Pratt & Whitney JT9D Airworthiness Directives

Every AD in the library whose text names the Pratt & Whitney JT9D, of which 24 are registered in the US.

25 not superseded, 10 of them with a repeat action. 32 listed in all, newest published April 22, 2021.

Published sinceHide 7 supersededOnly repeat actions25 of 32

2009-04-18Requires initial and repetitive borescope inspections of the 2nd stage high-pressure turbine (HPT) rotor and stator assemblyPratt & Whitney (PW) JT9D-7 Series Turbofan Engines · EngineRepeat actionMar 31, 2009
2001-17-30Pratt & Whitney JT9D-7R4 Series Turbofan EnginesEngineRepeat actionAug 30, 2001
98-21-22 R1Pratt & Whitney JT9D Series Turbofan EnginesEngineRepeat actionNov 19, 1999
99-20-04Requires an initial and repetitive inspections of certain High Pressure Turbine (HPT) stage 1 and stage 2 disks utilizing an improved ultrasonic inspection method performed at an approved facility when the disks are...Pratt & Whitney JT9D-7R4 Series Turbofan Engines · EngineRepeat actionSep 24, 1999
99-15-02Requires initial and repetitive in-shop eddy current and on-wing ultrasonic inspections of the Combustion Chamber Outer Casing (CCOC) forward flange (L-flange) fillet radius for cracking, and replacing cracked...Pratt & Whitney JT9D Series Turbofan Engines · EngineRepeat actionJul 16, 1999
99-14-08Pratt & Whitney JT9D Series Turbofan EnginesEngineSupersedes 94-10-09Repeat actionJul 13, 1999
99-11-09Pratt & Whitney JT9D Series Turbofan EnginesEngineSupersedes 94-26-06Repeat actionMay 26, 1999
98-21-22Requires initial and repetitive eddy current inspections (ECI) of 14th and 15th stage high pressure compressor (HPC) disks for cracks, and removal of cracked disks and replacement with serviceable partsPratt & Whitney JT9D Series Turbofan Engines · EngineRepeat actionOct 16, 1998
97-25-10 R1Pratt & Whitney JT9D Series Turbofan EnginesEngineRepeat actionJul 14, 1998
97-25-10Pratt & Whitney JT9D Series Turbofan EnginesEngineSupersedes 91-04-10Repeat actionDec 8, 1997
2021-09-10Requires revising the required inspections of selected critical life-limited parts specified in the ALS of the manufacturer's ICA and, for air carriers, to the existing continuous airworthiness air carrier...Turbine engine compressor section · EngineSupersedes 2012-04-15Apr 22, 2021
2012-06-14Requires removing them from service using a drawdown schedulePratt & Whitney (PW)Turbofan Engines · EngineMar 23, 2012
2011-25-10Requires removing certain HPC shafts before their certified life limits and establishes a new, lower life-limit for these partsPratt & Whitney Corp. (PW) JT9D-7R4H1 Turbofan Engines · EngineDec 12, 2011
2007-18-06Requires the same actions but corrects 12 P/Ns, adds 10 part SNs, and adds the definition of next fan blade exposure to the compliance sectionPratt & Whitney JT9D-7R4 Turbofan Engines · EngineSupersedes 2005-26-09Aug 31, 2007
2007-17-21Requires removing reduced cooling flow 2nd stage high pressure turbine (HPT) vane assemblies, part numbers (P/Ns) 797282, 796972, 800082, 800072, 803182, 803282, and 822582, installed in 2nd stage HPT vane cluster...Pratt & Whitney (PW) JT9D-7R4 Series Turbofan Engines · EngineAug 24, 2007
2005-05-13Requires replacing each existing HPT second stage airseal with an improved design HPT second stage airseal and modifying the 2nd stage HPT vane cluster assembly and 1st stage retaining blade HPT plate assembly at...Pratt & Whitney JT9D-59A, -70A, -7Q, and -7Q3 Turbofan Engines · EngineSupersedes 2002-10-07Mar 10, 2005
2004-10-01Requires their removal from service before accumulating 15,000 cycles-since-new (CSN)Pratt & Whitney JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, -20, and -20J Turbofan Engines · EngineMay 11, 2004
2004-01-08Pratt & Whitney JT9D-7R4 Series Turbofan EnginesEngineJan 6, 2004
2003-24-12Requires a one-time visual inspection of the gearbox pressure tube and NoPratt & Whitney JT9D-3A, -7, -7A, -7F, -7H, -7AH, and -7J Turbofan Engines · EngineDec 3, 2003
2002-07-04Pratt & Whitney JT9D-7R4 Series Turbofan EnginesEngineApr 9, 2002
2000-23-14Pratt & Whitney JT9D Series Turbofan EnginesEngineNov 20, 2000
98-23-07 R1Pratt & Whitney JT9D Series Turbofan EnginesEngineJul 30, 1999
99-04-05Requires removing the diffuser case from service and replace with a serviceable partPratt & Whitney JT9D Series Turbofan Engines · EngineFeb 11, 1999
98-23-07Requires a one-time acid etch inspection of the turbine exhaust case (TEC) wall between and on either side of the ``R'' and ``S'' rails in the engine mount lug area (top quadrant of the case) for the presence of weld...Pratt & Whitney JT9D Series Turbofan Engines · EngineNov 13, 1998
96-17-11Requires replacement of 3rd, 4th, and 5th stage low pressure turbine (LPT) vane retention bolts and nuts, the removal of the 5th stage vane configuration which includes an electro-discharge machined (EDM) slot and...Pratt & Whitney JT9D-7R4 Series Turbofan Engines · EngineSep 17, 1996

Listed by the model designations in each AD's text. An AD written for a part number, or for "all" engines of a maker, may name no model and so not appear here: search the library for the part or the maker as well.