Commonwealth legislation

AD/PA-23/42 Amdt 1 - Alternator Field Fuse - Installation

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

3/10 complexity

This directive mandates a safety modification for certain Piper PA-23-250 (Apache/Aztec) aircraft with a voltage-regulator selector switch: install 3‑amp fuses in the alternator “F” circuits, then test and set the alternator/voltage regulators per the manufacturer’s manual. It affects owners/operators of specified serial-numbered aircraft and must be done forthwith. The fuses need not be pilot‑accessible during flight.

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Current sections

Direct links to the current provisions in AD/PA-23/42 Amdt 1 - Alternator Field Fuse - Installation.

AD/PA-23/42 Amdt 1 - Alternator Field Fuse - Installation

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Piper PA-23 (Apache and Aztec) Series Aeroplanes

AD/PA-23/42

Amdt 1

Alternator Field Fuse - Installation 4/79

Applicability: Model PA-23-250 with S/Nos. 27-2505 and subsequent fitted with a voltage regulator selector switch.

Requirement: 1. In aircraft S/No. 27-2505 to 27-3836 and 27-3838 to 27-3943, install a 3 amp fuse in each field circuit between the “F” field terminal on the alternator and the alternator main circuit breaker. (i.e. Cable PF5 and in cable PF 11).

2. In aircraft S/Nos. 27-3837 and 27-3944 and subsequent, install a 3 amp fuse in each field circuit between the “F” field terminal on the alternator and the voltage regulator selector switch (i.e. cable PF17A and in cable PF18A).

Note: It is not necessary for these fuses to be accessible in flight.

3. Functionally check the alternator system and the adjustment of the voltage regulators as per the manufacturer’s service manual.

Compliance: Forthwith.

Source text

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

1 AD/PA-23/42 Amdt 1 - Alternator Field Fuse - Installation