AD/PMC/48 - Propeller Hub Socket Retention Threads (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 - McCauley AD/PMC/48 Propeller Hub Socket Retention Threads 1/2006 DM

Applicability: McCauley Propeller Systems propeller assemblies, models 2D34C53/74E-X; D2A34C58/90AT-X; 3AF32C87/82NC-X; D3AF32C87/82NC-X; D3A32C88/82NC-X; D3A32C90/82NC-X; and 3AF34C92/ 90LF-X, with propeller hubs listed by serial number in Table 1 of this AD:

Table 1. Hub model Hub serial number C58, C34, C49, C78, C98 030725, 030726, 030727, 030728, 030729, 030730, 030748, 030749, 030750, 030751, 030752, 030753, 030754, 030755, 030756, 030757, 030758, 030759, 030760, 050403, 050407, 050408, 050410, 050475, 050477 C53 050389 C79, C90 042206, 042207, 042208 C77, C88 042201, 042202 C87 blank index, C72, C93 042239, 042524, 042527, 042528, 042529, 050071, 050073 C92, C74, C86 050866 C87 D index 050934

Note 1: Because a propeller hub can be interchanged and re-identified as a different model with the installation of different studs or adapters, any of the affected hubs could have been re-identified as a different model. Each propeller hub model listed in Table 1 of this AD is the original hub configuration when shipped from McCauley.