AD/APU/23 - Saphir 2 Exhaust Thermal Insulation (Cth)

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 39.001(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.

Auxiliary Power Units AD/APU/23 Saphir 2 Exhaust Thermal Insulation 7/2009

Applicability: Microturbo SA Saphir 2 Model 016 Auxiliary Power Units (APUs) on which the exhaust thermal insulation has been replaced since 1 January 1995.

Note 1: These APUs are known to be installed on, but are not limited to, Dassault Falcon 20 aeroplanes. Requirement: 1. Inspect the exhaust thermal insulation for signs of deterioration.

2. Repeat the inspection detailed in Requirement 1 of this AD.

3. If deterioration is detected, replace the exhaust thermal insulation in accordance with the accomplishment instructions in Microturbo Alert Service Bulletin 49-11A76 Revision 1, dated 6 September 2007.

4. Replace the exhaust thermal insulation in accordance with the accomplishment instructions in Microturbo Alert Service Bulletin 49-11A76 Revision 1.

The use of later approved revisions of this document is acceptable for compliance with the requirements of this AD.

Note 2: EASA AD 2009-0100 dated 4 May 2009 refers. Compliance: For Requirement 1 - Within 10 APU operating hours from the effective date of this AD.