Airworthiness Directive · Amendment 39-23274 · Navigation
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 Alert Requirements Bulletin B787-81205-SB340065-00 RB, Issue 001, dated February 11, 2025.
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 a report of multiple instances of loss of transponder for airplanes entering airspace in the presence of continuous wave (CW) interference where the transponder did not meet the minimum operational performance standards (MOPS) requirement for transponder response. This AD requires replacing the left and right integrated surveillance system processor unit (ISSPU) hardware. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified in paragraph (h) of this AD: At the applicable times specified in the “Compliance” paragraph of Boeing Alert Requirements Bulletin B787-81205-SB340065-00 RB, Issue 001, dated February 11, 2025, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin B787-81205-SB340065-00 RB, Issue 001, dated February 11, 2025.
Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin B787-81205-SB340065-00, Issue 001, dated February 11, 2025, which is referred to in Boeing Alert Requirements Bulletin B787-81205-SB340065-00 RB, Issue 001, dated February 11, 2025.
Where the “Boeing Recommended Compliance Time (Whichever Occurs Later)” column in the table under the “Compliance” paragraph of Boeing Alert Requirements Bulletin B787-81205-SB340065-00 RB, Issue 001, dated February 11, 2025, refers to the Issue 001 date of Requirements Bulletin B787-81205-SB340065-00 RB, this AD requires using the effective date of this AD.
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.
