# Pratt & Whitney JT3D-7A

- Type: Engine model (FAA registry)
- Registry code: 51689
- Manufacturer (registry): P & W
- Model: JT3D-7A
- Engine type: Turbo-fan
- Power: 19,285 lb thrust
- Data sheet: [TCDS 1E8](https://openairdocs.org/tcds/1E8) (OpenAirDocs)
- Holder: Pratt & Whitney Division
- Installed in: 0 registered aircraft
- Page: https://openairdocs.org/engine/pratt-whitney-jt3d-7a

Model codes come from the FAA registry's reference file.

## ADs that may apply (OpenAirDocs)

Matched to this engine model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

- [AD 99-01-08](https://openairdocs.org/ad/99-01-08): Stage 7 through Stage 15 High-Pressure Compressor (HPC) Disks · Pratt & Whitney Division JT3D-1, JT3D-1-MC6, JT3D-1-MC7 and 30 more. Effective Jan 5, 1999
- [AD 96-23-10](https://openairdocs.org/ad/96-23-10): Steel High Pressure Compressor (HPC) disk · Pratt & Whitney Division JT3D-1, JT3D-1-MC6, JT3D-1-MC7 and 8 more. Effective Jan 21, 1997
- [AD 82-14-02](https://openairdocs.org/ad/82-14-02): Third Stage Turbine Disks · Pratt & Whitney Division JT3D-1, JT3D-1-MC6, JT3D-1-MC7 and 9 more. Effective Jul 1, 1982
- [AD 80-12-51 R2](https://openairdocs.org/ad/80-12-51-R2): First Stage Fan Blade · Pratt & Whitney Division JT3D-1, JT3D-1-MC6, JT3D-1-MC7 and 9 more. Effective Jul 1, 1980
- [AD 78-11-03](https://openairdocs.org/ad/78-11-03): First Stage Fan Blades · Pratt & Whitney Division JT3D-1, JT3D-1-MC6, JT3D-1-MC7 and 9 more. Effective Aug 10, 1978
- [AD 74-15-05](https://openairdocs.org/ad/74-15-05): Compressor Discs · Pratt & Whitney Division JT3D-1, JT3D-1-MC6, JT3D-1-MC7 and 9 more. Effective Jul 25, 1974
- [AD 64-05-05](https://openairdocs.org/ad/64-05-05): Throttle Valve Assemblies · Pratt & Whitney Division JT3C-12, JT3C-7, JT3D-1 and 17 more. Effective Feb 27, 1964
- [AD 56-06-02](https://openairdocs.org/ad/56-06-02): Cylinder Flange Attaching Stud · Pratt & Whitney Division Double Wasp CA15, Double Wasp CA17, Double Wasp CA18 and 115 more

## Registered aircraft

None registered with this engine model now.

## NTSB investigations

None matched to aircraft with this engine model.

## FAA accident and incident reports

None matched to aircraft with this engine model.

## Service difficulty reports (7)

As reported by operators and repair stations, by the model named in the report.

- [SDR ARWA20061001](https://openairdocs.org/sdr/ARWA20061001), Oct 8, 2006: COMPRESSOR. STALLED. LOG PAGE NR 124562. ABORTED TAKEOFF AT 105 KTS FOLLOWING NR 4 ENGINE COMPRESSOR STALL. INSPECTED NR 4 ENGINE COMPRESSOR SURGE BLEED VALVE AND TIGHTEN ALL SENCE 
- [SDR IXXA060436O](https://openairdocs.org/sdr/IXXA060436O), Jun 18, 2006: PRBC. MALFUNCTIONED. DURING TAKE-OFF FROM LPLA NUMBER 3 ENGINE DID NOT ACHIEVE TAKE-OFF POWER. THE CREW REJECTED THE TAKE-OFF AT 100 KNOTS AND RETURNED TO BLOCKS. MAINTENANCE FOUND 
- [SDR ARWA20050201](https://openairdocs.org/sdr/ARWA20050201), Feb 2, 2005: FUEL CONTROL. FAILED. ON TAKEOFF, LOSS ENGINE OIL PRESSURE PRIOR TO V-1 ABORTED TAKEOFF; ALSO NOTICED COMPRESSOR STALLED. TROUBLESHOOTING FOUND NR 4 ENGINE FUEL CONTROL UNIT (FCU) LE
- [SDR ARWA20040505](https://openairdocs.org/sdr/ARWA20040505), May 13, 2004: BLADE. DAMAGED. NR 2 ENGINE EGT (EXHAUST GAS TEMPERATURE) IS 40 DEGREES HIGHER THAN OTHER ENGINES IN CRUISE. ALL OTHER PARAMETERS NORMAL. ON POST-FLIGHT INSPECTION, NR 2 ENGINE
- [SDR IXXA0300011O](https://openairdocs.org/sdr/IXXA0300011O), Feb 4, 2003: ENGINE. WORN. AFTER DEPARTURE FROM KBFI ENROUTE TO KPDX CREW NOTICED OIL QUANTITY IN NUMBER 2 ENGINE DROPPED ABNORMALLY. AS A PRECAUTIONARY MEASURE THE #2 ENGINE WAS SHUTDOWN
- [SDR IXXA96165](https://openairdocs.org/sdr/IXXA96165), Nov 13, 1996: COMPRESSOR. STALLED. AFTER TAKEOFF FROM TOL, NR 4 ENGINE EXPERIENCED A COMPRESSOR STALL, THE FLIGHT RETURNED TO TOL. MAINTENANCE TROUBLESHOT THE EPR SYSTEM, INTERSTAGE BLEED VALVE, 
- [SDR IXXA96158](https://openairdocs.org/sdr/IXXA96158), Sep 24, 1996: ENGINE. FLAMED OUT. ON CLIMB-OUT FROM BNA TO TOL, THE NR 1 ENGINE FLAMED OUT. THE IGNITORS WERE SELECTED FOR 'BOTH' AND A SUCCESSFUL RESTART WAS ACCOMPLISHED. THE AIRCRAFT CONTINUE

## STCs that may be installed (OpenAirDocs) (2)

Approved for this engine model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [STC SE01110AT](https://openairdocs.org/stc/SE01110AT): Remove and replace JT3D main accessory gearbox housing split line gasket with PTM International gasket. Jet Avion Corporation. Lists JT3D Series
- [STC SE1WE](https://openairdocs.org/stc/SE1WE): Valve assembly 126495. Limited to those engines having serial number suffix 'B'. Telecomputing Corp. Lists JT3D Series

## PMA parts (OpenAirDocs) (115, first 50)

Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this engine model on its data sheet, so check the FAA record before relying on it. Newest first.

- [DEC01- 039-501](https://drs.faa.gov/browse/excelExternalWindow/5A5B9C31B2BCC0F586258629005AC1D4.0001): Lever - Pressure Ratio Bleed Control. Turbine Kinetics Inc, A HEICO Aerospace Company · PMA PQ0816NE · Replaces 393909 · Nov 16, 2020
- [234343WE](https://drs.faa.gov/browse/excelExternalWindow/CD3FA19ECE38FEA3862582280078870C.0001): Washer, Convex. Wencor LLC · PMA PQ1370NM · Replaces 234343 · Nov 19, 2017
- [261158WE](https://drs.faa.gov/browse/excelExternalWindow/AED69A74030D17B9862582280078872D.0001): Seal-Main Bearing. Wencor LLC · PMA PQ1370NM · Replaces 210991 · Nov 19, 2017
- [235242WE](https://drs.faa.gov/browse/excelExternalWindow/89918F33A9B6A260862582280078870E.0001): Nut-Plain, Hex 0.3125-32 x 0.135. Wencor LLC · PMA PQ1370NM · Replaces 235242 · Nov 19, 2017
- [261159WE](https://drs.faa.gov/browse/excelExternalWindow/5C375ECB2569DA12862582280078872E.0001): Seal-Main Bearing. Wencor LLC · PMA PQ1370NM · Replaces 210992 · Nov 19, 2017
- [DEC01-039-501](https://drs.faa.gov/browse/excelExternalWindow/1F7357D807CA9B4286257F9A004D904E.0001): Lever  Pressure Ratio Bleed Control. Turbine Kinetics Inc, A HEICO Aerospace Company · PMA PQ0816NE · Replaces 393909 · Mar 29, 2016
- [468991WE](https://drs.faa.gov/browse/excelExternalWindow/54307786E4DF3D2586257CD700663B02.0001): Rivet, Blade. Wencor LLC · PMA PQ1370NM · Replaces 468991 · May 8, 2014
- [468990WE](https://drs.faa.gov/browse/excelExternalWindow/385B385F455DDCA486257CD700663AA6.0001): Rivet, Blade. Wencor LLC · PMA PQ1370NM · Replaces 468990 · May 8, 2014
- [387316WE](https://drs.faa.gov/browse/excelExternalWindow/2347EFB2FC7D6D0986257CD700660818.0001): Rivet, Blade. Wencor LLC · PMA PQ1370NM · Replaces 387316 · May 8, 2014
- [P53684](https://drs.faa.gov/browse/excelExternalWindow/3B29DAF13B8411A586257BC7004C3B11.0001): Seal Assembly. Eaton Aerospace, Conveyance Systems Division Centurion  Mechanical Seals · PMA PQ0558NE · Replaces 715603 · Aug 7, 2013
- [ST1594-04WE](https://drs.faa.gov/browse/excelExternalWindow/A79DD9AB093383BA862579E30065A265.0001): Clamp-Loop, Cushion. Wencor LLC · PMA PQ1370NM · Replaces ST1594-04 · Apr 4, 2012
- [468991WE](https://drs.faa.gov/browse/excelExternalWindow/E4C8301AFA6A6DE8862576E40068FA50.0001): Rivet, Blade. Wencor LLC · PMA PQ1370NM · Replaces 468991 · Feb 2, 2010
- [468990WE](https://drs.faa.gov/browse/excelExternalWindow/E3BA7577C2BE0B97862576E40068FA1F.0001): Rivet, Blade. Wencor LLC · PMA PQ1370NM · Replaces 468990 · Feb 2, 2010
- [800144WE](https://drs.faa.gov/browse/excelExternalWindow/6DACD434E8C0C925862576E7005B8C68.0001): Seal-Face #4 1/2 Bearing. Wencor LLC · PMA PQ1370NM · Replaces 786520 · Feb 2, 2010
- [192532WE](https://drs.faa.gov/browse/excelExternalWindow/4D0F5F14C83F108C86257E2E005D35A4.0001): Seal-Drain Valve. Wencor LLC · PMA PQ1370NM · Replaces 192532 · Feb 2, 2010
- [227433WE](https://drs.faa.gov/browse/excelExternalWindow/3FAF5553D51BC40F86257E2E005D3556.0001): Seal-1.000 O.D. Tube. Wencor LLC · PMA PQ1370NM · Replaces 227433 · Feb 2, 2010
- [387316WE](https://drs.faa.gov/browse/excelExternalWindow/23BC05B77EB56EA5862576E40068E17D.0001): Rivet, Blade. Wencor LLC · PMA PQ1370NM · Replaces 387316 · Feb 2, 2010
- [PT100002](https://drs.faa.gov/browse/excelExternalWindow/32E03DDD1C6A47D086257284005E80AF.0001): Gear Box Cover Seal. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 755125 · Nov 20, 2006
- [SPS 54901-428 (SPS dwg. PMA-PWA-54901, rev. 0 dated 6/16/03)](https://drs.faa.gov/browse/excelExternalWindow/70C54C4571D96AD78525704C00570A0C.0001): Self-Locking Hex Nut. SPS Technologies Inc · Replaces P&W 386105 · Jul 6, 2003
- [NS203283-6-3](https://drs.faa.gov/browse/excelExternalWindow/4F8A872564A5C2FA8525704C00515F45.0001): NUT, S-L CLIP. SPS Technologies Inc · Replaces 641231 (5/26/95 Rev E) · Oct 7, 2002
- [B00106-4](https://drs.faa.gov/browse/excelExternalWindow/8775D9F85AB87ABA8525703E006B94FF.0001): Nut, Self locking, Dbl. Hex .250-28x.235. Bristol Industries · Replaces ST1178-10 · May 31, 2001
- [AK534561](https://drs.faa.gov/browse/excelExternalWindow/FED7DA7067BC7FA1862577CE006B91C4.0001): Shroud. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 534561 · Apr 29, 2001
- [AK534563](https://drs.faa.gov/browse/excelExternalWindow/ED6B5C86E8699F11862577CE006B93ED.0001): Shroud. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 534563 · Apr 29, 2001
- [AK534564](https://drs.faa.gov/browse/excelExternalWindow/E0BFC8081B8C3577862577CE006B94BD.0001): Shroud. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 534564 · Apr 29, 2001
- [AK534464](https://drs.faa.gov/browse/excelExternalWindow/D5DBFB701BC6C22C862577CE006B94F1.0001): Vane. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 534464 · Apr 29, 2001
- [AK364858](https://drs.faa.gov/browse/excelExternalWindow/C3385B8B3E2CDD69862577CE006B9445.0001): Ring. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 364858 · Apr 29, 2001
- [AK759581](https://drs.faa.gov/browse/excelExternalWindow/B3FB359E374DECB1862577CE006B9152.0001): Stator Assy 11th Stage. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 759581 · Apr 29, 2001
- [AK765573](https://drs.faa.gov/browse/excelExternalWindow/AF4DDAADE67C123D862577CE006B93A2.0001): Stator Assy 13th Stage. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 765573 · Apr 29, 2001
- [AK703164](https://drs.faa.gov/browse/excelExternalWindow/AACE6E5D136B38C9862577CE006B9491.0001): Shroud. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 703164 · Apr 29, 2001
- [AK534461](https://drs.faa.gov/browse/excelExternalWindow/A7989248819EC4CA862577CE006B91F9.0001): Vane. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 534461 · Apr 29, 2001
- [AK534463](https://drs.faa.gov/browse/excelExternalWindow/A641A9F8C7592C2B862577CE006B9419.0001): Vane. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 534463 · Apr 29, 2001
- [AK364863](https://drs.faa.gov/browse/excelExternalWindow/9AD067EAF529D234862577CE006B93CC.0001): Shroud. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 364863 · Apr 29, 2001
- [AK364856](https://drs.faa.gov/browse/excelExternalWindow/92BCD1A5064EC652862577CE006B922B.0001): Ring. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 364856 · Apr 29, 2001
- [AK364859](https://drs.faa.gov/browse/excelExternalWindow/6AC7652F8AE8DAC4862577CE006B9520.0001): Ring. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 364859 · Apr 29, 2001
- [AK495024](https://drs.faa.gov/browse/excelExternalWindow/60E3F2F5FAA53AA8862577CE006B9259.0001): Pin. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 495024 · Apr 29, 2001
- [AK765574](https://drs.faa.gov/browse/excelExternalWindow/4D763B38954CC658862577CE006B9466.0001): Stator Assy 14th Stage. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 765574 · Apr 29, 2001
- [AK364861](https://drs.faa.gov/browse/excelExternalWindow/1081703C431A77F3862577CE006B9191.0001): Shroud. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 364861 · Apr 29, 2001
- [KT218406](https://drs.faa.gov/browse/excelExternalWindow/ED4578BE9B6168518525704D0051E27D.0001): Seal. Turbine Kinetics Inc, Subsidiary of HEICO Corp · Replaces 218406 · Feb 19, 2001
- [KT218406](https://drs.faa.gov/browse/excelExternalWindow/E4E5230266A6CF3E862575010058A1E7.0001): Seal. Turbine Kinetics Inc, Subsidiary of HEICO Corp · PMA PQ0816NE · Replaces 218406 · Feb 19, 2001
- [CD534464](https://drs.faa.gov/browse/excelExternalWindow/F15DE600385569E28525703E006CB879.0001): Stage 14 Vane. Chromalloy Gas Turbine Corp - Dallas · Replaces Pratt & Whitney 534464 · Oct 22, 2000
- [CD534461](https://drs.faa.gov/browse/excelExternalWindow/D64084A2E89EA0BD8525703E006CB876.0001): Stage 11 Vane. Chromalloy Gas Turbine Corp - Dallas · Replaces Pratt & Whitney 534461 · Oct 22, 2000
- [CD534465](https://drs.faa.gov/browse/excelExternalWindow/C51BFCE692D884298525703E006CB87A.0001): Stage 15 Vane. Chromalloy Gas Turbine Corp - Dallas · Replaces Pratt & Whitney 534465 · Oct 22, 2000
- [CD534463](https://drs.faa.gov/browse/excelExternalWindow/A850C1CCBD9310FB8525703E006CB878.0001): Stage 13 Vane. Chromalloy Gas Turbine Corp - Dallas · Replaces Pratt & Whitney 534463 · Oct 22, 2000
- [CD534460](https://drs.faa.gov/browse/excelExternalWindow/6233A58860E2BEF78525703E006CB875.0001): Stage 10 Vane. Chromalloy Gas Turbine Corp - Dallas · Replaces Pratt & Whitney 534460 · Oct 22, 2000
- [CD534462](https://drs.faa.gov/browse/excelExternalWindow/1EB4FE450881FEC18525703E006CB877.0001): Stage 12 Vane. Chromalloy Gas Turbine Corp - Dallas · Replaces Pratt & Whitney 534462 · Oct 22, 2000
- [GRF387316](https://drs.faa.gov/browse/excelExternalWindow/70B2B6665E2D2549852570420058F44B.0001): Rivet. Genie Fastener Mfg Co · Replaces PWA387316 · May 14, 2000
- [GRF468991](https://drs.faa.gov/browse/excelExternalWindow/75038B3F96B49D8B852570420058F006.0001): Rivet. Genie Fastener Mfg Co · Replaces PWA468991 · Nov 18, 1999
- [GRF468990](https://drs.faa.gov/browse/excelExternalWindow/45F28D555E9A0CC4852570420058F005.0001): Rivet. Genie Fastener Mfg Co · Replaces PWA468990 · Nov 18, 1999
- [DEC01-039-501](https://drs.faa.gov/browse/excelExternalWindow/8769592E5A8F8E4B8525703E006FB41F.0001): Lever - Pressure Ratio Bleed Control. DEC Technologies Inc · Replaces Pratt & Whitney 393909 · May 3, 1999
- [DEC01-047-501](https://drs.faa.gov/browse/excelExternalWindow/2F7809F5ACCC8A0A8525703E006FB421.0001): Valve - Pressure Ratio Bleed Control. DEC Technologies Inc · Replaces Pratt & Whitney 407272 · May 3, 1999

All of them: https://openairdocs.org/engine/pratt-whitney-jt3d-7a/pma.md

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