Commonwealth legislation

AD/EMB-120/8 - Electrical Power Wiring

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Commonwealth

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legislative instrument

Plain English Summary

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This AD requires operators of Embraer EMB‑120 aeroplanes with serial numbers before 120280 to correct a DC Bus wiring fault per Embraer Service Bulletin No. 120‑24‑0047 (26 Feb 1993), to be done at the next scheduled Type “A” inspection after 22 July 1993.

The fix, paid for and arranged by owners/operators, addresses a faulty DC Bus 1 feed that can cause Bus 3 contactor failure, smoke and wiring overheating in the cockpit.

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AD/EMB-120/8 - Electrical Power Wiring

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Embraer EMB-120 (Brasilia) Series Aeroplanes

AD/EMB-120/8 Electrical Power Wiring 8/93

Applicability: All Embraer EMB-120 aircraft prior to serial number 120280. Requirement: Action in accordance with Embraer Service Bulletin No 120-24-0047 dated

26 February 1993.

Note: CTA (Brazil) AD 93-05-02 Amdt 39-717 refers.

Compliance: At the next scheduled Type “A” maintenance inspection after 22 July 1993.

Background: Embraer has reported the failure of the “Bus 3 Contactor” relay which was caused by a fault in the connection of a “DC Bus 1” feed wire. This failure caused smoke in the cockpit and overheating of the wiring. Compliance with this Directive will ensure that the bus is wired correctly, thus decreasing the possibility of wiring overheating and the resultant smoke and/or fire in the cockpit.

Source text

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

1 AD/EMB-120/8 - Electrical Power Wiring