[Federal Register Volume 75, Number 51 (Wednesday, March 17, 2010)]
[Rules and Regulations]
[Pages 12657-12659]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-5290]
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Rules and Regulations
Federal Register
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Federal Register / Vol. 75, No. 51 / Wednesday, March 17, 2010 /
Rules and Regulations
[[Page 12657]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2010-0221; Directorate Identifier 2010-NM-043-AD;
Amendment 39-16233; AD 2010-06-09]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Model 777-200, -
200LR, -300, -300ER, and 777F Series Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule; request for comments.
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SUMMARY: We are adopting a new airworthiness directive (AD) for certain
Model 777-200, -200LR, -300, -300ER, and 777F series airplanes. This AD
requires installing new operational program software for the autopilot
flight director computers. This AD results from reports of rejected
takeoffs at speeds above takeoff decision speed following inadvertent
autopilot engagement on the ground, and from the discovery during
flight simulations that the climb gradient is less than optimal for
obstacle clearance during a performance-limited takeoff situation. We
are issuing this AD to prevent inadvertent engagement of the autopilot
during takeoff roll, which could result in rejected takeoff at rotation
speed, and consequent possible overrun of the runway. We are also
issuing this AD to prevent a lower-than-optimal climb gradient during
takeoff, and consequent failure to clear obstacles on the ground during
a performance-limited takeoff.
DATES: This AD is effective April 1, 2010.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in the AD as of April 1,
2010.
We must receive comments on this AD by May 3, 2010.
ADDRESSES: You may send comments by any of the following methods:
Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
Fax: 202-493-2251.
Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue, SE., Washington, DC 20590.
Hand Delivery: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m.,
Monday through Friday, except Federal holidays.
For service information identified in this AD, contact Boeing
Commercial Airplanes, Attention: Data & Services Management, P.O. Box
3707, MC 2H-65, Seattle, Washington 98124-2207; telephone 206-544-5000,
extension 1; fax 206-766-5680; e-mail [email protected]; Internet
https://www.myboeingfleet.com.
Examining the AD Docket
You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Management Facility
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains this AD, the regulatory evaluation,
any comments received, and other information. The street address for
the Docket Office (telephone 800-647-5527) is in the ADDRESSES section.
Comments will be available in the AD docket shortly after receipt.
FOR FURTHER INFORMATION CONTACT: Frank van Leynseele, Aerospace
Engineer, Systems and Equipment Branch, ANM-130S, FAA, Seattle Aircraft
Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98057-
3356; telephone (425) 917-6492; fax (425) 917-6590.
SUPPLEMENTARY INFORMATION:
Discussion
We have received reports (including two in January 2010) of
rejected takeoffs at speeds above takeoff decision speed following
inadvertent engagement of the autopilot on the ground. Since 1995,
there have been nine reported instances of a rejected takeoff because
of higher than normal control column forces at takeoff rotation due to
the pilot inadvertently engaging the autopilot in lower-speed takeoff
roll. When the flightcrew inadvertently engages the autopilot on ground
during the lower-speed phase of the takeoff roll, the control column
forces will be higher than normal when the pilot attempts to initiate
the takeoff rotation. This condition, if not corrected, could result in
rejected takeoff at rotation speed, and consequent possible overrun of
the runway.
The Boeing Company has also discovered during flight simulations
that the climb gradient is less than optimal for obstacle clearance
during a one-engine takeoff (performance-limited) situation. This is
caused by an error in the pitch command law of the autopilot flight
director computer (AFDC). This condition, if not corrected, could
result in a lower-than-optimal climb gradient during takeoff, and
consequent failure to clear obstacles on the ground during a
performance-limited takeoff.
Relevant Service Information
We reviewed Boeing Alert Service Bulletin 777-22A0024, dated
January 22, 2010. The alert service bulletin describes procedures for
installing new operational program software for the left, center, and
right AFDCs. The new software will disengage the autopilot whenever the
flaps are extended and the airplane is on the ground and not in rollout
mode. Autopilot engagement is inhibited when the flaps are extended and
the airplane is on the ground or below 50 feet above ground level. The
new software also maintains the initial engine-out (performance-
limited) takeoff pitch target for a longer duration to minimize
altitude loss during the takeoff, and targets a velocity to maximize
climbout performance.
FAA's Determination and Requirements of This AD
We are issuing this AD because we evaluated all the relevant
information and determined the unsafe conditions described previously
are likely to exist or develop in other products of these same type
designs. This AD requires accomplishing the actions specified in the
service information described previously, except as discussed under
``Differences Between the AD and the Service Information.''
[[Page 12658]]
Differences Between the AD and the Service Information
Although Boeing Alert Service Bulletin 777-22A0024, dated January
22, 2010, recommends accomplishing the operational program software
installation ``within 12 months after the original issue date of this
service bulletin,'' we have determined that this compliance time would
not address the identified unsafe conditions in a timely manner. In
developing an appropriate compliance time for this AD, we considered
not only the manufacturer's recommendation, but the degree of urgency
associated with addressing the subject unsafe condition, the average
utilization of the affected fleet, and the time necessary to perform
the operational program software installation. In light of all of these
factors, we find a compliance time of 90 days after the effective date
of this AD for completing the required actions to be warranted, in that
it represents an appropriate interval of time for affected airplanes to
continue to operate without compromising safety. This difference has
been coordinated with The Boeing Company.
FAA's Justification and Determination of the Effective Date
A rejected takeoff at rotation speed significantly increases the
risk of a runway overrun, and a lower-than-optimal climb gradient
during a performance-limited takeoff drastically increases the risk of
failure of the airplane to clear obstacles on the ground during the
initial climb phase after takeoff. Both of these conditions can result
in fatal injury to flightcrew, passengers, and people on the ground, as
well as extensive damage to the airplane and property on the ground.
Because of our requirement to promote safe flight of civil aircraft and
thus the critical need to ensure the proper functioning of the
autopilot flight director system, in addition to the two recent reports
and the short compliance time involved with this action, this AD must
be issued immediately.
Because an unsafe condition exists that requires the immediate
adoption of this AD, we find that notice and opportunity for prior
public comment hereon are impracticable and that good cause exists for
making this amendment effective in less than 30 days.
Comments Invited
This AD is a final rule that involves requirements affecting flight
safety, and we did not provide you with notice and an opportunity to
provide your comments before it becomes effective. However, we invite
you to send any written data, views, or arguments about this AD. Send
your comments to an address listed under the ADDRESSES section. Include
``Docket No. FAA-2010-0221; Directorate Identifier 2010-NM-043-AD'' at
the beginning of your comments. We specifically invite comments on the
overall regulatory, economic, environmental, and energy aspects of this
AD. We will consider all comments received by the closing date and may
amend this AD because of those comments.
We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this AD.
Authority for This Rulemaking
Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. ``Subtitle VII: Aviation
Programs,'' describes in more detail the scope of the Agency's
authority.
We are issuing this rulemaking under the authority described in
``Subtitle VII, Part A, Subpart III, Section 44701: General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
rulemaking action.
Regulatory Findings
This AD will not have federalism implications under Executive Order
13132. This AD will not have a substantial direct effect 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.
For the reasons discussed above, I certify that this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Is not a ``significant rule'' under DOT Regulatory Policies and
Procedures (44 FR 11034, February 26, 1979), and
(3) 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.
You can find our regulatory evaluation and the estimated costs of
compliance in the AD Docket.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
Adoption of the Amendment
0
Accordingly, under the authority delegated to me by the Administrator,
the FAA amends 14 CFR part 39 as follows:
PART 39--AIRWORTHINESS DIRECTIVES
0
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]
0
2. The FAA amends Sec. 39.13 by adding the following new AD:
2010-06-09 The Boeing Company: Amendment 39-16233. Docket No. FAA-
2010-0221; Directorate Identifier 2010-NM-043-AD.
Effective Date
(a) This airworthiness directive (AD) is effective April 1,
2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to The Boeing Company Model 777-200, -200LR,
-300, -300ER, and 777F series airplanes, certificated in any
category; as identified in Boeing Alert Service Bulletin 777-
22A0024, dated January 22, 2010.
Subject
(d) Air Transport Association (ATA) of America Code 22: Auto
Flight.
Unsafe Condition
(e) This AD results from reports of rejected takeoffs at speeds
above takeoff decision speed following inadvertent autopilot
engagement on the ground, and from the discovery during flight
simulations that the climb gradient is less than optimal for
obstacle clearance during a performance-limited takeoff situation.
The Federal Aviation Administration is issuing this AD to prevent
inadvertent engagement of the autopilot during takeoff roll, which
could result in rejected takeoff at rotation speed, and consequent
possible overrun of the runway. We are also issuing this AD to
prevent a lower-than-optimal climb gradient during takeoff, and
consequent failure to clear obstacles on the ground during a
performance-limited takeoff.
Compliance
(f) You are responsible for having the actions required by this
AD performed within the compliance times specified, unless the
actions have already been done.
[[Page 12659]]
Software Installation for the Autopilot Flight Director Computers
(g) Within 90 days after the effective date of this AD, install
new operational program software in the left, center, and right
autopilot flight director computers, in accordance with the
Accomplishment Instructions of Boeing Alert Service Bulletin 777-
22A0024, dated January 22, 2010.
Special Flight Permit
(h) Special flight permits, as described in Section 21.197 and
Section 21.199 of the Federal Aviation Regulations (14 CFR 21.197
and 21.199), are not allowed.
Alternative Methods of Compliance (AMOCs)
(i)(1) The Manager, Seattle Aircraft Certification Office (ACO),
FAA, has the authority to approve AMOCs for this AD, if requested
using the procedures found in 14 CFR 39.19. Send information to
Attn: Frank van Leynseele, Aerospace Engineer, Systems and Equipment
Branch, ANM-130S, FAA, Seattle Aircraft Certification Office, 1601
Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425)
917-6492; fax (425) 917-6590. Information may be e-mailed to: [email protected].
(2) To request a different method of compliance or a different
compliance time for this AD, follow the procedures in 14 CFR 39.19.
Before using any approved AMOC on any airplane to which the AMOC
applies, notify your principal maintenance inspector (PMI) or
principal avionics inspector (PAI), as appropriate, or lacking a
principal inspector, your local Flight Standards District Office.
The AMOC approval letter must specifically reference this AD.
Material Incorporated by Reference
(j) You must use Boeing Alert Service Bulletin 777-22A0024,
dated January 22, 2010, to do the actions required by this AD,
unless the AD specifies otherwise.
(1) The Director of the Federal Register approved the
incorporation by reference of this service information under 5
U.S.C. 552(a) and 1 CFR part 51.
(2) For service information identified in this AD, contact
Boeing Commercial Airplanes, Attention: Data & Services Management,
P.O. Box 3707, MC 2H-65, Seattle, Washington 98124-2207; telephone
206-544-5000, extension 1; fax 206-766-5680; e-mail
[email protected]; Internet https://www.myboeingfleet.com.
(3) You may review copies of the service information at the FAA,
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton,
Washington. For information on the availability of this material at
the FAA, call 425-227-1221 or 425-227-1152.
(4) You may also review copies of the service information that
is incorporated by reference at the National Archives and Records
Administration (NARA). For information on the availability of this
material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.
Issued in Renton, Washington, on March 3, 2010.
Suzanne Masterson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2010-5290 Filed 3-16-10; 8:45 am]
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