- Effective
- April 21, 2020
- Published
- March 17, 2020 · 85 FR 15056–15059
- Issued
- February 25, 2020
- Supersedes
- AD2017-15-01
- Models
- 777-200 Series, 777-200LR Series, 777-300 Series, 777-300ER Series, 777F Series
- Data sheet
- TCDST00001SE
- Registered aircraft
- 280 matched by model
- Product
- Aircraft · Large airplane
- ATA chapter
- 22 · Auto flight
- Amendment
- 39-19856
- Docket
- FAA-2019-0974
- Issued as
- Final rule
Unofficial copy from the Federal Register XML, document 2020-05362. Only the govinfo PDF is the legal edition. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| Official PDF | 236 KB | 7cea475c…cc1e731 | 2020-05362.pdf on govinfo.gov |
| Federal Register XML | 22 KB | 965bd624…6902917 | 2020-05362.xml on federalregister.gov |
| FAA DRS HTML attachment | 67 KB | 3c7c41da…68f8004 | FAA DRS (API key needed) |
| FAA DRS PDF | 83 KB | 1e8bb4e7…9fcc572 | FAA DRS (API key needed) |
On this page
Summary
The FAA is superseding Airworthiness Directive (AD) 2017-15-01, which applied to certain The Boeing Company Model 777 airplanes. AD 2017-15-01 required replacing the existing mode control panel (MCP) with a new MCP having a different part number. This AD retains the requirements of AD 2017-15-01, expands the applicability to include certain other airplanes, and adds a new requirement for certain airplanes to identify and replace the affected parts. This AD was prompted by a determination that the affected parts may be installed on airplanes outside of the original applicability of AD 2017-15-01. The FAA is issuing this AD to address the unsafe condition on these products.
The airworthiness directive
2020-04-19 The Boeing Company: Amendment 39-19856; Docket No. FAA-2019-0974; Product Identifier 2019-NM-155-AD.
(a) Effective Date
PDF page 2This AD is effective April 21, 2020.
(b) Affected ADs
PDF page 2This AD replaces AD 2017-15-01, Amendment 39-18961 (82 FR 33782, July 21, 2017) (“AD 2017-15-01”).
(c) Applicability
PDF page 2This AD applies to all The Boeing Company Model 777-200, -200LR, -300, -300ER, and 777F series airplanes, certificated in any category.
(d) Subject
PDF page 2Air Transport Association (ATA) of America Code 22, Auto flight.
(e) Unsafe Condition
PDF page 2This AD was prompted by reports of uncommanded altitude display changes in the mode control panel (MCP) altitude window. The FAA is issuing this AD to address 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
PDF page 2Comply with this AD within the compliance times specified, unless already done.
(g) New Definitions
PDF page 2(1) For the purposes of this AD, an affected part is an MCP having part number S241W001-201, S241W001-202, S241W001-251, S241W001-252, or S241W001-261.
(2) For the purposes of this AD, later-approved parts are only those parts that are approved as a replacement for the applicable part identified in Boeing Special Attention Service Bulletin 777-22-0034, dated March 3, 2016; and are approved as part of the type design by the FAA or The Boeing Company Organization Designation Authorization (ODA) after March 3, 2016 (the publication date of Boeing Special Attention Service Bulletin 777-22-0034, dated March 3, 2016).
(h) Retained Replacement of MCP With Revised Compliance Language
PDF page 2This paragraph restates the requirements of AD 2017-15-01, with revised compliance language. For airplanes identified in Boeing Special Attention Service Bulletin 777-22-0034, dated March 3, 2016, within 60 months after August 25, 2017, (the effective date of AD 2017-15-01): Do the actions specified in paragraph (h)(1) or (2) of this AD.
(1) Replace the existing MCP part with an MCP having part number S241W001-262, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-22-0034, dated March 3, 2016.
(2) Install a later-approved part as defined in paragraph (g)(2) of this AD.
(i) New MCP Identification and Replacement
PDF page 2For airplanes not identified in paragraph (h) of this AD with an original airworthiness certificate or original export certificate of airworthiness issued on or before the effective date of this AD, do the actions specified in paragraphs (i)(1) and (2) of this AD.
(1) Within 60 months after the effective date of this AD, perform a general visual inspection of the MCP to determine the MCP part number. A review of airplane maintenance records is acceptable in lieu of this inspection if the part number of the MCP can be conclusively determined from that review.
(2) If the MCP is an affected part, within 60 months after the effective date of this AD: Do the actions specified in paragraph (i)(2)(i) or (ii) of this AD.
(i) Replace the existing MCP with an MCP having part number S241W001-262, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-22-0034, dated March 3, 2016.
(ii) Install a later-approved part as defined in paragraph (g)(2) of this AD.
(j) Parts Installation Prohibition
PDF page 2As of the effective date of this AD, no person may install an MCP having part number S241W001-201, S241W001-202, S241W001-251, S241W001-252, or S241W001-261, on any airplane.
(k) Alternative Methods of Compliance (AMOCs)
PDF page 2(1) The Manager, Seattle ACO Branch, 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 certification office, send it to the attention of the person identified in paragraph (l) of this AD. Information may be emailed to: 9-ANM-Seattle-ACO-AMOC-Requests@faa.gov.
(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 Company ODA that has been authorized by the Manager, Seattle ACO Branch, FAA, 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) AMOCs approved previously for AD 2017-15-01 are approved as AMOCs for the corresponding provisions of this AD.
(5) For service information that contains steps that are labeled as Required for Compliance (RC), the provisions of paragraphs (k)(5)(i) and (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.
(l) Related Information
PDF page 2For more information about this AD, contact Frank Carreras, Aerospace Engineer, Systems and Equipment Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des Moines, WA 98198; phone and fax: 206-231-3539; email: frank.carreras@faa.gov.
(m) Material Incorporated by Reference
PDF page 2(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 this AD specifies otherwise.
(3) The following service information was approved for IBR on August 25, 2017 (82 FR 33782, July 21, 2017).
(i) Boeing Special Attention Service Bulletin 777-22-0034, dated March 3, 2016.
(ii) [Reserved]
(4) For service information identified in this AD, 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.
(5) You may view this service information at the FAA, Transport Standards Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195.
(6) 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, email fedreg.legal@nara.gov, or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html.
Rule preamble
The FAA’s background, reasoning and cost estimate, published with the AD.
DatesPage 1
This AD is effective April 21, 2020.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of August 25, 2017 (82 FR 33782, July 21, 2017).
AddressesPage 1
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 service information at the FAA, Transport Standards Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195. It is also available on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2019-0974.
For further information contactPage 2
Frank Carreras, Aerospace Engineer, Systems and Equipment Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des Moines, WA 98198; phone and fax: 206-231-3539; email: frank.carreras@faa.gov.
DiscussionPage 2
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to supersede AD 2017-15-01, Amendment 39-18961 (82 FR 33782, July 21, 2017) (“AD 2017-15-01”). AD 2017-15-01 applied to certain The Boeing Company Model 777 airplanes. The NPRM published in the Federal Register on December 13, 2019 (84 FR 68060). The NPRM was prompted by a determination that the affected parts may be installed on airplanes outside of the original applicability of AD 2017-15-01. The NPRM proposed to retain the requirements of AD 2017-15-01, expand the applicability to include those other airplanes, and add a new requirement for certain airplanes to identify and replace the affected parts. The FAA is issuing this AD to address 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.
CommentsPage 2
The FAA gave the public the opportunity to participate in developing this AD. The FAA has considered the comments received. The Air Line Pilots Association, International (ALPA) and Boeing indicated their support for the NPRM. United Airlines and FedEx had no objection to the NPRM.
ConclusionPage 2
The FAA 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. The FAA has determined that these minor changes:
• Are consistent with the intent that was proposed in the NPRM for addressing the unsafe condition; and
• Do not add any additional burden upon the public than was already proposed in the NPRM.
Related Service Information Under 1 CFR Part 51Page 2
This AD requires Boeing Special Attention Service Bulletin 777-22-0034, dated March 3, 2016, which the Director of the Federal Register approved for incorporation by reference as of August 25, 2017 (82 FR 33782, July 21, 2017). 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 CompliancePage 2
The FAA estimates that this AD affects 231 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD:
| Action | Labor cost | Parts cost | Cost per product | Cost on U.S. operators |
|---|---|---|---|---|
| Replacement (retained actions from AD 2017-15-01) | 2 work-hours × $85 per hour = $170 | Up to $5,800 * | Up to $5,970 * | Up to $1,379,070 *. |
| Inspection/records check (new proposed action) (up to 28 airplanes) | 1 work-hour × $85 per hour = $85 | $0 | $85 | Up to $2,380. |
Authority for This RulemakingPage 2
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.
The FAA is 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 findingsPage 2
The FAA has determined that 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) Will not affect intrastate aviation in Alaska, 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.
Adoption of the AmendmentPage 2
Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:
Adoption of the amendmentPage 2
1. The authority citation for part 39 continues to read as follows:
2. The FAA amends § 39.13 by removing Airworthiness Directive (AD) 2017-15-01, Amendment 39-18961 (82 FR 33782, July 21, 2017), and adding the following new AD:
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 280
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1995 | 7 |
|---|---|
| 1996 | 6 |
| 1997 | 12 |
| 1998 | 10 |
| 1999 | 28 |
| 2000 | 26 |
| 2001 | 22 |
| 2002 | 11 |
| 2003 | 5 |
| 2006 | 2 |
| 2007 | 3 |
| 2009 | 2 |
| 2010 | 4 |
| 2012 | 2 |
| 2013 | 8 |
| 2014 | 5 |
| 2015 | 2 |
| 2016 | 4 |
| 2017 | 15 |
| 2018 | 7 |
| 2019 | 9 |
| 2020 | 7 |
| 2021 | 6 |
| 2022 | 3 |
| 2023 | 7 |
| 2024 | 1 |
| 2025 | 5 |
| 2026 | 4 |
57 with no year recorded