Equipment / Furnishings - Flight Crew Seats - Inspection
- Published
- Effective
- Replaces
- 2024-15-03
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Boeing 777 series airplanes must continue to identify seat part and serial numbers, perform detailed inspections and repetitive checks of the HMS, and carry out any required on-condition actions. The AD is effective August 21, 2025, and comments must be submitted by September 22, 2025. Stakeholders should review the updated service bulletins and ensure compliance with the clarified credit provisions.
Summary
The Equipment / Furnishings - Flight Crew Seats - Inspection is a Federal Aviation Administration (FAA) Airworthiness Directive (AD 2025-15-09) that applies to all Boeing Company Model 777 airplanes. It addresses unsafe conditions related to the Captain's and First Officer's seats, specifically the horizontal movement system (HMS), to prevent uncommanded seat movements that could interfere with flight controls during critical phases of flight.
What changed
This AD supersedes AD 2024-15-03 and corrects an error in paragraph (j) regarding credit for previous service actions. It retains all prior inspection and on-condition requirements but clarifies which service bulletin revisions qualify for credit, ensuring operators do not omit necessary corrective actions based on seat configuration.
Why it matters
This directive is critical for aviation professionals because it ensures the safety of flight crew seating systems by preventing unexpected seat movements that could obstruct flight controls or cause unintended inputs. Compliance helps operators avoid potential flight safety hazards and regulatory penalties, while maintenance teams must verify proper inspections and corrective actions are performed according to the updated requirements.
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New ADs and bulletins for Boeing 777, summarized like this page, every Monday.