# Service difficulty reports: N637US, cancelled Sep 30, 2008 A list on [N637US, cancelled Sep 30, 2008](https://openairdocs.org/deregistered/N637US-2008-09-30.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR 0600546637](https://openairdocs.org/sdr/0600546637.md): Battery · discharged · Mar 15, 2006 · N637US · Boeing 747251B · Emergency Lighting > 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.md): Battery · inoperative · May 15, 2004 · N637US · Boeing 747251B · Emergency Lighting > 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.md): Terminal · burned · Feb 5, 2004 · N637US · Boeing 747251B · Ice/Rain Protection System Wiring > 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. AIRCRAFT CONTINUED TO DESTINATION AND LANDED WITHOUT INCIDENT. REPLACED THE LEFT LOWER AND UPPER WIND - [SDR 0202606637](https://openairdocs.org/sdr/0202606637.md): Coffeemaker · malfunctioned · Aug 12, 2002 · N637US · Boeing 747251B · Buffet/Galleys > 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 EMERGENCY AND THE AIRCRAFT CONTINUED TO DESTINATION AND LANDED WITHOUT INCIDENT. REPLACED THE LE - [SDR 0201696637](https://openairdocs.org/sdr/0201696637.md): Video Unit · failed · May 23, 2002 · N637US · Boeing 747251B · Entertainment System > 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.md): Strap · corroded · Jan 26, 2001 · N637US · Boeing 747251B · Fuselage Miscellaneous Structure > DURING M-CHECK FOUND CORROSION ON BULKHEAD SPLICE STRAP AT BS 400. REPAIRED PER EA 66-181942. - [SDR 0100816637](https://openairdocs.org/sdr/0100816637.md): Stringer · corroded · Jan 26, 2001 · N637US · Boeing 747251B · Fuselage Main, Longeron/Stringer > 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.md): Keelbeam · damaged · Jan 4, 2001 · N637US · Boeing 747251B · Fuselage Main, Keel > 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.md): Light · malfunctioned · Oct 30, 2000 · N637US · Boeing 747251B · Emergency Lighting > DURING OVERNIGHT MAINTENANCE LINE CHECK, FOUND ZONE A EMERGENCY LIGHTS ILLUMINATE UNCOMMANDED WHEN FLIGHT DECK SWITCH IS ARMED. MAINTENANCE REPAIRED BROKEN EMERGENCY LIGHTS WIRES AT DOOR 1L PER AMM 33-51-00. OPERATIONAL CHECK GOOD. - [SDR 9904886637](https://openairdocs.org/sdr/9904886637.md): Floorbeam · cracked · Oct 20, 1999 · N637US · Boeing 747251B · Fuselage Main, Floor Beam > 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.md): Rod · disconnected · Sep 28, 1998 · N637US · Boeing 747251B · Landing Gear Door Retract Section > DURING CLIMB, THE RED DOOR OPEN AND GEAR LIGHTS REMAINED ILLUMINATED AFTER LANDING GEAR RETRACTION. RECYCLED LANDING GEAR AND LIGHTS REMAINED ILLUMINATED. AIRCRAFT DUMPED FUEL AND RETURNED TO HNL AND LANDED WITHOUT INCIDENT. RECONNECTED RIGHT WING LANDING G - [SDR 9809796637](https://openairdocs.org/sdr/9809796637.md): Seal · failed · Jul 3, 1998 · N637US · Boeing 747251B · Turbine Engine Accessory Drive > 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. MAINTENANCE REPLACED THE ACCESSORY GEARBOX CARBON SEALS FOR THE HYDRAULIC PUMP AND STARTER. SUBSEQU - [SDR 9809786637](https://openairdocs.org/sdr/9809786637.md): Pump · failed · Jul 1, 1998 · N637US · Boeing 747251B · Turbine Engine Oil System > 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 CONTINUED TO SIN AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE ENGINE OIL SCAVENGE PUMP - [SDR 9713126637](https://openairdocs.org/sdr/9713126637.md): Compressor · stalled · Jul 1, 1997 · N637US · Boeing 747251B · Turbine Engine Compressor Section > 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 WAS NORMAL. MAINTENANCE RAN ENGINE WITH NO DEFECTS NOTED. EXACT PART CAUSING PROBLEM TO BE DETE - [SDR 9713076637](https://openairdocs.org/sdr/9713076637.md): Compressor · stalled · Jul 1, 1997 · N637US · Boeing 747251B · Turbine Engine Compressor Section > 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 SECOND START, ENGINE OPERATION WAS NORMAL. MAINTENANCE RAN ENGINE WITH NO DEFECTS. EXACT PART CAUSIN - [SDR 9627746637](https://openairdocs.org/sdr/9627746637.md): Fitting · cracked · Dec 21, 1996 · N637US · Boeing 747251B · Nacelle/Pylon Structure > DURING PERIODIC CHECK, FOUND THE FORWARD LOWER INBOARD MIDSPAR FITTING CRACKED AT SECOND FROM AFT INBOARD FASTENER HOLE TO INBOARD EDGE OF FITTING. REPLACED FITTING. WORK COMPLETED ON CITEXT 66-5441-1-0088, FM 65 THROUGH FM 72 REPLACEMENT PROCEDURE, DRAWING - [SDR 9621836637](https://openairdocs.org/sdr/9621836637.md): Coupling · cracked · Oct 12, 1996 · N637US · Boeing 747251B · Pneumatic Distribution System > 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 FURTHER INCIDENT. REPLACED THE 15TH STAGE COUPLING, HIGH STAGE VALVE, TWO DUCTS FORWARD OF HIGH P - [SDR 9618426637](https://openairdocs.org/sdr/9618426637.md): Compressor · stalled · Aug 24, 1996 · N637US · Boeing 747251B · Turbine Engine Compressor Section > 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 ENGINE STALLED AGAIN. HOWEVER, ENGINE SHUTDOWN WAS NOT ACCOMPLISHED. FLIGHT CONTINUED TO HKG WITHO - [SDR 9617686637](https://openairdocs.org/sdr/9617686637.md): Y-Duct · cracked · Aug 12, 1996 · N637US · Boeing 747251B · Pneumatic Distribution System > DURING TAKEOFF, THE NR 3 FIRE WARNING LIGHT ILLUMINATED ACCOMPANIED BY HIGH NACELLE TEMPERATURE INDICATIONS. AIRCRAFT ABORTED TAKEOFF AND RETURNED TO GATE. FOUND CRACK IN Y-DUCT AT PYLON AREA. REPAIRED DUCT AND REPLACED HIGH STAGE VALVE AND CONTROLLER, OPER - [SDR 9615086637](https://openairdocs.org/sdr/9615086637.md): Compressor · stalled · Jul 13, 1996 · N637US · Boeing 747251B · Turbine Engine Compressor Section > 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 CONTINUED TO AMS WITHOUT FURTHER INCIDENT. BORESCOPE INSPECTION OF HIGH PRESSURE COMPRESSOR REVEALED - [SDR 9512536637](https://openairdocs.org/sdr/9512536637.md): Bleed Valve · malfunctioned · Aug 13, 1995 · N637US · Boeing 747251B · Compressor Bleed Valve > 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 GONE TO 715 DEGREES FOR 15 SECONDS AND A BORESCOPE INSPECTION WAS PERFORMED. THE HIGH STAGE BLEED VAL - [SDR 9508636637](https://openairdocs.org/sdr/9508636637.md): Ins · malfunctioned · May 27, 1995 · N637US · Boeing 747251B · Inertial Guidance System > 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 REPLACED THE NR 1 INS AND PERFORMED CHECK, CHECK WAS NORMAL. THE NR 1 INS RED WARNING LIGHT ILLU ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet' WHERE n_number = 'N637US' AND deregistration_id = 'N637US-2008-09-30' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/deregistered/N637US-2008-09-30/reports --- 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.