AD/PHS/23 - Blade Spar Corrosion (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 - Hamilton Standard AD/PHS/23 Blade Spar Corrosion 7/2006 TX

Applicability: Hamilton Sundstrand (formerly Hamilton Standard Division) model 14RF-9 propellers with propeller blades of the "+E'' repair configuration (excludes "+E2'' repair configuration) having serial numbers (SNs) below 885751.

Note 1: These propellers are installed on, but not limited to, Embraer 120 aeroplanes.

Note 2: The "+E'' blade marking can be found on the blade airfoil or stamped on the blade shank, adjacent to the blade and pin assembly part number.

Note 3: If the blade is stamped with "+E2'' no further action is required. Requirement: 1. Initial Inspection of Installed Blades Not Previously Inspected

For installed blades not previously inspected using Hamilton Sundstrand Alert Service Bulletin (ASB) No. 14RF-9-61-A143, dated 21 November 2005; or Revision 1, dated 5 December 2005; or ASB No. 14RF-9-61-A144, dated 27 February 2006; or ASB No. 14RF-9-61-A145, dated 13 April 2006; or ASB No. 14RF-9-61-146, dated 3 April 2006, perform initial visual, feeler gage, and tap test inspections for delamination in accordance with paragraph 3 of the Accomplishment Instructions of Hamilton Sundstrand ASB No. 14RF-9-61-A145.