AD/IAI-W/23 - Brake System Hydraulic Fuse (Cth)

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

Israel Aircraft Industries 1123 and 1124 (Westwind) Series Aeroplanes

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 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.

AD/IAI-W/23 Brake System Hydraulic Fuse 7/2001

Applicability: Israel Aircraft Industries Ltd. (IAI) 1121, 1121A, 1121B, 1123, 1124 and 1124A series aircraft.

Requirement: 1. Perform a functional test (by measuring fluid loss) for proper operation of hydraulic fuses installed in brake system and emergency hydraulic indicating system in accordance with one of the following, as applicable to the aircraft:

(a) Commodore Jet Service Bulletin (SB) 1121-29-022 for Model 1121, 1121A and 1121B series aeroplanes.

(b) Westwind SB 1123-29-045 for Model 1123 series aeroplanes.

(c) Westwind SB 1124-29-132 for Model 1124 and 1124A series aeroplanes.

If during the inspection required by paragraph 1(a) to 1(c), any discrepancy is found, replace the fuse with a new, improved fuse part number 713047 with suffix "A" after the serial number, prior to further flight.