July 24, 1998.
Spares
(c) As of the effective date of this AD, no person shall install
on any airplane an angle-of-attack computer having part number
C11606-2 or C11606-3.
Alternative Methods of Compliance
(d) An alternative method of compliance or adjustment of the
compliance time that provides an acceptable level of safety may be
used if approved by the Manager, Wichita Aircraft Certification
Office (ACO), FAA, Small Airplane Directorate. Operators shall
submit their requests through an appropriate FAA Principal
Maintenance Inspector, who may add comments and then send it to the
Manager, Wichita ACO.
Note 2: Information concerning the existence of approved
alternative methods of compliance with this AD, if any, may be
obtained from the Wichita ACO.
Special Flight Permits
(e) Special flight permits may be issued in accordance with
sections 21.197 and 21.199 of the Federal Aviation Regulations (14
CFR 21.197 and 21.199) to operate the airplane to a location where
the requirements of this AD can be accomplished.
Issued in Renton, Washington, on September 3, 1999.
Dorenda D. Baker,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 99-23620 Filed 9-9-99; 8:45 am]
BILLING CODE 4910-13-P