Auto Flight — Autopilot Disconnect — Modification
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of BAe 146 aeroplanes must modify the autopilot engagement circuit in accordance with Service Bulletin 22-072-36262A within 12 months of the effective date, which is 25 February 2022. The modification involves wiring changes to the autopilot system to ensure proper disconnect behavior. Stakeholders should also review related operator messages and support leaflets for additional guidance.
Summary
Civil Aviation Authority Airworthiness Directive G-2022-0002 is issued for all models and serial numbers of BAe 146 aeroplanes. This directive addresses a safety issue related to the autopilot system's disconnect logic, specifically ensuring the autopilot disconnects appropriately when manual pitch inputs or electric pitch trim switches are operated. The directive mandates a modification to the autopilot engagement circuit to enhance flight safety.
What changed
This new Airworthiness Directive introduces a required modification to the autopilot disconnect logic on BAe 146 aircraft. The modification, detailed in Service Bulletin 22-072-36262A, ensures the autopilot disengages when the electric pitch trim switch on either pilot control wheel is operated, addressing a previously identified unsafe condition. This is the first issuance of this directive and does not supersede any prior ADs.
Why it matters
This directive is critical for aviation professionals because it mitigates a potential safety hazard where the autopilot may not disengage during manual override attempts, potentially compromising flight control. Operators and maintenance organizations must ensure compliance to maintain the continuing airworthiness of affected aircraft and to meet regulatory requirements. Failure to comply could result in unsafe flight conditions and regulatory non-compliance.
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