Auto Flight — Autopilot Disconnect Logic — Modification
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of SAAB 2000 aeroplanes must modify the autopilot disconnect logic within 3,000 flight hours or 24 months from the effective date of 21 November 2018, whichever occurs first. The modification must be performed following the instructions in SAAB Service Bulletin 2000-22-008. Alternative methods of compliance may be approved by EASA if properly substantiated.
Summary
EASA Airworthiness Directive 2018-0240 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting all SAAB 2000 aeroplanes. It mandates a modification to the autopilot disconnect logic to enhance flight safety by ensuring the autopilot disengages correctly when pitch trim switches are operated. This directive addresses a specific safety concern related to autopilot control during flight.
What changed
EASA Airworthiness Directive 2018-0240 introduces a redesign of the autopilot disconnect logic on SAAB 2000 aeroplanes. The modification ensures that the autopilot disconnects when either of the two main pitch trim switches on each control wheel is operated. This change is implemented through wiring installation modifications as detailed in SAAB Service Bulletin 2000-22-008.
Why it matters
This directive is critical for aviation professionals because it prevents scenarios where the autopilot remains engaged without the flight crew's awareness, which could lead to loss of control of the aircraft. Operators and maintenance teams must ensure compliance to maintain aircraft safety and regulatory conformity. The modification improves the reliability of autopilot disengagement, directly impacting flight safety and operational control.
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