Commonwealth legislation

AD/CESSNA 550/22 - Outflow Safety Valve

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

CASA mandates that every Cessna 550 (Citation II) have the outflow safety valve inspected/rectified per Allied Signal Service Bulletin 103576-21-4056, to be done within 200 flight hours from 25 April 1996 or by 31 July 1996 (whichever is earlier). Owners/operators bear parts, labour and downtime; certificated maintenance organisations must perform the work and CASA enforces compliance.

The action responds to reported poppet cracking that could cause valve failure and rapid decompression, trading short‑term cost and scheduling burdens for reduced decompression risk.

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AD/CESSNA 550/22 - Outflow Safety Valve

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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 550/22 Outflow Safety Valve 5/96

Applicability: All Cessna 550 series aircraft.

Requirement: Unless previously carried out, action in accordance with Allied Signal Service Bulletin 103576-21-4056.

Note: FAA AD 95-25-10 Amdt 39-9456 refers.

Compliance: Within 200 hours time in service from 25 April 1996 or prior to 31 July 1996, whichever occurs first.

Background: The manufacturer has advised that cracking has been found in two valve poppets of a particular batch. This cracking may cause failure of the outflow safety valve which could result in rapid decompression of the aircraft.

Source text

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