AD/PR/39 - Propeller Blade Outer Sleeve (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.

Propellers - Variable Pitch - Dowty Rotol AD/PR/39 Propeller Blade Outer Sleeve 8/2008

Applicability: Dowty Propellers (part of GE Aviation Systems) Models R354/4-123-F/13, R354/4-123-F/20, R375/4-123-F/21, R389/4-123-F/25, R389/4-123-F/26 and R390/4-123-F/27 propellers.

Note 1: These propellers are known to be installed on but may not limited to SAAB SF340A and 340B aircraft. Requirement: 1. Inspect the blade outer sleeves for cracks in accordance with Dowty Propellers Alert Service Bulletin No. SF340-61-A106 or later NAA approved revision.

2. If during any inspection as detailed in Requirement 1 of this AD, a visual indication of a crack on the outer sleeve is found, replace the affected propeller blade with an airworthy unit.

Replacement of the blade does not constitute terminating action for the inspection requirements of this AD.

Note 2: EASA AD 2008-0033 dated 19 February 2008 refers. Compliance: For Requirement 1: At the next scheduled 1,600 Flight Hours (FH) aircraft check after the effective date of this AD, or after any blade accumulates 15,000 FH time in service, whichever occurs later, and thereafter at intervals not to exceed 1,600 FH.