AIRWORTHINESS DIRECTIVE AIRWORTHINESS DIRECTIVE

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 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.

Rotax Piston Engines

AD/ROTAX/18 Replacement of Valve Spring AD/ROTAX/18 Replacement of Valve Spring Retainers of Engines in Single Valve Spring Configuration

AD/ROTAX/18 Replacement of Valve Spring Retainers of Engines in Single Valve Spring Configuration

12/2003

d. Engines which have had the oil system d. Engines which have had the oil system opened during repair/maintenance:

d. Engines which have had the oil system opened during repair/maintenance:

Within the next 10 hours TIS.

e. Engines with more than 25 hours TIS (except those affected by (d)): At the next 100 hour inspection after the effective date of this Directive.

Rotax Piston Engines Rotax Piston Engines

Rotax Piston Engines

AD/ROTAX/18 (continued)

This Airworthiness Directive becomes effective on 27 November 2003.

Background: Due to a delay in the purging of the lubrication system during starting, it is possible that the valve spring retainers may crack due to a number of reasons outlined in the SB’s relevant to this Directive. The Austrian CAA requires replacement of the retainers with new reinforced retainers.

Jim Coyne

Delegate of the Civil Aviation Safety Authority 14 October 2003

The above AD is notified in the Commonwealth of Australia Gazette on 5 November 2003.