[Federal Register Volume 82, Number 139 (Friday, July 21, 2017)]
[Rules and Regulations]
[Pages 33782-33785]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2017-14929]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2016-9501; Directorate Identifier 2016-NM-137-AD;
Amendment 39-18961; AD 2017-15-01]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: We are adopting a new airworthiness directive (AD) for certain
The Boeing Company Model 777 airplanes. This AD was prompted by reports
of uncommanded altitude display changes in the mode control panel (MCP)
altitude window. This AD requires replacing the existing MCP with a new
MCP having a different part number. We are issuing this AD to address
the unsafe condition on these products.
DATES:
This AD is effective August 25, 2017.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of August 25,
2017.
ADDRESSES: For service information identified in this final rule,
contact Boeing Commercial Airplanes, Attention: Contractual & Data
Services (C&DS), 2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA
90740-5600; telephone 562-797-1717; Internet https://www.myboeingfleet.com. You may view this referenced service information
at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW.,
Renton, WA. For information on the availability of this material at the
FAA, call 425-227-1221. It is also available on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2016-
9501.
Examining the AD Docket
You may examine the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2016-
9501; 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 address for the Docket Office (phone: 800-647-
5527) is Docket Management Facility, U.S. Department of Transportation,
Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200
New Jersey Avenue SE., Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Frank Carreras, Aerospace Engineer,
Systems and Equipment Branch, ANM-130S, FAA, Seattle Aircraft
Certification Office (ACO), 1601 Lind Avenue SW., Renton, WA 98057-
3356; phone: 425-917-6442; fax: 425-917-6590; email:
[email protected].
SUPPLEMENTARY INFORMATION:
[[Page 33783]]
Discussion
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would apply to certain The Boeing Company
Model 777 airplanes. The NPRM published in the Federal Register on
December 20, 2016 (81 FR 92740) (``the NPRM''). The NPRM was prompted
by reports of uncommanded altitude display changes in the MCP altitude
window. The NPRM proposed to require replacing the existing MCP with a
new MCP having a different part number. We are issuing this AD to
prevent uncommanded changes to the MCP selected at altitude; such
uncommanded changes could result in incorrect spatial separation
between airplanes, midair collision, or controlled flight into terrain.
Comments
We gave the public the opportunity to participate in developing
this AD. The following presents the comments received on the NPRM and
the FAA's response to each comment.
Support for the NPRM
Boeing and FedEx stated that they concur with the contents of the
NPRM.
Request To Reduce the Compliance Time
Air Line Pilots Association, International (ALPA), indicated its
support for the NPRM but requested that the compliance time in
paragraph (g) of the proposed AD be reduced from 60 months to 50
months. The commenter did not provide justification for its request.
We do not agree with the commenter's request to reduce the
compliance time. In developing an appropriate compliance time, we
considered the safety implications and the availability of required
parts. In addition, we also received manufacturer concurrence for the
60-month compliance time. In consideration of all of these factors, we
determined that the compliance time, as proposed, represents an
appropriate interval in which the MCP parts can be replaced in a timely
manner within the fleet, while still maintaining an adequate level of
safety. For most ADs, operators are permitted to accomplish the
requirements at a time earlier than the specified compliance time; for
this AD, an operator may choose to replace the affected MCP at any time
up to 60 months after the effective date of this AD. If additional data
are presented that would justify a shorter compliance time, we might
consider further rulemaking on this issue. We have not changed this AD
in this regard.
Request To Revise the Applicability
United Airlines (UAL) requested that the applicability of the
proposed AD be limited to only those MCP series parts on which the
uncommanded changes in the speed/mach window occurred. The commenter
noted that the NPRM did not indicate if the uncommanded changes were
reported on all three MCP series parts (MCP-770, MCP-771, and MCP-770C)
or only one MCP series part. The commenter suggested that if the
uncommanded changes occurred only on one MCP series part, then the
applicability of the proposed AD should be limited to that particular
MCP series part. The commenter observed that this would reduce the
number of MCP parts that need to be replaced or upgraded and reduce the
compliance time needs.
We agree that clarification is necessary regarding the affected MCP
series parts. Based on the manufacturer's installation review, the
unsafe condition has been identified to exist in all three MCP series
parts. Therefore, no change to this AD is required regarding this
issue.
Request To Review the MCP Design
One commenter, Geoffrey Barrance, noted that the FAA has issued AD
2016-25-01, Amendment 39-18727 (81 FR 94949, December 27, 2016), which
addressed uncommanded autopilot engagement before takeoff. The
commenter thought that there was a similarity in the root causes
(malfunction of the MCP) of the unsafe conditions in AD 2016-25-01 and
this final rule. The commenter recommended that the FAA initiate a
review of the MCP design, including changes that might have been
introduced over the life of these units, to identify if the design was
initially susceptible to, or has been subsequently compromised in a way
that could result in the unsafe conditions of both ADs.
We infer the commenter may think the unsafe condition associated
with AD 2016-25-01 resulted from a similar root cause as the unsafe
condition addressed by this AD based on a statement in the Discussion
section of the NPRM (80 FR 79735, December 23, 2015) associated with AD
2016-25-01. That statement noted that ``the erroneous autopilot engage
request is believed to have come from the mode control panel (MCP) and
to have been caused by contamination within the MCP.'' During the
public comment period for the NPRM associated with AD 2016-25-01,
Boeing stated that this statement was speculative and requested that
the FAA remove it and replace it with a statement that possible
failures in the autopilot flight director system can cause an
uncommanded engagement of the autopilot. We agreed the replacement
statement would be less speculative; however, because the Discussion
section of an NPRM is not repeated in the final rule, AD 2016-25-01 was
not revised.
We do not agree with the commenter's request because we have
determined that there is no similarity in the root cause of the unsafe
condition of AD 2016-25-01 and this AD. The unsafe condition identified
in AD 2016-25-01 is different from the unsafe condition identified in
this final rule. AD 2016-25-01 addresses uncommanded autopilot
engagement on the ground, potentially resulting in incorrect stabilizer
trim adjustment during takeoff. This final rule addresses uncommanded
altitude display changes in the MCP while the autopilot is engaged. We
have not changed this AD regarding this issue.
Requests To Revise the Estimated Costs of Compliance
Cathay Pacific Airlines asked why operators are being charged for
the parts and labor associated with compliance with the proposed AD if
the unsafe condition is the result of a design flaw (the problematic
MCP-770 part) that could not be detected during flight tests or the
design phase. We infer that the commenter is requesting that either the
estimated costs of the proposed AD be revised or the manufacturer's
warranty coverage.
We do not agree to revise the cost estimates. We do not control the
manufacturer's warranty coverage. We have identified an unsafe
condition that must be corrected to ensure that airplanes are operated
in an airworthy condition, as required by the Federal Aviation
Regulations. We have not changed this AD in regard to this issue.
UAL requested a revision to the estimated costs of the proposed AD
because the estimated costs provided are too low. UAL stated that only
MCP-770C can be upgraded and all other MCP series parts would need to
be replaced. UAL observed that its estimated fleet cost would exceed
$8,000,000.
We do not agree with the commenter's request. We acknowledge that
the cost estimate does not include the cost of a new MCP. The estimated
costs in the NPRM were based on data provided in Boeing Special
Attention Service Bulletin 777-22-0034, dated March 3, 2016. The cost
section of the NPRM indicated that we have received no definitive data
regarding the cost of a new MCP. Although UAL provided a
[[Page 33784]]
cost estimate for its fleet, we still have not received a definitive
cost estimate for a new MCP. We have not changed this AD regarding this
issue.
Conclusion
We reviewed the relevant data, considered the comments received,
and determined that air safety and the public interest require adopting
this AD as proposed except for minor editorial changes. We have
determined that these minor changes:
Are consistent with the intent that was proposed in the
NPRM for correcting the unsafe condition; and
Do not add any additional burden upon the public than was
already proposed in the NPRM.
We also determined that these changes will not increase the
economic burden on any operator or increase the scope of this AD.
Related Service Information Under 1 CFR Part 51
We reviewed Boeing Special Attention Service Bulletin 777-22-0034,
dated March 3, 2016. The service information describes procedures for
replacing the existing MCP part with a new MCP part having a different
part number, in the glareshield in the flight compartment. This service
information is reasonably available because the interested parties have
access to it through their normal course of business or by the means
identified in the ADDRESSES section.
Costs of Compliance
We estimate that this AD affects 203 airplanes of U.S. registry. We
estimate the following costs to comply with this AD:
Estimated Costs
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Cost per
Action Labor cost Parts cost product Cost on U.S. operators
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Replacement.................. 2 work-hours x $85 Up to $5,800\1\. Up to $5,970... Up to $1,211,910.\1\
per hour = $170.
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\1\ Since we have received no definitive data regarding the cost of a new MCP we have provided costs for the
upgrade (modified part) only.
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),
(3) Will not affect intrastate aviation in Alaska, and
(4) 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.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
Adoption of the Amendment
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 airworthiness
directive (AD):
2017-15-01 The Boeing Company: Amendment 39-18961; Docket No. FAA-
2016-9501; Directorate Identifier 2016-NM-137-AD.
(a) Effective Date
This AD is effective August 25, 2017.
(b) Affected ADs
None.
(c) Applicability
This AD applies to The Boeing Company Model 777-200, -200LR, -
300, -300ER, and 777F series airplanes, certificated in any
category, identified in Boeing Special Attention Service Bulletin
777-22-0034, dated March 3, 2016.
(d) Subject
Air Transport Association (ATA) of America Code 22; Auto flight.
(e) Unsafe Condition
This AD was prompted by reports of uncommanded altitude display
changes in the mode control panel (MCP) altitude window. We are
issuing this AD to prevent uncommanded changes to the MCP selected
altitude; such uncommanded changes could result in incorrect spatial
separation between airplanes, midair collision, or controlled flight
into terrain.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Replacement of MCP
Within 60 months after the effective date of this AD: Replace
the existing MCP part with a new MCP part having a different part
number, in accordance with the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 777-22-0034, dated March 3, 2016.
(h) Alternative Methods of Compliance (AMOCs)
(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. In accordance with 14
CFR 39.19, send your request to your principal inspector or local
Flight Standards District Office, as appropriate. If sending
information directly to the manager of the ACO, send it to the
attention of the person identified in paragraph (i) of this AD.
Information may be emailed to: [email protected].
[[Page 33785]]
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the local flight standards district office/certificate holding
district office.
(3) An AMOC that provides an acceptable level of safety may be
used for any repair, modification, or alteration required by this AD
if it is approved by the Boeing Commercial Airplanes Organization
Designation Authorization (ODA) that has been authorized by the
Manager, Seattle ACO, to make those findings. To be approved, the
repair method, modification deviation, or alteration deviation must
meet the certification basis of the airplane, and the approval must
specifically refer to this AD.
(4) For service information that contains steps that are labeled
as Required for Compliance (RC), the provisions of paragraphs
(h)(4)(i) and (h)(4)(ii) of this AD apply.
(i) The steps labeled as RC, including substeps under an RC step
and any figures identified in an RC step, must be done to comply
with the AD. If a step or substep is labeled ``RC Exempt,'' then the
RC requirement is removed from that step or substep. An AMOC is
required for any deviations to RC steps, including substeps and
identified figures.
(ii) Steps not labeled as RC may be deviated from using accepted
methods in accordance with the operator's maintenance or inspection
program without obtaining approval of an AMOC, provided the RC
steps, including substeps and identified figures, can still be done
as specified, and the airplane can be put back in an airworthy
condition.
(i) Related Information
For more information about this AD, contact Frank Carreras,
Aerospace Engineer, Systems and Equipment Branch, ANM-130S, FAA,
Seattle ACO, 1601 Lind Avenue SW., Renton, WA 98057-3356; phone:
425-917-6442; fax: 425-917-6590; email: [email protected].
(j) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference (IBR) of the service information listed
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this service information as applicable to do
the actions required by this AD, unless the AD specifies otherwise.
(i) Boeing Special Attention Service Bulletin 777-22-0034, dated
March 3, 2016.
(ii) Reserved.
(3) For service information identified in this AD, contact
Boeing Commercial Airplanes, Attention: Data & Services Management,
P.O. Box 3707, MC 2H-65, Seattle, WA 98124-2207; telephone: 206-544-
5000, extension 1; fax: 206-766-5680; Internet: https://www.myboeingfleet.com.
(4) You may view this service information at the FAA, Transport
Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For
information on the availability of this material at the FAA, call
425-227-1221.
(5) You may view this 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/cfr/ibr-locations.html.
Issued in Renton, Washington, on July 7, 2017.
Dionne Palermo,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2017-14929 Filed 7-20-17; 8:45 am]
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