Commonwealth legislation

AD/CESSNA 400/95 - Pilots Instruments Air System

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This Airworthiness Directive requires owners/operators of Cessna 425s approved for IFR with pneumatic gyros in the left panel to install an additional air pressure regulator per Cessna SB CQB 88-9 using Service Kit SK425-41 (installation due by 31 March 1989). It prevents loss of attitude and directional gyros from regulator failure during overpressure—avoiding potentially fatal instrument loss in IMC.

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Direct links to the current provisions in AD/CESSNA 400/95 - Pilots Instruments Air System.

AD/CESSNA 400/95 - Pilots Instruments Air System

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Cessna 400 Series Aeroplanes

AD/CESSNA 400/95 Pilot’s Instruments Air System 11/88

Applicability: Models 425 equipped with pneumatic gyro instruments in the left instrument panel and approved for IFR operations.

Requirement: Action in accordance with CESSNA Service Bulletin CQB 88-9 and Service Kit SK425-41.

Compliance: Not later than 31 March 1989.

Background: The existing instrument air pressure regulator by itself is not capable of operating at high overpressure conditions and may close and shut off airflow to the attitude and directional gyros. In the event an overpressure condition failure occurs, the additional regulator installed per this AD is designed to provide reduced air pressure at an acceptable value to the inlet of the existing regulator to assist it in operating normally.

Source text

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

1 AD/CESSNA 400/95 - Pilots Instruments Air System