# N709CK: 1993 Boeing 747-4B5

- Status: Valid registration
- Airframe: [Boeing 747-4B5](https://openairdocs.org/model/boeing-747-4b5) (registry code 13848BQ, 495 seats)
- Engine: [Pratt & Whitney PW4056](https://openairdocs.org/engine/pratt-whitney-pw4056) (registry code 51665)
- Data sheets: [TCDS E24NE](https://openairdocs.org/tcds/E24NE) (Pratt & Whitney Division) (OpenAirDocs)
- Serial number: 26396
- Year built: 1993
- Type: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: February 28, 2017
- Certificate issued: April 24, 2019
- Expires: April 30, 2029
- Mode S code: A97639
- Registered owner: [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC)
- Location: [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti)
- Owner type: LLC
- Owner's area on the map: 42.2751° N, 83.5863° W: Placed by OpenAirDocs at the center of ZIP code 48198, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=709CK
- Page: https://openairdocs.org/aircraft/N709CK

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 25 in force

### Matched by airframe (Boeing 747-4B5)

None in force.

### Matched by engine (Pratt & Whitney PW4056)

- [AD 2026-21-06](https://openairdocs.org/ad/2026-21-06): Engine Fuel and Control · Pratt & Whitney Division PW4052, PW4056, PW4060 and 10 more. Effective Nov 23, 2026
- [AD 2018-13-02](https://openairdocs.org/ad/2018-13-02): Turbine Engine Combustion Section · Pratt & Whitney Division PW4052, PW4056, PW4060 and 7 more. Effective Jul 20, 2018
- [AD 2016-08-09](https://openairdocs.org/ad/2016-08-09): HPC 10th stage disk · Pratt & Whitney Division PW4050, PW4052, PW4056 and 24 more. Effective Jun 1, 2016
- [AD 2015-22-03](https://openairdocs.org/ad/2015-22-03): LPT 4th stage IAS · Pratt & Whitney Division PW4050, PW4052, PW4056 and 24 more. Effective Dec 1, 2015
- [AD 2012-22-16](https://openairdocs.org/ad/2012-22-16): 3rd stage LPT duct segments · Pratt & Whitney Division PW4050, PW4052, PW4056 and 13 more. Effective Dec 19, 2012
- [AD 2012-14-09](https://openairdocs.org/ad/2012-14-09): 3rd and 4th stage vane fractures · Pratt & Whitney Division PW4050, PW4052, PW4056 and 24 more. Effective Nov 7, 2012
- [AD 2012-18-17](https://openairdocs.org/ad/2012-18-17): HPC drum rotor disk assembly · Pratt & Whitney Division PW4052, PW4056, PW4060 and 16 more. Effective Oct 22, 2012
- [AD 2012-18-03](https://openairdocs.org/ad/2012-18-03): 1st stage HPT air seal rings · Pratt & Whitney Division PW4050, PW4052, PW4056 and 18 more. Effective Oct 11, 2012
- [AD 2012-16-01](https://openairdocs.org/ad/2012-16-01): High-pressure turbine (HPT) stage 1 front hubs · Pratt & Whitney Division PW4052, PW4056, PW4060 and 14 more. Effective Sep 28, 2012
- [AD 2012-06-18](https://openairdocs.org/ad/2012-06-18): Engine · Pratt & Whitney Division PW4050, PW4052, PW4056 and 13 more. Effective Apr 27, 2012
- [AD 2012-04-04](https://openairdocs.org/ad/2012-04-04): fuel metering units (FMUs) · Pratt & Whitney Division PW4050, PW4052, PW4056 and 13 more. Effective Apr 5, 2012
- [AD 2011-25-09](https://openairdocs.org/ad/2011-25-09): PW4000 turbofan engines · Pratt & Whitney Division PW4050, PW4052, PW4056 and 18 more. Effective Jan 10, 2012
- [AD 2010-24-14](https://openairdocs.org/ad/2010-24-14): HPC 10th stage disk · Pratt & Whitney Division PW4050, PW4052, PW4056 and 17 more. Effective Jan 21, 2011
- [AD 2010-24-09](https://openairdocs.org/ad/2010-24-09): No. 3 bearing oil pressure tubes · Pratt & Whitney Division PW4050, PW4052, PW4056 and 34 more. Effective Dec 28, 2010
- [AD 2008-24-13](https://openairdocs.org/ad/2008-24-13): Electronic engine controls (EECs) · Pratt & Whitney Division PW4052, PW4056, PW4060 and 6 more. Effective Jan 8, 2009
- [AD 2005-25-09](https://openairdocs.org/ad/2005-25-09): Engine manufacturer's time limits section (TLS) · Pratt & Whitney Division PW4050, PW4052, PW4056 and 26 more. Effective Jun 12, 2006
- [AD 2003-19-15](https://openairdocs.org/ad/2003-19-15): High-Pressure-Compressor (HPC) Surges · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more. Effective Oct 30, 2003
- [AD 2002-12-15](https://openairdocs.org/ad/2002-12-15): Front Drum Rotors · Pratt & Whitney Division PW4052, PW4056, PW4060 and 6 more. Effective Jul 31, 2002
- [AD 2001-05-07](https://openairdocs.org/ad/2001-05-07): Low Pressure Turbine (LPT) 4th Stage Air Seal · Pratt & Whitney Division PW4052, PW4056, PW4060 and 11 more. Effective Mar 30, 2001
- [AD 99-15-01](https://openairdocs.org/ad/99-15-01): Low Pressure Turbine Disks · Pratt & Whitney Division PW4056, PW4152, PW4156A and 3 more. Effective Sep 14, 1999
- [AD 98-23-08](https://openairdocs.org/ad/98-23-08): High Pressure Compressor  Blade Tips · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more. Effective Jan 12, 1999
- [AD 98-19-03](https://openairdocs.org/ad/98-19-03): High Pressure Turbine Rotating Airseals · Pratt & Whitney Division PW4052, PW4056, PW4060 and 9 more. Effective Nov 9, 1998
- [AD 96-13-08](https://openairdocs.org/ad/96-13-08): AFT Cascade Support Frame Assembly · Pratt & Whitney assembly Part Number 221D5015, Revision A (STC SE744NE). Effective Aug 1, 1996
- [AD 93-08-16](https://openairdocs.org/ad/93-08-16): Fuel Pump · Pratt & Whitney Division PW4050, PW4052, PW4056 and 2 more. Effective Jul 12, 1993
- [AD 90-22-02](https://openairdocs.org/ad/90-22-02): Low Pressure Turbine Shaft · Pratt & Whitney Division PW4050, PW4052, PW4056 and 6 more. Effective Oct 18, 1990

### Historical (superseded or no longer in force)

- [AD 2010-18-13](https://openairdocs.org/ad/2010-18-13) (historical): Blade · Pratt & Whitney Division PW4052, PW4056, PW4060 and 16 more. Effective Oct 18, 2010
- [AD 2003-11-18](https://openairdocs.org/ad/2003-11-18) (historical): High-Pressure-Compressor (HPC) · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more. Effective Jul 7, 2003
- [AD 2002-21-10](https://openairdocs.org/ad/2002-21-10) (historical): High pressure compressor (HPC) · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more. Effective Nov 12, 2002
- [AD 2002-03-08](https://openairdocs.org/ad/2002-03-08) (historical): Time Limits Section of Engine Manuals (EM's) · Pratt & Whitney Division PW4050, PW4052, PW4056 and 25 more. Effective Apr 16, 2002
- [AD 2001-25-11](https://openairdocs.org/ad/2001-25-11) (historical): Compressor Surges · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more. Effective Jan 17, 2002
- [AD 2001-20-13](https://openairdocs.org/ad/2001-20-13) (historical): High Pressure Compressor Front Drum Rotors · Pratt & Whitney Division PW4052, PW4056, PW4060 and 6 more. Effective Nov 16, 2001
- [AD 2001-15-12](https://openairdocs.org/ad/2001-15-12) (historical): High Pressure Compressors (HPC) · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more. Effective Aug 10, 2001
- [AD 2001-09-07](https://openairdocs.org/ad/2001-09-07) (historical): High Pressure Compressor (HPC) Surge · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more. Effective May 14, 2001
- [AD 2001-08-52](https://openairdocs.org/ad/2001-08-52) (historical): Multiple-engine power loss due to HPC surges · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more
- [AD 2000-25-06](https://openairdocs.org/ad/2000-25-06) (historical): Low Pressure Turbine (LPT) 4th Stage Air Seal · Pratt & Whitney Division PW4052, PW4056, PW4060 and 11 more. Effective Dec 29, 2000
- [AD 2000-22-01](https://openairdocs.org/ad/2000-22-01) (historical): High Pressure Compressor Cutback Stator · Pratt & Whitney Division PW4050, PW4052, PW4056 and 6 more. Effective Nov 9, 2000
- [AD 2000-12-02](https://openairdocs.org/ad/2000-12-02) (historical): Critical Life-Limited Part · Pratt & Whitney Division PW4050, PW4052, PW4056 and 24 more. Effective Sep 13, 2000
- [AD 99-17-16](https://openairdocs.org/ad/99-17-16) (historical): Pratt & Whitney Division PW4050, PW4052, PW4056 and 11 more. Effective Sep 24, 1999
- [AD 99-08-15](https://openairdocs.org/ad/99-08-15) (historical): Pratt & Whitney Division PW4050, PW4052, PW4056 and 20 more. Effective May 13, 1999

## Information bulletins (advisory) (5 in force)

- [SAIB 2025-06](https://openairdocs.org/saib/2025-06): High Pressure Turbines. Issued Jul 22, 2025
- [SAIB NE-19-02](https://openairdocs.org/saib/NE-19-02): Turbine Engine Compressor Section -- Low-pressure turbine uncontainment. Issued Feb 19, 2019
- [SAIB NE-16-01R1](https://openairdocs.org/saib/NE-16-01R1): Turbine Section. Issued Jan 14, 2016
- [SAIB NE-15-19](https://openairdocs.org/saib/NE-15-19): Turbine Section. Issued Jul 14, 2015
- [SAIB NE-13-31](https://openairdocs.org/saib/NE-13-31): Turbine Engine Oil System  Scavenge Oil Tube Coking and Proper Cleaning at Overhaul. Issued May 9, 2013
- [SAIB NE-16-01](https://openairdocs.org/saib/NE-16-01) (historical): Turbine Section. Issued Oct 5, 2015

## NTSB investigations

None matched to N709CK.

## FAA accident and incident reports

None matched to N709CK.

## Service difficulty reports (41)

As reported by operators and repair stations. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR KCSA202604111030](https://openairdocs.org/sdr/KCSA202604111030), Apr 11, 2026: BATTERY. INOPERATIVE. FO'S EMERGENCY FLASHLIGHT INOP
- [SDR KCSA202604111029](https://openairdocs.org/sdr/KCSA202604111029), Apr 11, 2026: BATTERY. INOPERATIVE. CA'S EMERGENCY FLASHLIGHT INOP.
- [SDR KCSA2026033017](https://openairdocs.org/sdr/KCSA2026033017), Mar 30, 2026: LIGHT. INOPERATIVE. MULTIPLE SIDEWALL LIGHTS INOP ON MAIN DECK. REMOVED AND REPLACED MULTIPLE SIDEWALL LIGHTS IAW AMM 33-51-00. ALL CHECKS GOOD. NO DEFECTS NOTED.
- [SDR KCSA202601061000](https://openairdocs.org/sdr/KCSA202601061000), Jan 6, 2026: RESERVOIR. LOW PRESSURE. LEFT FWD FLOOR EVACUATION SLIDE RESERVOIR FOUND TO BE NOT WITHIN PRESSURE LIMITS
- [SDR KCSA202509201168](https://openairdocs.org/sdr/KCSA202509201168), Sep 20, 2025: BULB. INOPERATIVE. LADDER EMERGENCY LIGHT INOP
- [SDR KCSA202507011107](https://openairdocs.org/sdr/KCSA202507011107), Jul 1, 2025: SIGN. INOPERATIVE. SELF ILLUMINATED EXIT SIGNS FAIL OPS CHECK
- [SDR KCSA202507011106](https://openairdocs.org/sdr/KCSA202507011106), Jul 1, 2025: SEAL DEPRESSOR. CRACKED. R/H UPPER DECK CREW DOOR FWD UPPER CORNER SEAL DEPRESSOR CRACKED
- [SDR KCSA202507011105](https://openairdocs.org/sdr/KCSA202507011105), Jul 1, 2025: SEAL DEPRESSOR. CRACKED. L/H UPPER DECK CREW DOOR FWD UPPER CORNER SEAL DEPRESOR CRACKED
- [SDR KCSA202506261104](https://openairdocs.org/sdr/KCSA202506261104), Jun 26, 2025: INTERCOSTAL. CRACKED. LWR FWD CARGO DOOR AT APPROX BS 580 JUST AFT OF THE FWD LIFT ACTUATOR ON THE DOOR STRUCTURE THE INTERCOSTAL WEB IS CRACKED ABOUT 3" LONG
- [SDR KCSA202506261103](https://openairdocs.org/sdr/KCSA202506261103), Jun 26, 2025: ESCAPE REEL. UNWANTED DEPLOY. FLIGHT DECK EMERGENCY DESCENT DEVICE P/N 379103D-21 S/N 11800 EVIDENCE OF DEPLOYMENT
- [SDR KCSA202506261102](https://openairdocs.org/sdr/KCSA202506261102), Jun 26, 2025: BULKHEAD WEB. CRACKED. #1 PYLON STA 298.9 BULKHEAD WEB CRACKED WHERE HYDRAULIC LINE GOES THROUGH
- [SDR KCSA202506251101](https://openairdocs.org/sdr/KCSA202506251101), Jun 25, 2025: TENSION TIE. CRACKED. CRACK FOUND IN TENSION TIE AFT CHANNEL AT STA 1180 AT LH SIDE END FASTENER DURING SURFACE HFEC NDT INSPECTION
- [SDR KCSA202506251100](https://openairdocs.org/sdr/KCSA202506251100), Jun 25, 2025: FRAME. CRACKED. 1 EA. CRACK INDICATION IN FRAME AT L/H SIDE STA 1140 COMMON WITH TENSION TIE
- [SDR KCSA202506251099](https://openairdocs.org/sdr/KCSA202506251099), Jun 25, 2025: PLATE. CRACKED. R1 MAIN ENTRY DOOR HAS CRACKED FRAME STIFFENER ON FWD SIDE APPROX 18 INCHES UP FROM LWR EDGE
- [SDR KCSA202506251098](https://openairdocs.org/sdr/KCSA202506251098), Jun 25, 2025: TENSION TIE. CRACKED. FOUR FASTENER HOLES HAVE CRACK INDICATIONS IN L/H SIDE TENSION TIE FWD CHANNEL AT STA 1180
- [SDR KCSA202506251097](https://openairdocs.org/sdr/KCSA202506251097), Jun 25, 2025: BEAR STRAP. CRACKED. FOUND CRACK INDICATION DURING HFEC OPEN HOLE INSPECTION AT STA 2231 STR 25R LWR FWD HOLE
- [SDR KCSA202502151011](https://openairdocs.org/sdr/KCSA202502151011), Feb 15, 2025: BATTERY PACK. NO TEST. UPPER DECK EMERGENCY DOOR BATTERY WILL NOT TEST.
- [SDR KCSA202407311093](https://openairdocs.org/sdr/KCSA202407311093), Jul 31, 2024: BATTERY PACK. INOPERATIVE. REF DMI 100183442 RH UPPER DECK DOOR EMERGENCY BATTERY PACK INOP( LOG BOOK ENTRY REQUIRED)
- [SDR KCSA2024072621](https://openairdocs.org/sdr/KCSA2024072621), Jul 26, 2024: BATTERY PACK. UNSERVICEABLE. RIGHT HAND UPPER DECK DOOR EMERGENCY BATTERY PACK INOPERATIVE. TRANSFERRED TO DMI 100183442 CATEGORY C DUE 08-04-2024. MAINTENANCE ACTION COMPLIED WITH. PLACARD
- [SDR KCSA202309121103](https://openairdocs.org/sdr/KCSA202309121103), Sep 12, 2023: BATTERY PACK. INOPERATIVE. L/H UPPER DECK EMERGENCY DOOR "BATTERY OK" LIGHT DOES NOT ILLUMINATE.
- [SDR KCSA202307181081](https://openairdocs.org/sdr/KCSA202307181081), Jul 18, 2023: ANGLE. CRACKED. (FAA FINDING) STATION 140 BULKHEAD FWD OUTBOARD UPPER RING ANGLE IS CRACKED (2") @ LBL 6 MARKED FAA-01
- [SDR KCSA202307171080](https://openairdocs.org/sdr/KCSA202307171080), Jul 17, 2023: GATE. CRACKED. (FAA FINDING) L-2 DOOR UPPER GATE IS POSSIBLY CRACKED (2") STATION 830 MARKED FAA-02
- [SDR KCSA202307171079](https://openairdocs.org/sdr/KCSA202307171079), Jul 17, 2023: GATE. CORRODED. CORROSION FOUND ON UPPER GATE OF L3 DOOR.
- [SDR KCSA202307141078](https://openairdocs.org/sdr/KCSA202307141078), Jul 14, 2023: ANGLE. CRACKED. VERTICAL ANGLE CRACKED ON FWD SIDE AT STA 2658 APU FIREWALL LBL 26 WL 260
- [SDR KCSA202307141077](https://openairdocs.org/sdr/KCSA202307141077), Jul 14, 2023: FIREWALL. CRACKED. (FAA FINDING) STATION 2658 APU FIREWALL IS CRACKED IN 2 PLACES LBL28 WL264 AND LBL 26 WL 260 MARKED FAA-03
- [SDR KCSA202307141076](https://openairdocs.org/sdr/KCSA202307141076), Jul 14, 2023: WEB. CORRODED. EVIDENCE OF CORROSION ON WEB @ STA 1840 RBL 51
- [SDR KCSA2022052309](https://openairdocs.org/sdr/KCSA2022052309), May 23, 2022: GEAR. HUNG UP. GEAR DOOR EICAS RAN QUICK REFERENCE HANDBOOK RETURN TO KCVG- ATC DELCARED EMERGENCY. PERFORMED FIM 32-61 TASK 888, NO DEFECTS NOTED, GENERAL VISUAL INSPECTION O
- [SDR KCSA202109061092](https://openairdocs.org/sdr/KCSA202109061092), Sep 6, 2021: LAMP. INOPERATIVE. EMERGENCY AREA LIGHT IN FLIGHTDECK (REARFACING) INOP. RELAMPED WITH NO HELP.
- [SDR KCSA202106091074](https://openairdocs.org/sdr/KCSA202106091074), Jun 9, 2021: BATTERY PACK. INOPERATIVE. L/H UPPER DECK EMERGENCY DOOR "BATTERY OK" LIGHT DOES NOT ILLUMINATE
- [SDR KCSA202106031073](https://openairdocs.org/sdr/KCSA202106031073), Jun 3, 2021: STRINGER. CRACKED. STA 2231 L/H SIDE STR 16 L FWD TWO LOWER HOLES HAVE CRACK INDICATIONS
- [SDR KCSA202105201067](https://openairdocs.org/sdr/KCSA202105201067), May 20, 2021: STRUCTURE. CRACKED. STA 2231 STR 25 FWD LOWER FASTENER HOLE HAS CRACK INDICATION IN CORD
- [SDR KCSA202105201066](https://openairdocs.org/sdr/KCSA202105201066), May 20, 2021: WEB. CRACKED. STA 2231 L/H SIDE CRACK FOUND IN WEB BETWEEN STR 21L AND 22L
- [SDR KCSA202105191060](https://openairdocs.org/sdr/KCSA202105191060), May 19, 2021: STIFFENER. CRACKED. NOSE WHEEL WELL TOP PANEL STIFFENER CRACKED BETWEEN STA 280 AND 300 RBL 10
- [SDR KCSA202105191059](https://openairdocs.org/sdr/KCSA202105191059), May 19, 2021: STIFFENER. CRACKED. NOSE WHEEL WELL TOP PANEL STIFFENER CRACKED BETWEEN STA 280 AND 300 LBL 10
- [SDR KCSA202105191058](https://openairdocs.org/sdr/KCSA202105191058), May 19, 2021: WEB. CRACKED. STA 2231 R/H SIDE CRACK FOUND IN WEB BETWEEN STR 21R & 22R
- [SDR KCSA202105191057](https://openairdocs.org/sdr/KCSA202105191057), May 19, 2021: REVEAL. CRACKED. R2 DOOR STA 800 STR 24 DOOR STOP REVEAL IS CRACKED
- [SDR KCSA202009011140](https://openairdocs.org/sdr/KCSA202009011140), Sep 1, 2020: BATTERY PACK. NO TEST. RT UPPER DECK EMERGENCY DOOR BATTERY PACK CHECK FAILED
- [SDR KCSA202005291073](https://openairdocs.org/sdr/KCSA202005291073), May 29, 2020: CAP. CORRODED. LEFT BODY GEAR INBD TRUNNION CAP HAS PITTING AND CORROSION.
- [SDR KCSA201908281206](https://openairdocs.org/sdr/KCSA201908281206), Aug 28, 2019: LIGHT. DIM. CREW EMERGENCY LIGHT L1382 IN COCKPIT VERY DIM
- [SDR KCSA201908281205](https://openairdocs.org/sdr/KCSA201908281205), Aug 28, 2019: LIGHT. INOPERATIVE. UPPER DECK EMERGENCY LIGHT L5604 STA 470 INOP
- [SDR KCSA201908281204](https://openairdocs.org/sdr/KCSA201908281204), Aug 28, 2019: LIGHT. INOPERATIVE. EMERGENCY LIGHT L5734 AT UPPER DECK LADDER INOP

## STCs that may be installed (OpenAirDocs) (3)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the engine (Pratt & Whitney PW4056)

- [STC SE01543CH](https://openairdocs.org/stc/SE01543CH): Replace Hamilton Sundstrand P/N 778839-13, 778839-14, 778839-19, 778839-20, 778839-37, 778839-38, 816682-1, 840618-2, 880724 carbon bushings with Cook Airtomic P/N AIR22947 Slotted Entry Busing in the High Pressure Shutoff Valve. Cook Airtomic
- [STC SE00053AT-D](https://openairdocs.org/stc/SE00053AT-D): Modification of fan exit guide vane, to line replaceable unit configuration. Chromalloy Gas Turbine Corp
- [STC SE00131LA](https://openairdocs.org/stc/SE00131LA): Modification of the subject engines to incorporate an oil tank reservoir insulation blanket in accordance with Hi Temp Insulation Inc. Drawing List 46M1024-301, Revision N/C, dated December 5, 1995, or later FAA approved revision as an acceptable alternate to Pratt & Whitney part number 50R280-01 or 51R059-01 insulation blankets. Hi Temp Insulation Inc

## Earlier aircraft with N709CK

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N709CK before.

- [Cancelled 2015-11-03](https://openairdocs.org/deregistered/N709CK-2015-11-03): Boeing 747-132, S/N 20247, built 1971. Owner: [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti)

## Related

- Other Boeing 747-4B5 aircraft: https://openairdocs.org/model/boeing-747-4b5/aircraft.md
- The Pratt & Whitney PW4056 engine: https://openairdocs.org/engine/pratt-whitney-pw4056.md

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