Commonwealth legislation

AD/CESSNA 550/21 - Thrust Reverser Throttle Load Limiter

In ForceCTH

Jurisdiction

Commonwealth

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legislative instrument

Plain English Summary

3/10 complexity

This airworthiness directive orders operators of specified Cessna 550 and 551 aeroplanes equipped with thrust reversers to modify the throttle load limiter per Cessna Service Bulletins. The change must be carried out within 150 flight hours of 24 June 1993. It is aimed at preventing loss of engine power control that occurred when the spring‑loaded limiter displaced during thrust‑reverser transition.

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AD/CESSNA 550/21 - Thrust Reverser Throttle Load Limiter

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Cessna 550 (Citation II) Series Aeroplanes

AD/CESSNA 550/21 Thrust Reverser Throttle Load Limiter 7/93

Applicability: Models 550 and 551 unit numbers -0002 to 0678, equipped with thrust reversers and S550 unit numbers -0001 to -0160.

Requirement: Modify in accordance with Cessna SBs 550-78-03 and S550-78-04 as applicable.

Note: FAA AD 93-05-15 refers.

Compliance: Within 150 hours time in service after 24 June 1993.

Background: There has been an incident where an attempt to advance the throttle control levers during thrust reverser transition resulted in activation of the spring loaded limiter device. Subsequent displacement of the load limiter resulted in severely reduced power control authority.

Source text

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