1AD/AS 355/35 - AC Generation System

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Image unavailable in extracted text
Eurocopter AS 355 (Twin Ecureuil) Series Helicopters

AD/AS 355/35 AC Generation System 7/90 TX

Applicability: All Aerospatiale AS 355E, F, F1, F2 and N series helicopters equipped with dual AC generation systems delivered before 5 April 1990.

Requirement: Ensure correct operation of the AC power system in accordance with work card No 24.22.04.501 (updated 83.31).

Note: Aerospatiale Service Telex 01.29 refers.

Compliance: 1. Prior to the next flight scheduled under IFR conditions, or

2. For aircraft operated under VFR conditions, prior to 100 hours time in service after 2 May 1990.

3. If a printed circuit board 3 x 1 or 3 x 2 is to be fitted as a replacement part and does not bear the inspection stamp: SS 235, prior to fitment.

Background: Aerospatiale has advised that due to a diode mounting fault on printed circuit boards 3 x 1 and 3 x 2, the potential exists for a total loss of AC power.