# N637US: 1986 Boeing 747-251B, registration cancelled 2008-09-30 - Type: Cancelled registration (FAA registry, deregistered aircraft) - Cancelled: September 30, 2008 - Exported to: Nigeria - Status when cancelled: Valid registration - Airframe: [Boeing 747-251B](https://openairdocs.org/model/boeing-747-251b) (registry code 1384892) - Engine: [Pratt & Whitney JT9D series](https://openairdocs.org/engine/pratt-whitney-jt9d-series) (registry code 52054) - Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE) (OpenAirDocs) - Serial number: 23548 - Year built: 1986 - Type of aircraft: Fixed wing multi engine - Engine type: Turbo-fan - Airworthiness: Standard, transport - Airworthiness date: October 28, 1999 - Certificate issued: May 16, 2008 - Last registry action: July 22, 2008 - Mode S code: A85990 - Owner when cancelled: [N637us Inc](https://openairdocs.org/faa-owner/N637US%20INC) - Location: [Miami, FL](https://openairdocs.org/faa-place/FL/Miami) - Owner type: Corporation - Owner's area on the map: 25.7655° N, 80.1843° W: Placed by OpenAirDocs at the center of ZIP code 33131, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based - The mark today: https://openairdocs.org/aircraft/N637US - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=637US - Page: https://openairdocs.org/deregistered/N637US-2008-09-30 From the FAA registry file of October 29, 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 747-251B: https://openairdocs.org/model/boeing-747-251b.md ## Service difficulty reports (22) Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. - [SDR 0600546637](https://openairdocs.org/sdr/0600546637), Mar 15, 2006: BATTERY. DISCHARGED. DURING LINE CHECK, FOUND DR 1L UPPER EMERGENCY LIGHTS INOP. REPLACED LIGHT ASSEMBLY AND BATTERIES. OPERATIONAL CHECK GOOD. A/C RETURNED TO SERVICE. - [SDR 0400806637](https://openairdocs.org/sdr/0400806637), May 15, 2004: BATTERY. INOPERATIVE. DURING LINE CHECK, FOUND ZONE-A FLOOR PATH EMERGENCY LIGHTS INOPERATIVE. REPLACED EMERGENCY LIGHT BATTERY. OPERATIONAL CHECK GOOD. - [SDR 0400216637](https://openairdocs.org/sdr/0400216637), Feb 5, 2004: TERMINAL. BURNED. DURING CLIMB, A STRONG BURNING ODOR EMITTED FROM THE CAPTAIN'S L1 LOWER LEFT WINDOW HEAT ELECTRICAL CONNECTIONS. PLACED L1 IN OVERRIDE AND ODOR DISSIPATED. AIRC - [SDR 0202606637](https://openairdocs.org/sdr/0202606637), Aug 12, 2002: COFFEEMAKER. MALFUNCTIONED. DURING CRUISE, A BURNING SMELL EMITTED NEAR THE NR 3 GALLEY. DEACTIVATED THE NR 3 GALLEY, GASPER FAN AND RECIRCULATION FAN AND THE SMELL DISSIPATED. DECLARED AN - [SDR 0201696637](https://openairdocs.org/sdr/0201696637), May 23, 2002: VIDEO UNIT. FAILED. NR 2 VTR OVERHEATS AND SMELLS LIKE BURNING WIRE. FLIGHT CONTINUED TO NRT AND LANDED WITHOUT INCIDENT. REPLACED NR 2 VTR. OPERATIONAL CHECK OK. - [SDR 0100946637](https://openairdocs.org/sdr/0100946637), Jan 26, 2001: STRAP. CORRODED. DURING M-CHECK FOUND CORROSION ON BULKHEAD SPLICE STRAP AT BS 400. REPAIRED PER EA 66-181942. - [SDR 0100816637](https://openairdocs.org/sdr/0100816637), Jan 26, 2001: STRINGER. CORRODED. DURING M-CHECK, FOUND CORROSION ON INBOARD VERTICAL SURFACE OF STRINGER AT STATION 2203, STR 51 L. REPAIRED PER EA 66-180581. - [SDR 0100826637](https://openairdocs.org/sdr/0100826637), Jan 4, 2001: KEELBEAM. DAMAGED. DURING M-CHECK FOUND DAMAGE TO LOWER KEEL BEAM AT STATION 1325, RBL 5. REPAIRED PER EA 66-180576. - [SDR 0004046637](https://openairdocs.org/sdr/0004046637), Oct 30, 2000: LIGHT. MALFUNCTIONED. DURING OVERNIGHT MAINTENANCE LINE CHECK, FOUND ZONE A EMERGENCY LIGHTS ILLUMINATE UNCOMMANDED WHEN FLIGHT DECK SWITCH IS ARMED. MAINTENANCE REPAIRED BROKEN EMER - [SDR 9904886637](https://openairdocs.org/sdr/9904886637), Oct 20, 1999: FLOORBEAM. CRACKED. DURING PERIODIC CHECK, FOUND CRACK IN FORWARD CARGO FLOORBEAM UPPER 'T' CHORD FS 700, LBL 26. REPAIRED PER EA 66-171312. - [SDR 9810136637](https://openairdocs.org/sdr/9810136637), Sep 28, 1998: ROD. DISCONNECTED. DURING CLIMB, THE RED DOOR OPEN AND GEAR LIGHTS REMAINED ILLUMINATED AFTER LANDING GEAR RETRACTION. RECYCLED LANDING GEAR AND LIGHTS REMAINED ILLUMINATED. AIRCR - [SDR 9809796637](https://openairdocs.org/sdr/9809796637), Jul 3, 1998: SEAL. FAILED. WHILE IN CRUISE FLIGHT, THE NR 1 ENGINE OIL QUANTITY AND PRESSURE DROPPED. THE ENGINE WAS SHUT DOWN AND THE FLIGHT CONTINUED TO NRT WITHOUT FURTHER INCIDENT. MA - [SDR 9809786637](https://openairdocs.org/sdr/9809786637), Jul 1, 1998: PUMP. FAILED. WHILE IN CRUISE FLIGHT, THE NR 1 ENGINE OIL QUANTITY BEGAN TO DECREASE. THE ENGINE WAS SHUT DOWN WHEN THE INDICATED OIL QUANTITY WAS ONE-HALF GALLON. THE FLIGHT - [SDR 9713126637](https://openairdocs.org/sdr/9713126637), Jul 1, 1997: COMPRESSOR. STALLED. AFTER STARTING AND WITH ENGINE STABLE AT IDLE, THE NR 4 ENGINE COMPRESSOR STALLED. N1, N2, AND OIL PRESSURE DROPPED WITH EGT RISING TO 490 CELSIUS. SECOND START - [SDR 9713076637](https://openairdocs.org/sdr/9713076637), Jul 1, 1997: COMPRESSOR. STALLED. AFTER STARTING AND WITH ENGINE STABLE AT IDLE, THE NR 1 ENGINE COMPRESSOR STALLED. N1, N2, AND OIL PRESSURE DECREASED WITH EGT RISING TO 490 CELSIUS. AFTER SECO - [SDR 9627746637](https://openairdocs.org/sdr/9627746637), Dec 21, 1996: FITTING. CRACKED. DURING PERIODIC CHECK, FOUND THE FORWARD LOWER INBOARD MIDSPAR FITTING CRACKED AT SECOND FROM AFT INBOARD FASTENER HOLE TO INBOARD EDGE OF FITTING. REPLACED FIT - [SDR 9621836637](https://openairdocs.org/sdr/9621836637), Oct 12, 1996: COUPLING. CRACKED. DURING TAKEOFF AND CLIMB, THE NR 1 ENGINE EPR AND N1 DROPPED AND THE FIRE LIGHT ILLUMINATED. SHUT DOWN NR 1 ENGINE AND RETURNED TO DTW. AIRCRAFT LANDED WITHOUT - [SDR 9618426637](https://openairdocs.org/sdr/9618426637), Aug 24, 1996: COMPRESSOR. STALLED. DURING INITIAL CLIMB, THE NR 3 ENGINE EXPERIENCED A COMPRESSOR STALL. THE ENGINE WAS SHUTDOWN AND RESTARTED. FLIGHT CONTINUED AND AT TOP OF DESCENT, THE NR 3 EN - [SDR 9617686637](https://openairdocs.org/sdr/9617686637), Aug 12, 1996: Y-DUCT. CRACKED. DURING TAKEOFF, THE NR 3 FIRE WARNING LIGHT ILLUMINATED ACCOMPANIED BY HIGH NACELLE TEMPERATURE INDICATIONS. AIRCRAFT ABORTED TAKEOFF AND RETURNED TO GATE. FOUN - [SDR 9615086637](https://openairdocs.org/sdr/9615086637), Jul 13, 1996: COMPRESSOR. STALLED. DURING CLIMB, THE NR 2 ENGINE EXPERIENCED A COMPRESSOR STALL. WITH NO SPIKE IN EGT AND ALL ENGINE INDICATIONS BEING NORMAL, CREW FOLLOWED COM PROCEDURES AND CON - [SDR 9512536637](https://openairdocs.org/sdr/9512536637), Aug 13, 1995: BLEED VALVE. MALFUNCTIONED. DURING TAKEOFF THE NR 3 ENGINE EXPERIENCED A FIRE WARNING WITH THE NACELLE TEMPERATURES GOING INTO THE RED AND AT 115 KNOTS TAKEOFF WAS ABORTED. THE EGT HAD GON - [SDR 9508636637](https://openairdocs.org/sdr/9508636637), May 27, 1995: INS. MALFUNCTIONED. DURING CRUISE, THE NR 1 AND NR 2 INS RED WARNING LIGHT ILLUMINATED CONSECUTIVELY. CREW FOLLOWED COCKPIT OPERATING MANUAL AND DIVERTED FLIGHT TO ANC. MAINTENANCE ## NTSB investigations (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB DCA94RA037](https://openairdocs.org/ntsb/DCA94RA037), Mar 1, 1994: Boeing 747 (N637US), Narita, Japan ## 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 19920714030239I](https://openairdocs.org/incident/19920714030239I), Jul 14, 1992: Boeing 747251B (N637US), Singapore, MY. NR2 and NR3 engine compressor stalls. Flameouts. Restarted at lower altitude. NR3 engine changed. NR2 re-rigged. --- 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.