EASA AD 2021-0106: Hydraulic Power — Fire Shut-Off Valves — Inspection

What to do

Operators must perform a one-time detailed inspection of all affected fire shut-off valves within 1000 flight hours or 12 months from 29 April 2021, whichever occurs first. If any actuator is found to rotate improperly, the valve must be replaced with a serviceable unit before the next flight. Inspection results, including no findings, must be reported to Airbus within 30 days after inspection completion.

Summary

EASA Airworthiness Directive 2021-0106 is an official safety directive addressing hydraulic power fire shut-off valves on Airbus A300, A310, A300-600, and A300-600ST aeroplanes. It mandates inspection of fire shut-off valves installed on the wings to detect incorrect actuator installation that could cause valve failure. The directive applies to all certified models and manufacturer serial numbers of these aircraft types.

What changed

This new directive introduces a one-time detailed inspection requirement for the fire shut-off valves' actuators to ensure they are correctly installed and do not rotate around their pivot axis. It also updates torque values for actuator installation as per Collins FSOV Component Maintenance Manual issue 6. Additionally, it requires replacement of any faulty valve before further flight and mandates reporting inspection results to Airbus.

Why it matters

This directive is critical for aviation professionals because incorrect installation of fire shut-off valve actuators can lead to valve failure, risking uncontrolled engine fires and potential damage or loss of control of the aircraft. Operators and maintenance teams must ensure compliance to maintain aircraft airworthiness and safety. Timely inspections and corrective actions help prevent serious safety incidents and regulatory non-compliance.

What to do

Summary

What changed

Why it matters

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