Hydraulic Power — Yellow Fire Shut Off Valve Grounding Wiring — Modification
- Published
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- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Airbus A350-941 aeroplanes must modify the grounding wiring of the engine fire shut off valve on both sides of the aircraft. This modification must be completed within 19 months from the effective date of 31 May 2022. The work should be performed in accordance with Airbus Service Bulletin A350-29-P017, original issue or Revision 01, or any later approved revision.
Summary
EASA Airworthiness Directive 2022-0088 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting Airbus A350-941 aeroplanes with manufacturer serial numbers from 0006 to 0044 inclusive. The directive addresses a modification related to the hydraulic power system, specifically the grounding wiring of the yellow engine fire shut off valve. It mandates changes to ensure the safety and reliability of the engine fire shut off valve wiring.
What changed
EASA Airworthiness Directive 2022-0088 introduces a required modification to the grounding wiring path of the engine fire shut off valve on both left-hand and right-hand sides of the Airbus A350-941. The modification shortens the grounding wire path routed through the wing trailing edge to reduce the risk of valve unavailability during an uncontained engine rotor failure. This is achieved by following the instructions in Airbus Service Bulletin A350-29-P017.
Why it matters
This directive is critical for aviation professionals because it addresses a potential unsafe condition that could lead to uncontrolled engine fires if the fire shut off valve becomes unavailable. Operators and maintenance organizations must ensure compliance to maintain aircraft airworthiness and safety. The modification reduces risk and enhances the reliability of the engine fire protection system, which is essential for safe flight operations.
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