Commonwealth legislation

AD/P166/8 - Emergency Electrical Bus - Modification

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

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This AD requires immediate wiring changes to the emergency electrical bus on Piaggio P166 aeroplanes with serial numbers prior to 409: add two separate feeds to the emergency bus and, where needed, an alternate cable loop so pitot heat, VHF, fire warning, stall warning and turn‑and‑bank circuits have an additional feed.

Owners/operators must arrange and pay for certificated maintenance to comply; the Civil Aviation Safety Authority issues and enforces the AD. The measure aims to increase electrical redundancy for safety‑critical systems.

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AD/P166/8 - Emergency Electrical Bus - Modification

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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 Piaggio P166 Series Aeroplanes

AD/P166/8 Emergency Electrical Bus - Modification NK

Applicability: S/Nos. prior to 409.

Document: 1. Provide two separate feeds from the main bust to the emergency bus with a common connection at the switch and separate connections at the emergency bus.

Aeroplanes not fitted with a continuous unbroken emergency bus shall be modified by providing pitot heat, VHF, fire warning, stall warning and turn the bank indicator circuits with an additional alternative cable loop between their circuit breakers and the emergency bus.

Compliance: Forthwith.

Source text

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