Fuel — Engine / Auxiliary Power Unit Low Pressure Shut-Off Valves and Auxiliary Power Unit Isolation Valve — Inspection / Replacement
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must replace all affected APU LP shut-off valves within 78 months of the effective date, and perform detailed inspections of affected engine LP SOV and APU ISOV within the same timeframe. Any valve found with discrepancies must be replaced before the next flight. Additionally, installation of any affected valves is prohibited from the effective date of 18 August 2022.
Summary
EASA Airworthiness Directive 2022-0157 is an airworthiness directive issued by EASA affecting Airbus A350-941 and A350-1041 aeroplanes. It addresses potential fuel leakage risks associated with specific low pressure shut-off valves (LP SOV) and isolation shut-off valves (ISOV) on the engine and Auxiliary Power Unit (APU). The directive mandates inspection and replacement of affected valves to ensure continued airworthiness.
What changed
This new directive introduces mandatory replacement of affected APU low pressure shut-off valves and requires a special detailed inspection of affected engine LP SOV and APU ISOV valves. If discrepancies are found during inspection, immediate replacement with serviceable parts is required. It also prohibits installation of affected valves from the effective date onward.
Why it matters
This directive is critical for aviation professionals because it addresses a safety risk caused by potential foreign object debris contamination leading to fuel leaks, which could result in uncontrolled fires and loss of aircraft control. Operators and maintenance organizations must comply to prevent hazardous conditions and ensure regulatory compliance. Failure to comply could compromise aircraft safety and regulatory approval to operate.
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