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FAA Proposes Airworthiness Directive for Boeing 787-8 Cargo Door Frames After Material Non-Conformance Report

The FAA has issued a proposed rule requiring inspection of large forward cargo door split frames on certain Boeing 787-8 airplanes after a supplier could not confirm that the correct titanium alloy was used in manufacturing.

2 min read Synthesized & fact-checked by The General Plan

The Proposed Action

The Federal Aviation Administration has issued a notice of proposed rulemaking (NPRM) to adopt a new airworthiness directive (AD) for certain Boeing Company Model 787-8 airplanes, targeting large forward cargo door (LFCD) split frames that may have been manufactured with material that did not conform to type design. The proposed AD would require an inspection of the LFCD split frames for affected batch numbers and applicable on-condition actions, including, where necessary, replacing each affected LFCD split frame with a new one made of Ti-6Al-4V alloy material. The proposed rule affects 14 CFR Part 39.

Background and Unsafe Condition

According to the document, Boeing informed the FAA that it received a notice of escapement (NOE) from a supplier indicating that LFCD split frames on certain airplanes may have been manufactured with material that did not conform to type design. The sub-tier supplier of the material for these frames did not have the records necessary to show that the type design–specified Ti-6Al-4V alloy material was used to manufacture the frames.

The FAA explains that use of a material other than that specified by type design could result in the inability of a principal structural element (PSE) to sustain limit load and failure of the passenger floor beam to frame attachment. The agency states this could result in injury or impeded egress for passengers and crew in a rapid cabin decompression event. The FAA determined that this unsafe condition is likely to exist or develop on other products of the same type design.

Mechanism and Compliance

The FAA reviewed Boeing Alert Requirements Bulletin B787-81205-SB530106-00 RB, Issue 001, dated February 4, 2026, which specifies the procedures for inspecting the LFCD split frames for affected batch numbers and applicable on-condition actions. The proposed AD would require accomplishing the actions specified in that bulletin, except for any differences identified as exceptions in the regulatory text of the proposed AD. The FAA estimates that the proposed AD, if adopted, would affect 4 airplanes of U.S. registry. The docket is identified as FAA-2026-8784; Project Identifier AD-2026-00202-T.

What to Watch

The FAA must receive comments on this proposed AD by October 5, 2026. Comments should reference Docket No. FAA-2026-8784 and Project Identifier AD-2026-00202-T. The FAA states it will consider all comments received by the closing date and may amend the proposal as a result. Confidential Business Information submitted in response to the NPRM should be sent separately to the designated Aviation Safety Engineer at the FAA's Des Moines, Washington office and must be clearly marked "PROPIN" on each page.

Related

Sources

15 cited

Every hard fact above is grounded in and cited to a primary source record.

  1. The FAA issued a notice of proposed rulemaking (NPRM) to adopt a new airworthiness directive for certain Boeing Company Model 787-8 airplanes.

    federalregister.gov

  2. The proposed AD was prompted by a report that large forward cargo door (LFCD) split frames may have been manufactured with a material that did not conform to type design.

    federalregister.gov

  3. The proposed AD would require an inspection of the LFCD split frames for affected batch numbers and applicable on-condition actions.

    federalregister.gov

  4. On-condition actions include replacing each affected LFCD split frame with a new LFCD split frame made of Ti-6Al-4V alloy material.

    federalregister.gov

  5. The proposed rule affects 14 CFR Part 39.

    federalregister.gov

  6. Boeing informed the FAA that it received a notice of escapement (NOE) from a supplier indicating that LFCD split frames on certain airplanes may have been manufactured with material that did not conform to type design.

    federalregister.gov

  7. The sub-tier supplier of the material for these frames did not have the records necessary to show that the type design specified Ti-6Al-4V alloy material was used to manufacture the frames.

    federalregister.gov

  8. Use of a material other than specified by type design could result in the inability of a principal structural element (PSE) to sustain limit load and failure of the passenger floor beam to frame attachment.

    federalregister.gov

  9. The FAA states the unsafe condition could result in injury or impeded egress for passengers and crew in a rapid cabin decompression event.

    federalregister.gov

  10. The FAA determined that the unsafe condition is likely to exist or develop on other products of the same type design.

    federalregister.gov

  11. The FAA reviewed Boeing Alert Requirements Bulletin B787-81205-SB530106-00 RB, Issue 001, dated February 4, 2026.

    federalregister.gov

  12. The FAA estimates that the proposed AD, if adopted as proposed, would affect 4 airplanes of U.S. registry.

    federalregister.gov

  13. The docket is identified as FAA-2026-8784; Project Identifier AD-2026-00202-T.

    federalregister.gov

  14. The FAA must receive comments on this proposed AD by October 5, 2026.

    federalregister.gov

  15. Confidential Business Information submitted in response to the NPRM should be sent to Joseph Hodgin, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198.

    federalregister.gov

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