# N51SW: Boeing 737-2H4, registration cancelled 1999-03-23

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: March 23, 1999
- Exported to: Philippines
- Status when cancelled: Valid registration
- Airframe: [Boeing 737-2H4](https://openairdocs.org/model/boeing-737-2h4) (registry code 138448C)
- Serial number: 21448
- Type of aircraft: Fixed wing multi engine
- Certificate issued: February 18, 1999
- Last registry action: February 19, 1999
- Mode S code: A660BB
- Owner when cancelled: [Aar Aircraft & Engine Group Inc](https://openairdocs.org/faa-owner/AAR%20AIRCRAFT%20%26%20ENGINE%20GROUP%20INC)
- Location: [Wood Dale, IL](https://openairdocs.org/faa-place/IL/Wood%20Dale)
- Owner type: Corporation
- Owner's area on the map: 41.9744° N, 87.9865° W: Placed by OpenAirDocs at the center of ZIP code 60191, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N51SW
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=51SW
- Page: https://openairdocs.org/deregistered/N51SW-1999-03-23

From the FAA registry file of October 28, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Boeing 737-2H4: https://openairdocs.org/model/boeing-737-2h4.md

## Service difficulty reports (49)

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

- [SDR SWAA982987](https://openairdocs.org/sdr/SWAA982987), Nov 20, 1998: FUEL PUMP. FAILED. ON TAKEOFF ROLL, NR 1 ENGINE ROLLED BACK APPROX 10 PERCENT. NR 1 THROTTLE WAS PUSHED UP AND ALL INDICATIONS WERE NORMAL. ON CLIMBOUT, THE THROTTLES WERE SPLIT A
- [SDR SWAA970981](https://openairdocs.org/sdr/SWAA970981), Nov 8, 1997: SLIDE. LOW PRESS. DURING TERMINAL CHECK, FOUND AFT ENTRY DOOR SLIDE PRESSURE BELOW MINIMUM. REPLACED SLIDE ASSEMBLY PER BOEING M/M.
- [SDR SWAA970895](https://openairdocs.org/sdr/SWAA970895), Oct 8, 1997: FRAME. CRACKED. DURING SCHEDULED D-CHECK, FOUND FRAME CRACKED AT BS 947, ABOVE S19L. REPLACED PER BOEING SRM.
- [SDR SWAA970894](https://openairdocs.org/sdr/SWAA970894), Oct 8, 1997: CHANNEL. CRACKED. DURING SCHEDULED D-CHECK, FOUND U-CHANNELS CRACKED AT BS 359 AND 349 TO 360. REPLACED PER BOEING SRM.
- [SDR SWAA970893](https://openairdocs.org/sdr/SWAA970893), Oct 8, 1997: WEB. CORRODED. DURING SCHEDULED D-CHECK, FOUND CREASE BEAM WEB CORRODED AT BS 937 TO 942. REPLACED PER BOEING SRM.
- [SDR SWAA970892](https://openairdocs.org/sdr/SWAA970892), Oct 8, 1997: CLIP. CRACKED. DURING SCHEDULED D-CHECK, FOUND STRINGER CLIP CRACKED AT BS 380, S26L, AND BS 827,S19L. REPLACED PER BOEING SRM.
- [SDR SWAA970891](https://openairdocs.org/sdr/SWAA970891), Oct 8, 1997: CHORD. CRACKED. DURING SCHEDULED D-CHECK, FOUND FAIL-SAFE CHORD CRACKED AT BS 400. REPAIRED PER BOEING SRM.
- [SDR SWAA970890](https://openairdocs.org/sdr/SWAA970890), Oct 8, 1997: FLOORBEAM. CORRODED. DURING SCHEDULED D-CHECK, FOUND FLOORBEAM CORROSION AT BS 1006. REPAIRED PER BOEING SRM.
- [SDR SWAA970889](https://openairdocs.org/sdr/SWAA970889), Oct 8, 1997: STRINGER. CORRODED. DURING SCHEDULED D-CHECK, FOUND STRINGER 20R CORRODED AT BS 953. REPLACED SECTION PER BOEING SRM.
- [SDR SWAA970888](https://openairdocs.org/sdr/SWAA970888), Oct 8, 1997: SHEAR TIE. CRACKED. DURING SCHEDULED D-CHECK, FOUND SHEAR TIES CRACKED AT BS 360 BELOW S14L, AT BS 520, ABOVE S22L AND BETWEEN S27R AND 28R. REPAIRED PER BOEING SRM.
- [SDR SWAA970887](https://openairdocs.org/sdr/SWAA970887), Oct 8, 1997: SUPPORT. CORRODED. DURING SCHEDULED D-CHECK, FOUND FLOOR SUPPORT CORRODED AT BS 987 TO 1006, BL 0. REPAIRED PER BOEING SRM.
- [SDR SWAA970886](https://openairdocs.org/sdr/SWAA970886), Oct 8, 1997: SKIN. DAMAGED. DURING SCHEDULED D-CHECK, FOUND DAMAGE TO SKIN AT BS 266, BELOW S4L. REPAIRED PER BOEING SRM.
- [SDR SWAA970885](https://openairdocs.org/sdr/SWAA970885), Oct 8, 1997: SHEAR TIE. DAMAGED. DURING SCHEDULED D-CHECK, FOUND SHEAR TIE DAMAGE AT BS 400, BETWEEN S22L AND 23L. REPAIRED PER BOEING SRM.
- [SDR SWAA970884](https://openairdocs.org/sdr/SWAA970884), Oct 8, 1997: SKIN. CORRODED. DURING SCHEDULED D-CHECK, FOUND UNDERSIDE OF BS 373 TO 376 CORRODED AT S24L. REPAIRED PER BOEING SRM.
- [SDR SWAA970883](https://openairdocs.org/sdr/SWAA970883), Oct 8, 1997: BATTERY. DISCHARGED. DURING SCHEDULED D-CHECK, FOUND OVERWING EMERGENCY EXIT LIGHTS INOP. REPLACED BATTERY PACK PER BOEING M/M.
- [SDR SWAA970882](https://openairdocs.org/sdr/SWAA970882), Oct 8, 1997: SKIN. DENTED. DURING SCHEDULED D-CHECK, FOUND SHARP DENT ON VERTICAL FIN AT FS 287. REPAIRED PER BOEING SRM.
- [SDR SWAA970868](https://openairdocs.org/sdr/SWAA970868), Sep 22, 1997: BULKHEAD. CRACKED. DURING SCHEDULED C4 CHECK, FOUND AFT PRESSURE BULKHEAD AT BS 1016 OIL CANNING. REPAIRED PER BOEING SRM.
- [SDR SWAA970642](https://openairdocs.org/sdr/SWAA970642), Aug 3, 1997: SKIN. CRACKED. DURING SCHEDULED TERM CHECK, FOUND A 2 INCH CRACK SKIN CRACK AT BS 870, S24R. REPAIRED PER BOEING SRM.
- [SDR SWAA970435](https://openairdocs.org/sdr/SWAA970435), May 6, 1997: BATTERY. DISCHARGED. DURING SCHEDULED A1 CHECK, FOUND AFT SLIDE EMERGENCY EXIT LIGHT INOP. REPLACED BATTERY PACK AND HOUSING PER BOEING M/M.
- [SDR SWAA970022](https://openairdocs.org/sdr/SWAA970022), Jan 1, 1997: SKIN. CRACKED. DURING SCHEDULED SERVICE CHECK, FOUND A .5 INCH CRACK IN NR 3 LT WINDOW BELT UPPER FWD CORNER, BS 405. REPAIRED PER SWA RA 1-253-1581.
- [SDR SWAA970021](https://openairdocs.org/sdr/SWAA970021), Jan 1, 1997: SKIN. CRACKED. DURING SCHEDULED SERVICE CHECK, FOUND A 1 INCH CRACK IN NR 2 LT WINDOW BELT UPPER FWD CORNER, BS 385. REPAIRED PER SWA RA 1-253-1581.
- [SDR SWAA970020](https://openairdocs.org/sdr/SWAA970020), Jan 1, 1997: SKIN. CRACKED. DURING SCHEDULED SERVICE CHECK, FOUND A .5 CRACK IN NR 1 LT WINDOW BELT SKIN AT LOWER AFT CORNER, BS 375. REPAIRED PER SWA RA 1-253-1581.
- [SDR SWAA970019](https://openairdocs.org/sdr/SWAA970019), Jan 1, 1997: SKIN. CRACKED. DURING SCHEDULED SERVICE CHECK, FOUND NR 4 LEFT WINDOW CRACKED AT UPPER FWD CORNER FASTENER. REPAIRED PER SWA RA 1-253-1581.
- [SDR SWAA961289](https://openairdocs.org/sdr/SWAA961289), Dec 2, 1996: SKIN. CRACKED. DURING SCHEDULED A1 CHECK, FOUND FUSELAGE SKIN AT LOWER FWD CORNER OF AFT CARGO DOOR CUTOUT CRACKED 3 INCHES. REPAIRED PER SWA RA 1-253-1551 AND BOEING SRM.
- [SDR SWAA961026](https://openairdocs.org/sdr/SWAA961026), Sep 28, 1996: LIGHT. INOPERATIVE. DURING SCHEDULED SERVICE CHECK, FOUND RT AFT ENTRY DOOR OVERHEAD EMERGENCY EXIT LIGHTS INOPERATIVE. REPLACED LIGHT ASSEMBLY PER BOEING M/M.
- [SDR SWAA961009](https://openairdocs.org/sdr/SWAA961009), Sep 25, 1996: STRINGER. CORRODED. DURING SCHEDULED C4 CHECK, FOUND S27L CORRODED AT BS 1006. REPAIRED PER BOEING M/M.
- [SDR SWAA960942](https://openairdocs.org/sdr/SWAA960942), Sep 9, 1996: BEAM. CRACKED. DURING SCHEDULED SERVICE CHECK, FOUND TRANSVERSE BEAM CRACKED FWD SIDE AT BS 707 RBL 1. REPAIRED PER SWA RA 1-257-0346.
- [SDR SWAA960867](https://openairdocs.org/sdr/SWAA960867), Aug 23, 1996: BEAM. CRACKED. DURING SCHEDULED SERVICE CHECK, FOUND TRANSVERSE BEAM CRACKED FWD SIDE OF BS 707, LBL 1. REPAIRED PER SWA RA 1-257-0346.
- [SDR SWAA960866](https://openairdocs.org/sdr/SWAA960866), Aug 23, 1996: BEAM. CRACKED. DURING SCHEDULED SERVICE CHECK, FOUND TRANSVERSE BEAM CRACKED FWD SIDE OF BS 707, RBL 1. REPAIRED PER SWA RA 1-257-0346.
- [SDR SWAA960853](https://openairdocs.org/sdr/SWAA960853), Aug 21, 1996: SENSOR. INOPERATIVE. AIRCRAFT RETURNED TO DAL DUE TO RIGHT PACK TRIPPING AND UNABLE TO CONTROL CABIN PRESSURE. REMOVED AND REPLACED 450 DEGREE SENSOR, RT RAM AIR SENSOR AND PERFORME
- [SDR SWAA960816](https://openairdocs.org/sdr/SWAA960816), Aug 14, 1996: CONNECTOR. BROKEN. DURING SCHEDULED A1 CHECK, FOUND EXTERIOR EMERGENCY LIGHTING INOP AT FWD SERVICE DOOR. REPAIRED CONNECTOR AT SOCKET AND OP CHECKED PER BOEING M/M.
- [SDR SWAA960647](https://openairdocs.org/sdr/SWAA960647), Jul 8, 1996: ACTUATOR. FAILED. AFTER TAKEOFF, NUMBER 1 L/E SLAT WOULD NOT RETRACT. AIRCRAFT RETURNED TO MCO AND MADE AN UNEVENTFUL LANDING. REPLACED SLAT ACTUATOR AND LEAK CHECKED PER BOEING 
- [SDR SWAA960187](https://openairdocs.org/sdr/SWAA960187), Mar 28, 1996: SKIN. CRACKED. DURING SCHEDULED C2 CHECK, FOUND FWD LEFT FUSELAGE SKIN CRACKED 2 INCHES AT BS 380 S24L. REPAIRED PER BOEING SRM.
- [SDR SWAA960016](https://openairdocs.org/sdr/SWAA960016), Jan 12, 1996: T-STRIP. CRACKED. DURING SCHEDULED MAINT CHECK, FOUND T-STRIP CRACKED ABOVE FWD UPPER AIRSTAIR DOORWAY STOP IN SEVERAL PLACES. REPAIRED T-STRIP PER BOEING SRM.
- [SDR SWAA950601](https://openairdocs.org/sdr/SWAA950601), Aug 25, 1995: FIRE LOOP. MALFUNCTIONED. DURING CLIMBOUT, CREW EXPERIENCED APU FIRE WARNING AND THE APU WAS OFF. FIRE BOTTLE WAS ACTIVATED AND THE FIRE WARNING LIGHT REMAINED ILLUMINATED. AIRCRAFT RETU
- [SDR SWAA950609](https://openairdocs.org/sdr/SWAA950609), Aug 19, 1995: BLKHD STRAP. CRACKED. DURING SCHEDULED 1/4 D-CHECK, FOUND WEB AND STRAP CRACKS AT BS 178 BULKHEAD, INBOARD ROW OF FASTENERS, LBL 5.7 FROM WL 184 TO 201. REPAIRED PER BOEING STRUCTURA
- [SDR SWAA950608](https://openairdocs.org/sdr/SWAA950608), Aug 19, 1995: BLKHD WEB. CRACKED. DURING SCHEDULED 1/4 D-CHECK, FOUND WEB AND STRAP CRACKS AT BS 178 BULKHEAD, INBOARD ROW OF FASTENERS, RBL 5.7 FROM WL 184 TO 201. REPAIRED PER BOEING STRUCTURA
- [SDR SWAA950607](https://openairdocs.org/sdr/SWAA950607), Aug 19, 1995: BLKHD T-CHORD. CRACKED. DURING SCHEDULED 1/4 D-CHECK, FOUND TWO CRACKS AT T-CHORD BS 178 BULKHEAD AFT SIDE, WL 184, ONE I/B AND ONE O/B. REPAIRED PER BOEING STRUCTURAL REPAIR MANUAL.
- [SDR SWAA950606](https://openairdocs.org/sdr/SWAA950606), Aug 19, 1995: NLG PANEL. CRACKED. DURING SCHEDULED 1/4 D-CHECK, FOUND NOSE WHEEL WELL CEILING CRACKED AT SPRING ATTACH POINT, BS 277 RBL 10. REPAIRED PER BOEING STRUCTURAL REPAIR MANUAL.
- [SDR SWAA950605](https://openairdocs.org/sdr/SWAA950605), Aug 19, 1995: ANGLE. CRACKED. DURING SCHEDULED 1/4 D-CHECK, FOUND CHORD CRACKED IN AFT EDGE AT I/B FASTENER OF 18A CHORD ANGLE, LEFT MAIN WHEEL WELL, BS 727 S18A. INSTALLED CHORD ANGLE REPAI
- [SDR SWAA950572](https://openairdocs.org/sdr/SWAA950572), Aug 14, 1995: FIRE CONTL PNL. MALFUNCTIONED. AFTER TAKEOFF, EXPERIENCED APU FIRE WARNING. CREW ACTIVATED APU FIRE BOTTLE, FIRE WARNING LIGHT EXTINGUISHED. AIRCRAFT RETURNED TO LBB AND MADE AN UNEVENTFUL LA
- [SDR SWAA950152](https://openairdocs.org/sdr/SWAA950152), Feb 3, 1995: SKIN. CRACKED. DURING SPECIAL VISIT FOR SKIN LAP INSPECTION, FOUND CRACK INDICATIONS FROM BS 267 TO 328, STRINGER 24R, ON BACK SIDE OF EXISTING REPAIR. REMOVED EXISTING REPAIR
- [SDR SWAA950151](https://openairdocs.org/sdr/SWAA950151), Feb 3, 1995: SKIN. CRACKED. DURING SPECIAL VISIT FOR SKIN LAP INSPECTION, FOUND CRACK INDICATION AT BS 351, AND 381, STRINGER 14R. REPAIRED PER TRAMCO EWO 95-0115.
- [SDR SWAA950150](https://openairdocs.org/sdr/SWAA950150), Feb 3, 1995: STIFFENER. CRACKED. DURING SPECIAL VISIT FOR SKIN LAP INSPECTION, FOUND CRACK INDICATION AT VERTICAL STIFFENER, BS 178, WL 181-184, LBL 8. REPAIRED PER BOEING STRUCTURAL REPAIR MAN
- [SDR SWAA950149](https://openairdocs.org/sdr/SWAA950149), Feb 3, 1995: BULKHEAD. CRACKED. DURING SPECIAL VISIT FOR SKIN LAP INSPECTION, FOUND CRACK INDICATIONS AT BS 178, WL 184, LBL 5.7, PRESSURE BULKHEAD, AT FASTENER HOLES. REPAIRED PER TRAMCO EWO 
- [SDR SWAA950148](https://openairdocs.org/sdr/SWAA950148), Feb 3, 1995: SKIN. CRACKED. DURING SPECIAL VISIT FOR SKIN LAP INSPECTION, FOUND CRACK INDICATIONS AT BS 469, AND AT 500A+9, STRINGER 4L. REPAIRED PER TRAMCO EWO 95-0115.
- [SDR SWAA950147](https://openairdocs.org/sdr/SWAA950147), Feb 3, 1995: SKIN. CRACKED. DURING SPECIAL VISIT FOR SKIN LAP INSPECTION, FOUND CRACK INDICATIONS AT BS 276, 277, 286, 287, 380, 381, 400, 401, 410, 411, 420, 421, 430, 440, 441, 450, 460,
- [SDR SWAA950146](https://openairdocs.org/sdr/SWAA950146), Feb 3, 1995: SKIN. CRACKED. DURING SPECIAL VISIT FOR SKIN LAP INSPECTION, FOUND CRACK INDICATIONS AT BS 389, 390, 399, 409, 410, 419, 500, 500+9, 500A+10, 500A+19, 500B, 500B+9, 500B+10, 5
- [SDR SWAA950145](https://openairdocs.org/sdr/SWAA950145), Feb 3, 1995: SKIN. CRACKED. DURING SPECIAL VISIT FOR SKIN LAP INSPECTION, FOUND CRACK INDICATIONS AT BS 391, 421, 431, 441, 461, 500A, AND 500A+1, 500B, 500B+1, 530, AT STRINGER 10R. REPAI

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Incident 19800310031329I](https://openairdocs.org/incident/19800310031329I), Mar 10, 1980: Boeing 7372H4 (N51SW), Houston, TX. Unable to extend landing flaps. Flap motor circuit breaker popped.

## Other aircraft with N51SW

- [Registered now](https://openairdocs.org/aircraft/N51SW): Piper PA-28-236, S/N 28-8111048, built 1981

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