AD/AS 355/65 Amdt 1 - Horizontal Situation Indicator (Cth)

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/AS 355/65 and issues the following AD under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Eurocopter AS 355 (Twin Ecureuil) Series Helicopters

AD/AS 355/65 Amdt 1

Horizontal Situation Indicator 6/2004

Applicability: AS 355 helicopters Versions E, F, F1, F2 and N equipped with Bendix/King KI 525A Horizontal Situation Indicator (HSI).

Requirement: 1. Check the part number (P/N) of the KI 525A HSI installed on the helicopter. Initially, no further action is necessary if the P/N is not 066-3046-07.

2. If the P/N is 066-3046-07, modify the HSI installation in accordance with Eurocopter Alert Telex 34.00.09 paragraph 2.A.1, for helicopters with the HSI connected to a single navigation system, or paragraph 2.A.2, for helicopters with the HSI connected to at least two navigation systems.

Note 1: Modification ion accordance with Eurocopter Alert Service Bulletin (ASB) 34.00.09 is considered acceptable for compliance with Requirement 2.

3. Before installing a KI 525A HSI P/N 066-3046-07 in place of a KI 525A HSI with P/Ns 066-3046-00, -01, -04 or -05 ensure that the HSI installation is modified in accordance with Requirement 2.