EASA AD 22-027
WITHDRAWN - EXPLANATORY STATEMENT ATTACHED
Summary
EASA Withdrawal Statement for Proposed AD 22-027 announces the withdrawal of the proposed airworthiness directive concerning the Airbus A350 flight control system. The withdrawal follows the discovery of incorrect instructions related to the PRIM P13 standard software in the Flight Control and Guidance System X13 standard, which is embodied through Airbus Service Bulletin A350-42-P017. An updated PRIM software standard is under development, and a new AD is expected to be issued for its installation.
What Changed
The Proposed AD 22-027 has been withdrawn and will not be implemented. Instead, EASA issued Emergency AD 2022-0079-E imposing operational restrictions on aircraft with the affected software embodied. A future AD will mandate installation of a major software update including the corrected PRIM software standard.
Why It Matters
This withdrawal is important for operators and maintenance organizations of Airbus A350 aircraft as it affects compliance and operational procedures related to the flight control system software. The current Emergency AD imposes operational restrictions, and stakeholders must prepare for the upcoming AD requiring a significant software update. Understanding these changes helps ensure continued airworthiness and regulatory compliance.
What To Do
Operators and maintenance teams should comply with the restrictions outlined in Emergency AD 2022-0079-E for aircraft with Airbus SB A350-42-P017 embodied. They should monitor EASA communications for the forthcoming AD mandating the updated PRIM software installation and plan for its implementation once published. No immediate action is required regarding the withdrawn Proposed AD 22-027.
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