Commonwealth legislation

AD/AMD 50/4 - Thrust Reverser Electrical Control System

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Commonwealth

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legislative instrument

Plain English Summary

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This AD mandates a retrofit to Falcon 900 thrust-reverser electrical control logic (per Service Bulletin AMD-BA/F900/54 R2) so reverser doors commanded open on the ground remain open, preventing an automatic stow during a landing rebound that can impose abnormal loads on door linkages.

It applies to all Falcon 900s; operators/owners must complete the modification by 22 May 1990.

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AD/AMD 50/4 - Thrust Reverser Electrical Control System

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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AMD Falcon 50 and 900 Series Aeroplanes

AD/AMD 50/4 Thrust Reverser Electrical Control System 2/90

Applicability: All Falcon 900 aircraft.

Requirement: Action in accordance with Avions Marcel Dassault - Breguet. Aviation Service Bulletin AMD-BA/F900/54 R2.

Note: DGAC Airworthiness Directive 89-106-008 (B) R1 also refers.

Compliance: Prior to 22 May 1990.

Background: AMDBA advise that during landing with the thrust reverser doors ordered deployed, an automatic stow signal will be generated if a landing rebound occurs. This can cause abnormal loads on the door actuating linkages by allowing thrust to be applied to the doors whilst in stowage transit.

This AD requires modification of the thrust reverser electrical control system in order to maintain the doors open when ordered deployed on the ground.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/AMD 50/4 - Thrust Reverser Electrical Control System