AD/IAI-W/18 Amdt 1 - Horizontal Stabiliser Trim Actuator (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

AD/IAI-W/18 Amdt 1

Horizontal Stabiliser Trim Actuator 3/98

Applicability: Models 1124 and 1124A aircraft, all serial numbers.

Requirement 1. Action in accordance with Israel Aircraft Industries Service Bulletin 1124-27-133.

2. Overhaul and replace the Horizontal Stabiliser Trim Actuator in accordance with Israel Aircraft Industries Service Bulletin 1124-27-136.

Note 1. Replacement of the Trim Actuator in accordance with Requirement 2, constitutes terminating action for the Requirement 1 inspections of this Directive.

Note 2. Israel CAA AD 27-97-09-02 and AD 96-92 refer.

Compliance: 1. Aircraft and actuators:

- which have achieved either 6,000 landings, or 2,000 landings respectively, irrespective of whichever occurred first, within 50 hours time in service after 2 October 1996; or,

- with less than both 6,000 landings and 2,000 landings respectively, at the next inspection for maintenance release issue after 2 October 1996.

- thereafter as per the requirement of Maintenance Manual Chapter 5.

2. Unless already accomplished, before 26 August 1999.

The compliance of Requirement 1 remains unchanged from the initial issue of this directive.

This amendment becomes effective on 26 February 1998.

Background: During an inspection, an operator found one horizontal stabiliser jackscrew sheared, causing the rod end to separate from the jackscrew.

Amendment 1 is issued in response to a new CAAI AD which initiates a program for removal from service of units of expired fatigue life and of unknown history, and replacement by new, life controlled jackscrews.