# Service difficulty reports: N477AS

A list on [N477AS](https://openairdocs.org/aircraft/N477AS.md).

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

Page 1 of 4 · 175 reports

- [SDR ASAA2026071967477](https://openairdocs.org/sdr/ASAA2026071967477.md): Light · detached · Jul 19, 2026 · N477AS · Boeing 737990ER · Emergency Lighting
  > FA REPORTS LIGHT FROM CEILING FELL OUT AND IS DANGLING (EMERGENCY LIGHT). GROUNDED - YES. REMOVED, REPLACED, AND TESTED EMERGENCY LIGHT AISLE LIGHT ABOVE ROW 25 RIGHT PER AMM 33-51-03-960-805 - OPS NORMAL.
- [SDR ASAA2025061558784](https://openairdocs.org/sdr/ASAA2025061558784.md): Lens · missing · Jun 15, 2025 · N477AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHT ON CEILING NEAR ROW 21 MISSING COVER. GROUNDED - YES. EMERGENCY EXIT AISLE LIGHT AT ROW 21 LENS REPLACED REF AMM 33-51-03-960-803. ALL OPS CHECKS GOOD.
- [SDR ASAA2025020655849](https://openairdocs.org/sdr/ASAA2025020655849.md): Door · unknown · Feb 6, 2025 · N477AS · Boeing 737990ER · Passenger/Crew Doors
  > FA'S REPORT L1 DOOR DIFFICULT TO OPEN AND CLOSE. GROUNDED - YES. CLOSED FWD ENTRY DOOR, NO FAULTS NOTED. OPENED FWD ENTRY DOOR, NO FAULTS NOTED REF AMM 52-11-00/201 REF FIM 52-10 TASK 807 CONDUCTED FWD ENTRY DOOR CHECK GVI WITHOUT REMOVAL OF DOOR LINING, NO FA
- [SDR ASAA2024120354283](https://openairdocs.org/sdr/ASAA2024120354283.md): Power Supply · no test · Dec 3, 2024 · N477AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHTS ASSOCIATED WITH BATTERY PACK M2626 ARE INOP. GROUNDED - YES. REMOVED AND REPLACED POWER SUPPLY M2626 AND OPS CHECK GOOD IAW B737 AMM 33-51-06. (S/N 103438)
- [SDR ASAA2024120354262](https://openairdocs.org/sdr/ASAA2024120354262.md): Power Supply · no test · Dec 3, 2024 · N477AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHTS ASSOCIATED WITH BATTERY PACK M1695 ARE INOP. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK SUPPLY M1695 S/N 123358 AND OPERATIONAL TEST PERFORMED SUCCESSFULLY IAW B737-900 AMM 33-51-06-960-806.
- [SDR ASAA2024120354261](https://openairdocs.org/sdr/ASAA2024120354261.md): Power Supply · no test · Dec 3, 2024 · N477AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHTS ASSOCIATED WITH BATTERY PACK M1676 ARE INOP. GROUNDED - YES. REMOVED AND REPLACED POWER SUPPLY M1676 S/N 24289 AND OPS CHECK GOOD IAW B737 AMM 33-51-06.
- [SDR ASAA2024120354260](https://openairdocs.org/sdr/ASAA2024120354260.md): Power Supply · no test · Dec 3, 2024 · N477AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHTS ASSOCIATED WITH BATTERY PACK M2335 ARE INOP. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK M2335 S/N 122986 AND OPERATIONAL TEST PERFORMED SUCCESSFULLY IAW B737-900 AMM 33-51-06-960-806.
- [SDR ASAA2024111554258](https://openairdocs.org/sdr/ASAA2024111554258.md): Web · corroded · Nov 15, 2024 · N477AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO PIT THRESHOLD WEB HAS MULTIPLE SPOTS OF CORROSION. GROUNDED - YES. REMOVED CORROSION FROM AFT CARGO PIT THRESHOLD WEB. ORIG.050",REMOVED.007" REMAINING.043. FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-60-15-1A-1. REMOVED WEB IAW B737-900 SRM 51-4
- [SDR ASAA2024111554257](https://openairdocs.org/sdr/ASAA2024111554257.md): Web · corroded · Nov 15, 2024 · N477AS · Boeing 737990ER · Fuselage Main, Structure
  > FWD CARGO PIT THRESHOLD WEB HAS MULTIPLE SPOTS OF CORROSION. GROUNDED - YES. REMOVED CORROSION ORIGINAL MATERIAL THICK.045" REMOVED.009" REMAINING.036" FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-30-15-1A-1. LOCATED AND DRILLED NEW FWD CARGO DOOR THRESH
- [SDR ASAA2024111254284](https://openairdocs.org/sdr/ASAA2024111254284.md): Doubler · gouged · Nov 12, 2024 · N477AS · Boeing 737990ER · Fluid Service Doors
  > WATER SERVICE DOOR AFT LATCH CONTACT AREA ON INTERNAL SURFACE OF CUTOUT IS GOUGED. GROUNDED - YES. REMOVED AND REPLACED WATER SERVICE DOOR DOUBLER AND COMPLIED WITH EA900ER-53EA-27894 REPAIR.
- [SDR ASAA2024111054282](https://openairdocs.org/sdr/ASAA2024111054282.md): Power Supply · no test · Nov 10, 2024 · N477AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHTS ASSOCIATED WITH POWER SUPPLY M2816 ARE INOP. GROUNDED - YES. REMOVED AND REPLACED POWER SUPPLY M2816 AND OPERATIONAL TEST PERFORMED SUCCESSFULLY IAW B737-900 AMM 33-51-06-960-806. (S/N 125216)
- [SDR ASAA2024111054281](https://openairdocs.org/sdr/ASAA2024111054281.md): Power Supply · no test · Nov 10, 2024 · N477AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHTS ASSOCIATED WITH POWER SUPPLY M2627 ARE INOP. GROUNDED - YES. REMOVED AND REPLACED POWER SUPPLY M2627 AND OPS CHECK GOOD IAW B737 AMM 33-51-06. (S/N 124217)
- [SDR ASAA2024111054259](https://openairdocs.org/sdr/ASAA2024111054259.md): Power Supply · no test · Nov 10, 2024 · N477AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHTS ASSOCIATED WITH POWER SUPPLY M1675 ARE INOP. GROUNDED - YES. REMOVED AND REPLACED POWER SUPPLY M1675 AND OPERATIONAL TEST PERFORMED SUCCESSFULLY IAW B737-900 AMM 33-51-06-960-806. (S/N 123887)
- [SDR ASAA2024081751916](https://openairdocs.org/sdr/ASAA2024081751916.md): Battery Pack · discharged · Aug 17, 2024 · N477AS · Boeing 737990ER · Emergency Lighting
  > DURING T/C 78233008, FOUND R2 DOOR OVERDOOR EXIT SIGN & EXIT INDICATOR SIGN INOP. GROUNDED - YES. REMOVED & REPLACED EMERGENCY LIGHTING BATTERY PACK PER AMM 33-51-06. OPS CHECK NORMAL PER AMM 33-51-00.
- [SDR ASAA2024011047256](https://openairdocs.org/sdr/ASAA2024011047256.md): Power Supply · no test · Jan 10, 2024 · N477AS · Boeing 737990ER · Emergency Lighting
  > WHILE PERFORMING T/C 78233001, AFT GALLEY LH EMERGENCY LIGHTS FAILED CAPACITY CHECK. GROUNDED - YES. REPLACED AFT GALLEY L/H EMERGENCY LIGHT BATTERY PACK PER AMM 33-51-06, OPS NORMAL. GROUND VERIFICATION SUCCESSFUL.
- [SDR ASAA2023091345130](https://openairdocs.org/sdr/ASAA2023091345130.md): Unknown · unknown · Sep 13, 2023 · N477AS · Boeing 737990ER · Windshield/Door Rain/Ice Removal
  > AFTER ENG START FWD + R SIDE WINDOW OVERHEAT LIGHTS ILLUMINATED GROUNDED - YES. RESET PER QRH
- [SDR ASAA2023073144326](https://openairdocs.org/sdr/ASAA2023073144326.md): Power Supply · malfunctioned · Jul 31, 2023 · N477AS · Boeing 737990ER · Emergency Lighting
  > PER TASK CARD 78233008 " EMERGENCY LIGHTS" CHECK FOUND 2 L/H OVER WING EMERGENCY SLIDE LIGHTS INOP. GROUNDED - YES. RELAMPED INOP BULBS PER AMM 33-51-04. NO HELP. REMOVED AND REPLACED BATTERY PACK M1670 PER AMM 33-51-06. OPS CHECK NORMAL. ITEM OKAY FOR SERVICE
- [SDR ASAA2023062943851](https://openairdocs.org/sdr/ASAA2023062943851.md): Unknown · unknown · Jun 29, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > WHILE COMPLETING TASK CARD 78273000 FOUND #2 ENG FAULT CODE 73-11272 THE ALTERNATOR VOLTAGE INPUT TO THE EEC OUT OF RANGE SHORT TIME FAULT. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023061943699](https://openairdocs.org/sdr/ASAA2023061943699.md): Unknown · unknown · Jun 19, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > #2 ENG HAS FAULT 75-10832 T3 SIGNAL IS OUT OF RANGE. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023061533572](https://openairdocs.org/sdr/ASAA2023061533572.md): Unknown · unknown · Jun 13, 2023 · N477AS · Boeing 737990ER · Auto Flight System
  > IN CRUISE FL340, A AUTOPILOT KICKED OFF IN SMOOTH AIR. A AUTOPILOT REENGAGED NORMAL. GROUNDED - YES. ACCOMPLISHED LAND VERIFY TEST. TEST NORMAL. REF B737-900 AMM 22-11-00-700-801. ETOPS GROUND VERIFICATION GOOD.
- [SDR ASAA2023060843495](https://openairdocs.org/sdr/ASAA2023060843495.md): Unknown · unknown · Jun 8, 2023 · N477AS · Boeing 737990ER · HF Communications System
  > SATCOM LOCKOUT GROUNDED - YES. SATCOM LOCKOUT QRH PROCEDURE SUCCESSFULLY PERFORMED.
- [SDR ASAA2023060743494](https://openairdocs.org/sdr/ASAA2023060743494.md): Unknown · unknown · Jun 7, 2023 · N477AS · Boeing 737990ER · HF Communications System
  > SATCOM LOCK-UP. GROUNDED - YES. PERFORMED SATCOM LOCK-UP CB RESET PROCEDURE PER QRH. CPDLC WAS RESTORED AFTER 25 MINUTES.
- [SDR ASAA2023053143451](https://openairdocs.org/sdr/ASAA2023053143451.md): Heat Exchanger · leaking · May 31, 2023 · N477AS · Boeing 737990ER · Engine Fuel and Control
  > #2 ENGINE HAS FUEL DRIPPING FROM IT. GROUNDED - YES. ACCOMPLISHED IDLE LEAK CHECK AND FOUND FUEL DRIPPING FROM MAIN FUEL/OIL HEAT EXCHANGER AT 9 DPM. REMOVED AND REPLACED #2 ENGINE FUEL/OIL HEAT EXCHANGER IAW B737-900 AMM 79-21-02. LEAK CK GOOD.
- [SDR ASAA2023052843415](https://openairdocs.org/sdr/ASAA2023052843415.md): Sensor · failed · May 28, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > WHILE ACCOMPLISHING ASA T/C 78273000 ENG2 BITE TEST RECENT FAULTS LONG TIME MSG NBR: 75-10832 THE T3 SIGNAL IS OUT OF RANGE FLT LEG 0,1 & 3 WAS SEEN. GROUNDED - YES. ACCOMPLISHED B737-900 FIM 75-33 TSK 802, T3 SIGNAL OUT OF RANGE FAULT ISOLATION. PER FIM REMO
- [SDR ASAA2023050843564](https://openairdocs.org/sdr/ASAA2023050843564.md): Sensor · failed · May 8, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > WHILE PERFORMING ASA T.C. 78273000, #2 ENGINE HAS LONG TIME FAULT 75-10832. THE T3 SIGNAL IS OUT OF RANGE ON MULTIPLE LEGS IN HISTORY. GROUNDED - YES. ACCOMPLISHED B737-900 FIM 75-33 TSK 802, T3 SIGNAL OUT OF RANGE FAULT ISOLATION. PER FIM REMOVED AND REPLACED
- [SDR ASAA2023050343116](https://openairdocs.org/sdr/ASAA2023050343116.md): Eec · faulty · May 3, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > WHILE PERFORMING TASK CARD 78273000, #2 ENG HAS LONG TIME FAULT 77-20862, THE BOTTOM LEFT EGT SINGAL (T495S3) IS OUT OF RANGE ON 2 LEGS. GROUNDED - YES. REMOVED #2 ENG EEC REF B737-900 AMM 73-21-60. COMPLETED REMOVAL OF J10 HARNESS REF AMM 73-21-06. INSTALLED
- [SDR ASAA2023050343115](https://openairdocs.org/sdr/ASAA2023050343115.md): Eec · faulty · May 3, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > WHILE PERFORMING ASA TASK CARD 78273000, #2 ENG HAS LONG TIME FAULT 77-20872, THE TOP LEFT EGT SINGAL (T495S4) IS OUT OF RANGE ON 2 LEGS. GROUNDED - YES. REMOVED #2 ENG EEC REF B737-900 AMM 73-21-60. COMPLETED REMOVAL OF J10 HARNESS REF AMM 73-21-06. INSTALLED
- [SDR ASAA2023050343114](https://openairdocs.org/sdr/ASAA2023050343114.md): Eec · faulty · May 3, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > WHILE PERFORMING TASK CARD 78273000 #2 ENG HAS ECONOMIC FAULT 75-20362 THIS HPTACC POSITION SIGNAL IS OUT OF RANGE ON 2 LEGS. GROUNDED - YES. REMOVED #2 ENG EEC REF B737-900 AMM 73-21-60. COMPLETED REMOVAL OF J10 HARNESS REF AMM 73-21-06. INSTALLED J10 HARNESS
- [SDR ASAA2023050343113](https://openairdocs.org/sdr/ASAA2023050343113.md): Eec · faulty · May 3, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > WHILE PERFORMING T.C. #78273000, #2 ENG HAS LONG TIME FAULT 75-20832, THE T3 SIGNAL IS OUT OF RANGE, ON 2 LEGS. GROUNDED - YES. REMOVED #2 ENG EEC REF B737-900 AMM 73-21-60. COMPLETED REMOVAL OF J10 HARNESS REF AMM 73-21-06. INSTALLED J10 HARNESS REF AMM 73-21
- [SDR ASAA2023050343112](https://openairdocs.org/sdr/ASAA2023050343112.md): Eec · faulty · May 3, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > WHILE PERFORMING T.C. #78273000, #2 ENG HAS LONG TIME FAULT 75-20822, THE T25 SIGNAL IS OUT OF RANGE, ON 2 LEGS. GROUNDED - YES. REMOVED #2 ENG EEC REF B737-900 AMM 73-21-60. COMPLETED REMOVAL OF J10 HARNESS REF AMM 73-21-06. INSTALLED J10 HARNESS REF AMM 73-2
- [SDR ASAA2023050343111](https://openairdocs.org/sdr/ASAA2023050343111.md): Eec · faulty · May 3, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > WHILE PERFORMING T.C. 78273000, #2 ENG HAS LONG TIME FAULT 75-20592 THE TBV POSITION SIGNAL IS OUT OF RANGE, ON 2 LEGS. GROUNDED - YES. REMOVED #2 ENG EEC REF B737-900 AMM 73-21-60. COMPLETED REMOVAL OF J10 HARNESS REF AMM 73-21-06. INSTALLED J10 HARNESS REF A
- [SDR ASAA2023050343110](https://openairdocs.org/sdr/ASAA2023050343110.md): Eec · faulty · May 3, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > WHILE PERFORMING T.C. # 78273000, #2 ENG HAS LONG TIME FAULT 75-20442, THE VBV POSITION SIGNAL IS OUT OF RANGE, ON 2 LEGS. GROUNDED - YES. REMOVED #2 ENG EEC REF B737-900 AMM 73-21-60. COMPLETED REMOVAL OF J10 HARNESS REF AMM 73-21-06. INSTALLED J10 HARNESS RE
- [SDR ASAA2023050343109](https://openairdocs.org/sdr/ASAA2023050343109.md): Eec · faulty · May 3, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > WHILE PERFORMING T.C. # 78273000, #2 ENG HAS LONG TIME FAULT 75-10832, THE T3 SIGNAL IS OUT OF RANGE, ON MULTIPLE LEGS IN HISTORY. GROUNDED - YES. REMOVED #2 ENG EEC REF B737-900 AMM 73-21-60. COMPLETED REMOVAL OF J10 HARNESS REF AMM 73-21-06. INSTALLED J10 HA
- [SDR ASAA2023050343108](https://openairdocs.org/sdr/ASAA2023050343108.md): Eec · faulty · May 3, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > WHILE PERFORMING T.C. #782730000, #2 ENG HAS ECONOMIC FAULT 75-20542, THE LPTACC POSITION SIGNAL IS OUT RANGE, ON 2 LEGS. GROUNDED - YES. REMOVED #2 ENG EEC REF B737-900 AMM 73-21-60. COMPLETED REMOVAL OF J10 HARNESS REF AMM 73-21-06. INSTALLED J10 HARNESS REF
- [SDR ASAA2023050343107](https://openairdocs.org/sdr/ASAA2023050343107.md): Eec · faulty · May 3, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > WHILE PERFORMING ASA T.C. #78273000, #2 ENG HAS FAULT 75-20392, THE VSV POSITION SIGNAL IS OUT OF RANGE, ON 2 LEGS IN HISTORY. LONG TIME. GROUNDED - YES. REMOVED #2 ENG EEC REF B737-900 AMM 73-21-60. COMPLETED REMOVAL OF J10 HARNESS REF AMM 73-21-06. INSTALLED
- [SDR ASAA2023050243106](https://openairdocs.org/sdr/ASAA2023050243106.md): Unknown · unknown · May 2, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > ON TAXI IN #2 EEC ENGINE CONTROL LIGHT ILLUMINATED. GROUNDED - YES. EEC BITE LOGGED FAULT 75-30832 T3 SIGNAL OUT OF RANGE GVI ENG 2 EEC FOUND T3 CONNECTOR AND J10 LOOSE. REMOVED 8 GV1 CONNECTOR- NO DEFECTS NOTED RECONNECTED & TEST OD EEC OKAY REF B737-900 FIM
- [SDR ASAA2023050143089](https://openairdocs.org/sdr/ASAA2023050143089.md): Fuel Heater · leaking · May 1, 2023 · N477AS · Boeing 737990ER · Engine Fuel Distribution
  > DURING ACTUATORS TEST ON ENGINE 2 FOUND SERVO FUEL HEATER LEAKING. GROUNDED - YES. R/R SERVO FUEL HEATER PER B737-900 AMM 73-11-07-400-801-F00.
- [SDR ASAA2023050143066](https://openairdocs.org/sdr/ASAA2023050143066.md): Sensor · out of range · May 1, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > "ENGINE CONTROL" LIGHT ON OVERHEAD ILLUMINATED ON ENGINE #2 AFTER LANDING. GROUNDED - YES. REMOVED T3 SENSOR REF B737-900 AMM 73-21-07. INSTALLED ENGINE 2 T3 SENSOR PER AMM 73-21-07-400-801-F00.
- [SDR ASAA2023042042960](https://openairdocs.org/sdr/ASAA2023042042960.md): Unknown · unknown · Apr 20, 2023 · N477AS · Boeing 737990ER · Autopilot System
  > AUTO PILOT "A" DISCONNECTED IN CRUISE FLT, RE-ENGAGED, AFTER 5 MINUTES AUTOPILOT DISCONNECTED, SWITCHED TO AUTO "B" WORKS FINE. GROUNDED - YES. REF B737-900 FIM 22-11 TASK 854 PERFORMED LLM AUTOLAND TEST, ALL TEST PASSED NO FAULTS DETECTED AT THIS TIME. CAT II
- [SDR ASAA2023041342877](https://openairdocs.org/sdr/ASAA2023041342877.md): Motor · faulted · Apr 13, 2023 · N477AS · Boeing 737990ER · Autopilot System
  > AUTOPILOT A DISCONNECTED IN CRUISE FLIGHT. GROUNDED - YES. INSPECTED AND FOUND FAULT MESSAGE 22-11186 SEVERAL TIMES IN AUTO PILOT DISCONNECT AND DFCS LOGGED FAULTS. PER FIM 22-11 TASK 854. REPLACED STABILIZER TRIM MOTOR M1659. RMVD AND INSTALLED NEW M1669. RE
- [SDR ASAA2023041242836](https://openairdocs.org/sdr/ASAA2023041242836.md): Unknown · unknown · Apr 12, 2023 · N477AS · Boeing 737990ER · Autopilot System
  > AT FL360 ENGAGGED "A" AUTOPILOT. AFTER 5 MINUTES, AUTOPILOT DISENGAGED. RE-ENGAGED "A" AUTOPILOT, AND AFTER 5 MINUTES, AUTOPILOT DISENGAGED AGAIN. ENGAGED "B" AUTOPILOT, "B" WORKS FINE. GROUNDED - YES. ACCOMPLISHED DFCS BITE B737-900 FIM 22-11 TASK 801. FOUND
- [SDR ASAA2023022442077](https://openairdocs.org/sdr/ASAA2023022442077.md): Lens · missing · Feb 24, 2023 · N477AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY AISLE LIGHT LENS MISSING (INOP) ABOVE ROW 30ABC. GROUNDED - YES. REPLACED AISLE EMERGENCY LIGHT LENS, REF B737-900 AMM 33-51-03.
- [SDR ASAA2023021342420](https://openairdocs.org/sdr/ASAA2023021342420.md): Sensor · out of range · Feb 13, 2023 · N477AS · Boeing 737990ER · Fuel Controlling System
  > WHILE ACCOMPLISHING ASA T/C 78273000 FOUND LONG TIME FAULT ON #2 ENGINE. "T3 SIGNAL IS OUT OF RANGE" MESSAGE # 75-10832. GROUNDED - YES. REPLACED THE T3 SENSOR REF B737-900 FIM 75-33 TSK 802 AND B737-900 AMM 73-21-07.
- [SDR ASAA2022122741256](https://openairdocs.org/sdr/ASAA2022122741256.md): Satcom · locked · Dec 27, 2022 · N477AS · Boeing 737990ER · Communications System
  > SATCOM LOCKED UP. GROUNDED - YES. CIRCUIT BREAKER CYCLED TO CLEAR LOCKUP.
- [SDR ASAA2022122641263](https://openairdocs.org/sdr/ASAA2022122641263.md): Fmc · malfunctioned · Dec 26, 2022 · N477AS · Boeing 737990ER · Flight Management Computing Hardware System
  > AT CRUISE RECEIVED 'VTK" AND NO FMC DATA ON CA SIDE. AFTER A FEW SECONDS "VTK" EXTINGUISHED AND FMC DATA CAME BACK AND WE RESUMED NORMAL OPERATIONS. GROUNDED - YES. PERFORMED FMC SYSTEM BITE PROCEDURE IAW B737-900 FIM 34-61 TASK 801, NO DEFECTS NOTED CAPTAIN A
- [SDR ASAA2022122641225](https://openairdocs.org/sdr/ASAA2022122641225.md): Warning Light · false indication · Dec 26, 2022 · N477AS · Boeing 737990ER · Cabin Temperature Control System
  > ON RECALL MASTER CAUTION AND "AIR CON " LIGHT ILL ZONE TEMP LIGHT ABOVE CONTROLLER CABIN ILLUMINATED LIGHTS EXTINGUISHED OM MASTER CAUTION RESET. GROUNDED - YES. PERFORMED PZTC BITE IAW AMM 21-61-00, ONE HIT FOR FLT DECK TRIM VALVE AT CONTROLLER NR 2 M1443. P
- [SDR ASAA2022121341118](https://openairdocs.org/sdr/ASAA2022121341118.md): Lamp · inoperative · Dec 13, 2022 · N477AS · Boeing 737990ER · Emergency Lighting
  > RH EMERGENCY LIGHT AFT OF WING INOPERATIVE. GROUNDED - YES. REPLACED THE RT EMERGENCY LIGHT LAMP IAW AMM 33-51-04. OPS CHECKED GOOD.
- [SDR ASAA2022111540779](https://openairdocs.org/sdr/ASAA2022111540779.md): Warning Message · false activation · Nov 15, 2022 · N477AS · Boeing 737990ER · Central Warning
  > SAT PROMPT NOT DISPLAYED ON MCDU PERFORMED QRH SAT LOCK UP PROCEDURE AND SAT RESTORED. GROUNDED - YES. CONFIRMED RESET SATCOM OP OK REF B737-900 AMM 23-15-00.
- [SDR ASAA2022102940562](https://openairdocs.org/sdr/ASAA2022102940562.md): Pump · failed · Oct 29, 2022 · N477AS · Boeing 737990ER · Fuel Boost Pump
  > RT CTR FUEL PUMP LOW PRESSURE LT ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED OF RT CTR FUEL PUMP MOTOR IMPELLER.
- [SDR ASAA2022102940545](https://openairdocs.org/sdr/ASAA2022102940545.md): Pressure Switch · faulted · Oct 29, 2022 · N477AS · Boeing 737990ER · Aircraft Fuel Distribution System
  > IN LEVEL FLIGHT W/1.6 CTR TANK R CTR FUEL PUMP LOW PRESSURE LIGHT REMAINS ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED RH CENTER FUEL PUMP PRESSURE SWITCH REF B737-900 AMM 28-42-11.

Next page: https://openairdocs.org/aircraft/N477AS/reports.md?page=2

## 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 = 'N477AS' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N477AS/reports

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