AD/T53/23 - Combustion Chamber Housings (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.

AlliedSignal (Lycoming) Turbine Engines - T53 Series AD/T53/23 Combustion Chamber Housings 10/2009

Applicability: Honeywell International Inc. T5313B, T5317A, T5317A-1, T5317B, and T5317BCV turboshaft engines with combustion chamber housing (CCH), part numbers (P/Ns) 1-130-610-05, 1-130-610-12, and 1-130-610-17, installed.

Note 1: These engines are installed on, but not limited to, Bell 205 and 210 Series and Kaman K-1200 helicopters. Requirement: 1. For CCH, P/N 1-130-610-05 and 1-130-610-12, inspect the area between points A and B around the entire housing circumference in Figure 1 of this AD for weld repairs and cracks.

2. If as a result of the Requirement 1 inspection:

a. Any cracks are found - replace the CCH.

b. If any weld repairs are found - replace the CCH.

Honeywell International Inc. Alert Service Bulletin (ASB) T53-A0142, Revision 1, dated 14 September 2006, contains additional guidance on replacing the CCH.

3. For CCH, P/N 1-130-610-05 and 1-130-610-12, inspect the area between points A and B around the entire housing circumference in Figure 1 of this AD for cracks.