69-23-06: Fuel Pumps

FAA order 69-23-06 is an airworthiness directive in force since November 15, 1969. The FAA's subject line: Fuel Pumps. It names the Pratt & Whitney Canada PT6A-20, Pratt & Whitney Canada PT6A-27, Pratt & Whitney Canada PT6A-28, Pratt & Whitney Canada PT6A-6, Pratt & Whitney Canada PT6A series, Pratt & Whitney Canada PT6B-37A engines: about 436 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: engine.

What it applies to as the FAA lists it

Kind of product: Engine
Makes: Pratt & Whitney Canada Corp.
Models: PT6A-20, PT6A-27, PT6A-28, PT6A-6, PT6A-6A, PT6A-6B, PT6B-9
Engine series: Pratt & Whitney Canada PT6A-20 23 aircraft
Pratt & Whitney Canada PT6A-27 31 aircraft
Pratt & Whitney Canada PT6A-28 13 aircraft
Pratt & Whitney Canada PT6A-6 1 aircraft
Pratt & Whitney Canada PT6A series 182 aircraft
Pratt & Whitney Canada PT6B-37A 186 aircraft

Dates and paperwork

In force since: November 15, 1969
Docket: Unknown
Status: Current
The FAA's document: Read the order on the FAA's site

The order itself the regulatory text, as published

Show the full text (731 characters)

69-23-06	UNITED AIRCRAFT OF CANADA, LIMITED:  Amdt. 39-874. Applies to PT6 model series engines equipped with Pesco Model 024-800 fuel pumps as follows: 

	PT6A-6, -6A, -6B, PT6B-9 all engines 
	PT6A-20 prior to S/N PC-E22480 
	PT6A-27 prior to S/N PC-E40311 
	PT6A-28 prior to S/N PC-E50054 except 50051, 50052 

	Compliance within 50 hours after the effective date of this Airworthiness Directive unless already accomplished. 

	To prevent disengagement of the fuel pump input coupling from the engine gearbox, remove retaining ring, Pesco P/N 99-4660 and install new snap ring Pesco P/N 99-4906.  United Aircraft of Canada Ltd. Service Bulletin No. 174 pertains to this subject. 

	This amendment is effective November 15, 1969.

Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of October 5, 2026. Connections as data: /graph/directive/69-23-06.json · aircraft systems.