COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Pratt and Whitney Canada Turbine Engines - PT6A Series
AD/PT6A/23 Replacement of Compressor Delivery Heated
Air Tube by a Non-Metallic Hose
10/85
Applicability: PT6A-11AG engines with S/Nos. prior to PC-E10139. PT6A-15AG engines with S/Nos. prior to PC-E14012.
Document: 1. Pratt & Whitney Aircraft of Canada Ltd. SB No. 12024 R1, or
2. AD/UAC-T/38.
Compliance: At first opportunity consistent with availability of parts but not later than next HSI or next overhaul whichever is sooner.
Background: Overseas, failures of the rigid compressor delivery heated air tubes have occurred.
This Directive is issued in order to preclude further failures.