Airworthiness Directive · Amendment 39-23156 · Equipment/furnishings
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 787-8, 787-9, and 787-10 airplanes, certificated in any category, as identified in Boeing Special Attention Requirements Bulletin B787-81205-SB250302-00 RB, Issue 001, dated August 21, 2024, except for airplanes identified as Group 3, Configuration 1; and Group 4, Configuration 3 airplanes.
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 787-8, 787-9, and 787-10 airplanes. This AD was prompted by reports of corrosion on one or more of the eight lower fitting assemblies and adjacent lavatory components on certain lavatories. This AD requires a detailed inspection of the lower fitting assemblies and the centerline partition threshold of the lavatories for corrosion, recording on the modification record placard, and applicable on-condition actions. This AD also requires revising the existing maintenance program to incorporate a detailed inspection of the lavatory vertical side forward fittings for corrosion or damage. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified by paragraph (h) of this AD: At the applicable times specified in the “Compliance” paragraph of Boeing Special Attention Requirements Bulletin B787-81205-SB250302-00 RB, Issue 001, dated August 21, 2024, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Special Attention Requirements Bulletin B787-81205-SB250302-00 RB, Issue 001, dated August 21, 2024.
Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Special Attention Service Bulletin B787-81205-SB250302-00, Issue 001, dated August 21, 2024, which is referred to in Boeing Special Attention Requirements Bulletin B787-81205-SB250302-00 RB, Issue 001, dated August 21, 2024.
(1) Where the “Effectivity” paragraph and the Boeing Recommended Compliance Time columns of the tables in the “Compliance” paragraph of Boeing Special Attention Requirements Bulletin B787-81205-SB250302-00 RB, Issue 001, dated August 21, 2024, refer to the Issue 001 date of Requirements Bulletin B787-81205-SB250302-00 RB, this AD requires using the effective date of this AD.
(2) Where the Boeing Recommended Compliance Time columns of the tables in the “Compliance” paragraph of Boeing Special Attention Requirements Bulletin B787-81205-SB250302-00 RB, Issue 001, dated August 21, 2024, for Condition 1, Action 1 and Action 2; and Condition 2, Action 2 and Action 3, specify modifying the record placard and incorporating Maintenance Review Board Report (MRBR) Item Number 25-185-00 “Before further flight”, this AD requires replacing that text with “Within 90 days”.
(3) Where Boeing Special Attention Requirements Bulletin B787-81205-SB250302-00 RB, Issue 001, dated August 21, 2024, specifies contacting Boeing for repair instructions, this AD requires doing the repair using a method approved in accordance with the procedures specified in paragraph (k) of this AD.
(4) Where the Method of Compliance columns in the “Accomplishment Instructions” paragraph of Boeing Special Attention Requirements Bulletin B787-81205-SB250302-00 RB, Issue 001, dated August 21, 2024, specifies doing a detailed inspection using “Paragraph 3.A. step (3)”, this AD requires replacing that text with “Paragraph 3.A. step (3) and step (4), as applicable”.
After the existing maintenance program has been revised as required by paragraph (g) of this AD, no alternative actions (e.g., inspections) or intervals may be used unless the actions or intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (k) of this AD.
For airplane lavatories with no previous repairs on which MRBR Item Number 25-185-00 was accomplished before the effective date of this AD, the inspection required by paragraph (g) of this AD is not required.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
