# Pratt & Whitney JT3D-7 - Type: Engine model (FAA registry) - Registry code: 51688 - Manufacturer (registry): P & W - Model: JT3D-7 - 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-7 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 89-22-07](https://openairdocs.org/ad/89-22-07): Overhaul · Pratt & Whitney Division JT3D-3B and JT3D-7. Effective Oct 31, 1989 - [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 75-04-07](https://openairdocs.org/ad/75-04-07): Tenth Stage Compressor Disk · Pratt & Whitney Division JT3D-3, JT3D-3B and JT3D-7. Effective Feb 19, 1975 - [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 69-01-04](https://openairdocs.org/ad/69-01-04): Pratt & Whitney Division JT3D-1, JT3D-1-MC6, JT3D-1-MC7 and 3 more - [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 (265, newest 50) As reported by operators and repair stations, by the model named in the report. - [SDR IXXA20120922027O](https://openairdocs.org/sdr/IXXA20120922027O), Sep 22, 2012: CONTROL VALVE. LEAKING. DURING FLIGHT, HYDRAULIC QUANTITY LEVEL STARTED SLOWLY DECREASING. ACFT RETURNED TO ORIGINATING STATION. FOUND SLOT CONTROL VALVE LEAKING. R & R PACKING AND O-R - [SDR IXXA20120228005O](https://openairdocs.org/sdr/IXXA20120228005O), Feb 28, 2012: SWITCH. LEAKING. NR 3 ENGINE STARTED SLOWLY LEAKING OIL. AT 1418Z WITH NR 3 OIL QUANTITY INDICATION OF 1 GALLON AND NR 3 OIL TEMP SLOWLY STARTING TO INCREASE, NR 3 ENGINE WAS SH - [SDR IXXA110013O](https://openairdocs.org/sdr/IXXA110013O), Feb 6, 2011: PRESSURE SWITCH. CRACKED. DURING CRUISE, THE CREW SHUTDOWN NR 1 ENGINE DUE TO LOSS OF OIL QTY. THEY LANDED WITHOUT FURTHER INCIDENT. MX INPECTED NR 1 ENGINE AND FOUND OIL DIFFERENTIAL PR - [SDR IXXA100033O](https://openairdocs.org/sdr/IXXA100033O), May 19, 2010: FUEL FILTER. CLOGGED. AFTER LEVEL OFF, WITH ANTI-ICE OFF NR 3 ENG N1 ROLLED BACK TO 80 PERCENT, N2 89 PERCENT, OIL PRESSURE 50PSI, FUEL FLOW FLUCTATING 2000-2800 AND PPH EPR 1.4-1.6. - [SDR IXXA100019O](https://openairdocs.org/sdr/IXXA100019O), Mar 3, 2010: STRIKER. OUT OF ADJUST. DURING CLIMBOUT, AFTER GEAR RETRACTION THE DOOR NOT LATCH LIGHT REMAINED ON. THE CREW CYCLED THE GEAR AND LIGHT REMAINED ON. THEY LANDED WITHOUT FURTHER INCIDEN - [SDR IXXA100018O](https://openairdocs.org/sdr/IXXA100018O), Feb 28, 2010: ANTI-ICE VALVE. DEFECTIVE. DURING CLIMB OUT WITH ANTI-ICE ON NR 4 ENG COMPRESSOR STALLED. THE CREW RETURNED TO DEPARTURE WITHOUT FURTHER INCIDENT. MX REPLACED NR 4 INBD ANTI-ICE CONTROL V - [SDR IXXA100017O](https://openairdocs.org/sdr/IXXA100017O), Feb 19, 2010: STRIKER. OUT OF ADJUST. DURING CLIMBOUT, THE DOOR NOT LATCH LIGHT REMAINED ON AFTER GEAR RETRACTION, CREW CYCLED THE GEAR AND LIGHT REMAINED ON. THEY LANDED WITHOUT FURTHER INCIDENT. M - [SDR IXXA100012O](https://openairdocs.org/sdr/IXXA100012O), Jan 31, 2010: OIL SYSTEM. LOW PRESSURE. DURING CRUISE FROM NR 2 ENGINE LOW OIL PRESSURE LIGHT CAME ON. THE CREW SHUTDOWN NR 2 ENG AND LANDED WITHOUT FURTHER INCIDENT. MX REPLACED MAIN OIL FILTER, LOW - [SDR IXXA100011O](https://openairdocs.org/sdr/IXXA100011O), Jan 30, 2010: PRESSURE SWITCH. MALFUNCTIONED. DURING CRUISE, NR 2 ENG LOW PRESSURE LIGHT CAME ON. THE CREW SHUTDOWN NR 2 ENG AND LANDED WITHOUT FURTHER INCIDENT. MX REPLACED LOW OIL PRESSURE SWITCH AND OIL - [SDR IXXA090058O](https://openairdocs.org/sdr/IXXA090058O), Oct 18, 2009: CLAMP. LOOSE. DURING APPROACH INTO KBWI NUMBER FOUR ENGINE FIRE WARNING CAME ON INTERMITTENTLY. THE CREW SHUTDOWN NUMBER FOUR ENGINE AS A PRECAUTION, THEY LANDED WITHOUT FURT - [SDR IXXA090030O](https://openairdocs.org/sdr/IXXA090030O), May 15, 2009: ENGINE. POWER LOSS. DURING CRUISE FROM BGTL NR 2 ENGINE LOST POWER, THE ENGINE DID NOT RESPOND TO THROTTLE MOVEMENT AND THERE WAS AN AUDIBLE ENGINE STALL. THE GENERATOR DID NOT GO - [SDR 22AA20081203](https://openairdocs.org/sdr/22AA20081203), Dec 31, 2008: BLEED VALVE. STUCK. LOG PAGE NR 128276. NR 1 ENGINE WOULD NOT ACCELERATE TO TAKE-OFF POWER; REJECTED TAKE OFF AT 80 KTS. - RETURNED TO GATE. FOUND NR 1 COMPRESSOR BLEED VALVE STUCK - [SDR IXXA080032O](https://openairdocs.org/sdr/IXXA080032O), Nov 5, 2008: OIL SYSTEM. LEAKING. DURING CRUISE, NR 4 ENGINE OIL PRESSURE WAS FLUCTUATING & OIL PRESSURE LIGHT FLICKERING, OIL QUANTITY READ 0. CREW RAN ABNORMAL OIL PRESSURE CHECKLIST FOLLOWED - [SDR ARWA20080707](https://openairdocs.org/sdr/ARWA20080707), Jul 31, 2008: FUEL CONTROL. MALFUNCTIONED. ENG NR 1 FAILED TO ACCELERATE BEYOND GROUND IDLE. REMOVED AND REPLACED FUEL CONTROL UNIT AT NR 1 ENG IAW DC8 MM 73-20-1. PERFORMED ENG RUN UP IAW DC8 MM 77-00. - [SDR IXX2008F00007](https://openairdocs.org/sdr/IXX2008F00007), Jul 6, 2008: ENGINE. OIL CONSUMPTION. DURING CRUISE, THE CREW SHUTDOWN NR 3 ENGINE DUE TO OIL QUANTITY DROPPING TO LESS THAN ONE GALLON, OIL PRESSURE GAUGE FLUCTUATING, OIL TEMP WAS ABOVE 115C, OIL - [SDR IXXA080017O](https://openairdocs.org/sdr/IXXA080017O), May 1, 2008: PRESSURE SWITCH. LEAKING. DURING CRUISE FROM HIK, THE CREW SHUTDOWN NR 1 ENGINE AT 2102Z DUE TO FLUCTUATING OIL PRESSURE AND FLICKERING OIL PRESSURE LIGHT. WIND MILLING OIL PRESSURE FLUC - [SDR 865FLP2936](https://openairdocs.org/sdr/865FLP2936), Mar 28, 2008: COMPRESSOR. STALLED. NR 1 ENGINE COMPRESSOR STALLED AT 1000 FT AND WAS SECURED. ENGINE WAS RELIT PRIOR TO LANDING. ENGINE POWER ASSURANCE RUN ON GROUND DETECTED NO DISCREPANCIES. - [SDR IXXA070043O](https://openairdocs.org/sdr/IXXA070043O), Aug 23, 2007: B-NUT. LOOSE. DURING CRUISE FROM KBWI NUMBER THREE ENGINE OIL QUANITY SLOWLY DECREASED UNTIL INDICATING ZERO. PRESSURE AND TEMPERATURE REMAINED NORMAL UNTIL THE OIL PRESSURE - [SDR ARWA20070802](https://openairdocs.org/sdr/ARWA20070802), Aug 18, 2007: INDICATOR. MALFUNCTIONED. POWER REDUCTION REQUIRED ON NR 2 ENGINE AFTER TAKEOFF IN ORDER TO MAINTAIN EGT LIMIT. 09-04-07 REMOVED AND REPLACED NR 2 EGT INDICATOR IN ACCORDANCE WITH MM 77- - [SDR IXXA070036O](https://openairdocs.org/sdr/IXXA070036O), Aug 1, 2007: FUEL CONTROL. MALFUNCTIONED. DURING CRUISE FROM WSAP TO RJTY NR 1 ENGINE LOST POWER EPR REDUCED 1.2 AND FUEL FLOW DECREASED 1000 POUNDS PER HOUR. THE CREW PERFORMED THE ENGINE SHUTDOWN CHEC - [SDR ARWA20070703](https://openairdocs.org/sdr/ARWA20070703), Jul 10, 2007: BLEED VALVE. MALFUNCTIONED. ABORTED TAKE-OFF AT 118 KTS, UNABLE TO MAINTAIN TAKEOFF POWER WITHOUT EXCEEDING NR 3 ENGINE EGT LIMIT. REMOVED NR 3 ENGINE SURGE VALVE IN ACCORDANCE WITH M/M 75 - [SDR ABXA070107](https://openairdocs.org/sdr/ABXA070107), Apr 17, 2007: TRANSMITTER. DEFECTIVE. AT TOP OF CLIMB, NR 1 ENGINE OIL PRESSURE STARTED DROPPING OFF INTO CAUTIONARY RANGE. RAN ABNORMAL CHECK LIST, REDUCED POWER TO IDLE. OIL PRESSURE DROPPED BELOW - [SDR ABXA060311](https://openairdocs.org/sdr/ABXA060311), Dec 4, 2006: ENGINE. LEAKING. NR 3 ENGINE SHUT DOWN IN FLIGHT (STA SDF) DUE TO LOSS OF OIL. FERRIED AIRCRAFT BACK TO ILN. REMOVED AND REPLACED NR 3 ENGINE PER JOB CARD 8090507 IN WORK PACK 6 - [SDR IXXA060450O](https://openairdocs.org/sdr/IXXA060450O), Jun 19, 2006: PRBC. STICKING. DURING TAKE-OFF FROM KWRI NUMBER 3 ENGINE FAILED TO ACHIEVE TAKE-OFF POWER. THE FLIGHT CREW REJECTED THE TAKE-OFF AND RETURNED TO PARKING. MAINTENANCE TROUBLESH - [SDR ARWA20060304](https://openairdocs.org/sdr/ARWA20060304), Mar 29, 2006: ENGINE. LEAKING. DURING CRUISE, NR 2 ENGINE LOSS OF ALL OIL QUANTITY AND PRESSURE; PRECAUTIONARY ENGINE SHUTDOWN AS PER CHECKLIST (TIME 0655). REMOVED AND REPLACED NR 2 ENGINE I - [SDR ABXA060081](https://openairdocs.org/sdr/ABXA060081), Feb 14, 2006: FUEL CONTROL. DEFECTIVE. NR 3 ENGINE FAILED TO ACCELERATE IN-FLIGHT. EET 20 DEGREES N2 48%, FF AT 1000 LBS. ATTEMPTED RE-LIGHT TO NO AVAIL. SHUT DOWN NR 3 ENGINE AT 0518Z, 4 PSI INDICAT - [SDR ARWA20060202](https://openairdocs.org/sdr/ARWA20060202), Feb 8, 2006: ENGINE. VIBRATION. SHUT-DOWN NR 3 ENGINE IN FLIGHT DUE TO VIBRATION. COMPLIED WITH ALL CHECKLIST. C/W RED BORDER NR 019421 NR 3 ENGINE P-679000 REPLACEMENT. COMPLY WITH RED BORDER - [SDR ABXA060059](https://openairdocs.org/sdr/ABXA060059), Jan 20, 2006: SKIN. CORRODED. FUSELAGE SKIN LOWER SIDE OF NR 3 CARGO DOOR HAD A SPOT OF CORROSION. REPAIRED NR3 CARGO DOOR JAMB SKIN IAW SRM 53-2-1, FIG. 9. PARTIAL WORK NR1-102 FOR WORK ACC - [SDR IXXA0600087O](https://openairdocs.org/sdr/IXXA0600087O), Jan 18, 2006: RELIEF VALVE. MISINSTALLED. AT LEVEL OFF, THROTTLES REDUCED TO CRUISE PWR NR 1 ENG OIL PRESS LIGHT CAME ON. OIL PRESS IND 10 PSI. CREW SHUTDOWN ENG. LANDED W/O INCIDENT. MX VERIFIED NO SIG - [SDR ABXA050379](https://openairdocs.org/sdr/ABXA050379), Dec 21, 2005: TRANSMITTER. DEFECTIVE. NR 3 ENGINE OIL PRESSURE WAS 37 TO 39 PSI IN CRUISE. RETARDED THROTTLE TO IDLE TO COMPLY WITH ABNORMAL PROCEDURES, OIL PRESSURE WAS 35 PSI. OIL PRESSURE DROPPED - [SDR ARWA20051202](https://openairdocs.org/sdr/ARWA20051202), Dec 20, 2005: ACTUATOR. LEAKING. LOG PAGE NR 116558. ON POST FLIGHT FOUND LEAKING BY EMPANAGE LOWER SIDE REAR STRIKE PAD REAR ACCESS PANEL. REMOVED AND REPLACED RUDDER PACK ACTUATOR IAW MM 27-2 - [SDR ABXA060021](https://openairdocs.org/sdr/ABXA060021), Dec 2, 2005: FRAME. CORRODED. STA. 1100, LONGERON 18 RT, FRAME CORRODED. REPAIRED FRAME AT STA. 1100, LONGERON 18 RT IAW SRM 53-2-0, FIGURE 2. - [SDR ARWA20051102](https://openairdocs.org/sdr/ARWA20051102), Nov 17, 2005: BLADES. DAMAGED. UPON ENGINE SPOOL UP FOR TAKEOFF, NR 4 ENGINE COMPRESSOR STALLED. PERFORMED BOROSCOPE TO NR 4 ENGINE; FOUND BLADES DAMAGED, SECURED NR 4 ENGINE FOR FERRY FLIGHT - [SDR ABXA050308](https://openairdocs.org/sdr/ABXA050308), Nov 11, 2005: FLOORBEAM. CORRODED. MAIN CABIN, STA 798, BUTT LINE 0 - RT BUTT LINE 48, FLOORBEAM CORRODED. REMOVED NUT PLATES, CLEANED CORROSION ON FLOORBEAM AT STA 798, BUTT LINE 0 - RT BUTT LIN - [SDR ABXA050309](https://openairdocs.org/sdr/ABXA050309), Nov 8, 2005: TRIPLER. CORRODED. EXISTING TRIPLER CORRODED AT STA 857, RT BUTT LINE 50. FABRICATED TRIPLER AT STA 857, RT BUTT LINE 50 IAW REA D853-52539. MATERIAL USED .190 7075-T6, P/O NR 107 - [SDR ABXA050306](https://openairdocs.org/sdr/ABXA050306), Nov 7, 2005: ANGLE. CORRODED. LOWER CHORD AT STA 857, RT BUTT LINE 23 CORRODED. FABRICATED CHORD AT STA 857, RT BUTT LINE 23 IAW REA D853-52537. MATERIAL USED P/N: AND-10134-1407, P/O NR1122 - [SDR ABXA060019](https://openairdocs.org/sdr/ABXA060019), Nov 1, 2005: FLOORBEAM. CORRODED. MAIN CARGO, STA. 55, LBL 20, CORROSION ON UNDERSIDE OF FLOORBEAM CORNER. REMOVED A 3.5 INCH X .7500 INCH SECTION OF UPPER FLANGE FLOORBEAM AT STA. 55, LBL 20 IA - [SDR ABXA050310](https://openairdocs.org/sdr/ABXA050310), Oct 26, 2005: LONGERON. CORRODED. CORROSION FOUND ON STR 31 L (LONGERON) FROM STA. 610 - 730 IN MID ACCESSORY COMPARTMENT. REMOVED AND REPLACED LONGERON 31 LT FROM STA. 610-730 REF SRM 51-1-20 A - [SDR ABXA060020](https://openairdocs.org/sdr/ABXA060020), Oct 26, 2005: FLOORBEAM. CORRODED. MAIN CABIN, STA. 857, LBL 12, FLOORBEAM UPPER CAP CORRODED. REMOVED CORROSION ON FLOORBEAM STA. 857, LBL 12. MATERIAL LOSS OUT OF LIMITS. FABRICATED AND INSTALL - [SDR ARWA20051004](https://openairdocs.org/sdr/ARWA20051004), Oct 22, 2005: COMPRESSOR. STALLED. LOG PAGE NR 117333, DURING TAKEOFF, NR 2 ENGINE COMPRESSOR STALLED. PERFORM NR 2 ENGINE INLET AND EXHAUST SECTION INSPECTION FOR DAMAGE IAW M/M 71-00 AND PERFOR - [SDR ABXA050338](https://openairdocs.org/sdr/ABXA050338), Oct 19, 2005: AIR DUCT. DENTED. NR 4 ENGINE L/S TRANSITION AIR DUCT HAD SEVERAL DENTS. 2 DENTS AT 9 AND 11 O'CLOCK POSITIONS OUT OF LIMITS IAW DC8 SRM 51-1-9A. CLEANED UP AREA OF DENTS AT 9 AN - [SDR ABXA050337](https://openairdocs.org/sdr/ABXA050337), Oct 17, 2005: CASE. WORN. NR 2 ENGINE EXHAUST NOZZLE 6 O'CLOCK POSITION, CASE WORN. REMOVED DAMAGED EXISTING DOUBLERS IAW DC8 SRM 51-1-21. FABRICATED NEW DOUBLERS IAW SSRM DWG NR 78-841 - [SDR ABXA060018](https://openairdocs.org/sdr/ABXA060018), Oct 14, 2005: FITTING. CRACKED. AFT CARGO, RT SIDE, STA. 1580 HAD CRACKED FITTING, RBL 58, LONGERON 21 RT. REMOVED AND REPLACED CRACKED FITTING AT STA. 1580, RBL 58 IAW SRM 51-1-21 AND 51-3-1. - [SDR ABXA060017](https://openairdocs.org/sdr/ABXA060017), Oct 12, 2005: ANGLE. CORRODED. CORROSION LOWER ANGLE ON PRESSURE WEB ON FWD BULKHEAD STA. 857, FORWARD OF RT. WHEEL WELL, APPROXIMATELY LONGERON 24. WING TO BODY ANGLE AT STA. 857 CORRODED BE - [SDR ABXA060016](https://openairdocs.org/sdr/ABXA060016), Oct 11, 2005: FLOORBEAM. CORRODED. CORROSION RUNNING THE ENTIRE FLOORBEAM, FORMER AND FASTENERS AT STA. 1640, LONGERON 22 RT, UNDERSIDE AFT. CORRODED BEYOND LIMITS AT RBL 53-60. REMOVED END CAP A - [SDR ABXA060015](https://openairdocs.org/sdr/ABXA060015), Oct 11, 2005: CUSP WEB. CORRODED. CORROSION ON CUSP LINE EXTRUSION, STA. 1020 TO STA. 114O, LONGERON 21 RT. CORRODED BEYOND LIMITS. REMOVED AND REPLACED CUSP EXTRUSION IAW SRM 53-2-5, FIG. 15 AN - [SDR ARWA20050909](https://openairdocs.org/sdr/ARWA20050909), Sep 10, 2005: BLEED VALVE. FAILED. DURING TAKEOFF AT MAX POWER 1.87 GPR BETWEEN 60 AND 80 KNOTS, HAD A LOUD BANG ON NR 2 ENGINE COMPRESSOR N2 INDICATOR SWUNG VIOLENTLY. ABORTED TAKEOFF AND SECURE - [SDR ARWA20050901](https://openairdocs.org/sdr/ARWA20050901), Sep 7, 2005: BLEED VALVE. FAILED. ABORTED TAKEOFF AT 60 KNOTS UPON HEARING A LOUD BANG; NR 1 ENGINE COMPRESSOR STALLED. REMOVED AND REPLACED BLEED VALVE AND CONTROL COMPRESSOR IN ACCORDANCE WITH - [SDR ARWA20050804](https://openairdocs.org/sdr/ARWA20050804), Aug 18, 2005: CRANK ASSY. BROKEN. WHEN POWER SET FOR TAKEOFF, TAKEOFF WARNING HORN SOUNDED AND SPOILER EXTENDED LIGHT ILLUMINATED. REMOVED AND REPLACED BROKEN GROUND SPOILER ACTUATION CRANKS IAW - [SDR ARWA20050702](https://openairdocs.org/sdr/ARWA20050702), Jul 22, 2005: ANTI-ICE VALVE. MALFUNCTIONED. DURING TAXI OUT, NR 1 ENGINE ANTI-ICE VALVE LIGHT ILLUMINATED; FOLLOWED ABNORMAL PROCEDURE; RETURN TO RAMP. REMOVED AND REPLACED NR 1 ENGINE RT ANTI-ICE VALVE I All 265: https://openairdocs.org/engine/pratt-whitney-jt3d-7/reports.md ## STCs that may be installed (OpenAirDocs) (4) 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 SE1617GL](https://openairdocs.org/stc/SE1617GL): Installation of Ametek 8TJ124GGR1 digital mass fuel flow transmitter. ABX Air Incorporated - [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 SE87WE](https://openairdocs.org/stc/SE87WE): Replace the airfoils on P&WA P/Ns 505351, 536751, 665951, 665851 first stage turbine nozzle guid vanes on P&WA engine models listed. Chromizing Company - [STC SE1WE](https://openairdocs.org/stc/SE1WE): Valve assembly 126495. Limited to those engines having serial number suffix 'B'. Telecomputing Corp. Lists JT3D Series --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.