Commonwealth legislation

AD/CESSNA 180/55 - Ammeter Type and Position

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This Act has been repealed and is no longer in force. It is retained for historical reference.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 AD requires owners/operators of Cessna 180, 182 and Wren 460 series aircraft to inspect and, if needed, rewire centre‑zero ammeters that were mistakenly tied to the alternator rather than the battery. If miswired the gauge can read zero during alternator failure while the battery is discharging, risking in‑flight electrical loss. A simple master‑on, high‑draw lamp test is provided; compliance was required within 100 flight hours after 30 Sept 1978.

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AD/CESSNA 180/55 - Ammeter Type and Position

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Cessna 180, 182 and Wren 460 Series Aeroplanes

AD/CESSNA 180/55 Ammeter Type and Position 9/78

Applicability: All models.

Requirement: 1. Inspect aircraft to ascertain if the ammeter has been modified as per Rex Drawing RA-A-1109 or if a centre zero ammeter (charge/discharge type) is connected in the alternator line.

Reconnect centre zero ammeter (charge/discharge type) into the battery line as per original Cessna wiring diagrams.

Note: This requirement can be quickly checked by switching on the battery master switch (alternator not running) and a load such as a landing light switch and noting the following:

(a) if ammeter reads below zero in the discharge sector then it is connected in the battery line.

(b) if the ammeter still reads zero when a load is applied it is quite possibly connected in the alternator line and needs to be reconnected into the battery line.

Compliance: Within the next 100 hours time in service after 30 September 1978.

Source text

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

1 AD/CESSNA 180/55 - Ammeter Type and Position