# Service difficulty reports: N493AS

A list on [N493AS](https://openairdocs.org/aircraft/N493AS.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 5 · 213 reports

- [SDR ASAA2025111962623](https://openairdocs.org/sdr/ASAA2025111962623.md): Transition Panel · corroded · Nov 19, 2025 · N493AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > RIGHT TRANSITION SIDEPLATE IS CORRODED BETWEEN BS 727G+12 TO 767. GROUNDED - YES. REPAIRED TRANSITION SIDEPLATE BS 727G+12 TO 767 IAW SRM 53-00-53-2R-5. W 1, O.063, R.000, L 3, D.063.
- [SDR ASAA2025111962622](https://openairdocs.org/sdr/ASAA2025111962622.md): Transition Panel · corroded · Nov 19, 2025 · N493AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > LEFT TRANSITION SIDEPLATE IS CORRODED BETWEEN STA 727G+12 TO 747+12. GROUNDED - YES. REPAIRED LT TRANSITION SIDEPLATE STA 727F+12 TO 747+12 IAW B737-900 SRM 53-00-53-2R-5. W 1.3, O.040, R.015, L 15, D.025.
- [SDR ASAA2025071259470](https://openairdocs.org/sdr/ASAA2025071259470.md): Battery · inoperative · Jul 12, 2025 · N493AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHT BATTERY M1675 INOP. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY LIGHT BATTERY M1675 IAW B737 AMM 33-51-06-960-806. (S/N 82958)
- [SDR ASAA2025071259469](https://openairdocs.org/sdr/ASAA2025071259469.md): Power Supply · inoperative · Jul 12, 2025 · N493AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHT BATTERY M1676 INOP. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY LIGHT BATTERY M1676 IAW B737 AMM 33-51-06-960-806. (S/N 129042)
- [SDR ASAA2025030656478](https://openairdocs.org/sdr/ASAA2025030656478.md): Door · binding · Mar 6, 2025 · N493AS · Boeing 737990ER · Passenger/Crew Doors
  > CSA REPORTS L1 DOOR DIFFICULT TO OPEN + CLOSE. GROUNDED - YES. OPS CHECK L1 DOOR OPEN + CLOSE. DOOR OPERATION GOOD AT THIS TIME. REF AMM 52-11-00.
- [SDR ASAA2025030656470](https://openairdocs.org/sdr/ASAA2025030656470.md): Light · detached · Mar 6, 2025 · N493AS · Boeing 737990ER · Emergency Lighting
  > FA'S REPORT ROW 13 FLOOR LIGHTING BUBBLED @ ROW 13. GROUNDED - YES. REMOVED + REINSTALLED A/C RIGHT FLOOR PHOTOLUMINESCENT STRIP BETWEEN ROWS 12DEF AND 15DEF. FLOOR PHOTOLUMINESCENT STRIP SECURE AT THIS TIME WITH NO OTHER DEFECTS NOTED REF AMM 33-51-15. SEAMC
- [SDR ASAA2024111453898](https://openairdocs.org/sdr/ASAA2024111453898.md): Light · detached · Nov 14, 2024 · N493AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHT ABOVE 27ABC POPPED OUT. GROUNDED - YES. REINSTALLED EMERGENCY AISLE LIGHT ABOVE SEAT 27ABC, OPS CHECK NORMAL PER AMM 33-51-03.
- [SDR ASAA2024082652105](https://openairdocs.org/sdr/ASAA2024082652105.md): Lens · missing · Aug 26, 2024 · N493AS · Boeing 737990ER · Emergency Lighting
  > FA FOUND EMERGENCY COVER AIRCRAFT RIGHT ON THE FLOOR. GROUNDED - YES. (RESOLVED ON W/O: 2012360 TASKCARD: N/R-00001) REPLACED EMERGENCY EXIT LIGHT LENS AT SEAT ROW 17F PER AMM 33-51-01 OPS CHECKED GOOD. A/C RELEASED FROM PLT DEFERRAL AND EA 900ER-33E4-27478.
- [SDR ASAA2024050749490](https://openairdocs.org/sdr/ASAA2024050749490.md): Lens · missing · May 7, 2024 · N493AS · Boeing 737990ER · Emergency Lighting
  > THE LENS FOR THE EMERGENCY AISLE LIGHT AT ROW 4 IS MISSING. GROUNDED - YES. INSTALLED EMERGENCY AISLE LIGHT LENS COVER AT ROW 4 REF AMM 33-51-03.
- [SDR ASAA2024041649131](https://openairdocs.org/sdr/ASAA2024041649131.md): Rib · damaged · Apr 16, 2024 · N493AS · Boeing 737990ER · Horizontal Stabilizer, Spar/Rib
  > TRAILING EDGE OF LOWER FLANGE ON HORIZONTAL STAB O/B CLOSURE RIB ON R/H SIDE HAS EVIDENCE OF HEAT DAMAGE. (LAST NUTPLATE AREA). GROUNDED - YES. ACCOMP HFEL PEV NDT 51-00-00 PROCEDURE 23 NO CRACKS NOTED. ACCOMP. CONDUCTIVITY CHECK PER BNDT PART LO. 51-00-00 PRO
- [SDR ASAA2024012547527](https://openairdocs.org/sdr/ASAA2024012547527.md): Power Supply · inoperative · Jan 25, 2024 · N493AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHT POWER SUPPLY M1694 AND M1670 INOP. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY LIGHT POWER SUPPLIES M1694 AND M1670 OPS CHECK GOOD REF AMM 33-51-06 2 CB'S PULLED, COLLARED AND RESET.
- [SDR ASAA2024012547525](https://openairdocs.org/sdr/ASAA2024012547525.md): Lamp · inoperative · Jan 25, 2024 · N493AS · Boeing 737990ER · Emergency Lighting
  > R2 DOOR EXTERIOR EMERGENCY LIGHT INOP. GROUNDED - YES. REPLAMPED R2 DOOR EXTERIOR EMERGENCY LIGHT REF AMM 33-51-04 OPS GOOD.
- [SDR ASAA2023110145971](https://openairdocs.org/sdr/ASAA2023110145971.md): Blade · worn · Nov 1, 2023 · N493AS · Boeing 737990ER · Turbine Engine Air Inlet Section
  > FOUND EXCESSIVE WEAR / DAMAGE ON MULTIPLE FAN BLADE PLATFORMS ON #1 ENGINE. GROUNDED - YES. REF W/O 1969863REF T/C SBCFM56-7B-72-1033-1. REMOVED AND REPLACED ALL FRAN BLADE PLATFORMS DURING FAN LUBE T/C ON #1 ENGINE. PERFORMED ENGINE POWER RUN TEST #7 REF AMM
- [SDR ASAA2023103145942](https://openairdocs.org/sdr/ASAA2023103145942.md): Modulating Valve · faulty · Oct 31, 2023 · N493AS · Boeing 737990ER · Cabin Cooling System
  > RIGHT PACK LIGHT ILLUMINATED. EXTINGUISHES WHEN CLEARING MASTER CAUTION. GROUNDED - YES. (RESOLVED ON W/O: 1969863 TASKCARD: N/R-00006) PERFORMED PACK TEMPCONTROL BITEREF FIM 21-62 TASK 801FOUND P2TC THIS PACK TCV FAULT. TROUBLESHOT REF FIM 21-62 TASK 831REPL
- [SDR ASAA2023102345816](https://openairdocs.org/sdr/ASAA2023102345816.md): Unknown · unknown · Oct 23, 2023 · N493AS · Boeing 737990ER · Engine Cooling System
  > FOUND 4 ECONOMIC FAULTS ON #2 ENG HPTACC SIGNALS RECORDED FAULTS: 75-10462, 75-20412, 75-10412, 75-10362. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023101645679](https://openairdocs.org/sdr/ASAA2023101645679.md): Unknown · unknown · Oct 16, 2023 · N493AS · Boeing 737990ER · Cabin Cooling System
  > RIGHT "RAM DOOR FULL OPEN" LIGHT WAS ILLUMINATED THE ENTIRE FLIGHT. PACKS, A/C, PRESSURIZATION ALL NORMAL. GROUNDED - YES. PERFORMED B737-900 FIM 21-51 TASK 803. NO FAULTS FOUND, OPS CHECK NORMAL. DETERMINED TO BE INTERMITTENT FAULT. AIRPLANE RETURNED TO NORMA
- [SDR ASAA2023092345250](https://openairdocs.org/sdr/ASAA2023092345250.md): Unknown · unknown · Sep 23, 2023 · N493AS · Boeing 737990ER · Fuel Controlling System
  > DURING TC 78273000 FOUND ECONOMIC FAULT 75-10242 AND 75-20412 HPTACC SIGNAL DISAGREE. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023092345246](https://openairdocs.org/sdr/ASAA2023092345246.md): Unknown · unknown · Sep 23, 2023 · N493AS · Boeing 737990ER · Fuel Controlling System
  > DURING TC 7827300 FOUND ECONOMIC FAULT 75-10462 AND 75-20462 HPTACC DEMAND AND POSITION SIGNALS DISAGREE. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023092345245](https://openairdocs.org/sdr/ASAA2023092345245.md): Unknown · unknown · Sep 23, 2023 · N493AS · Boeing 737990ER · Engine Bleed Air System
  > DURING TC 78273000 FOUND ECONOMIC FAULT 75-10362 HPTACC POSITION OUT OF RANGE. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023091945222](https://openairdocs.org/sdr/ASAA2023091945222.md): Unknown · unknown · Sep 19, 2023 · N493AS · Boeing 737990ER · Engine Fuel and Control
  > DURING PERFORMING T/C 78273000 FOUND ENG #1 MSG BR: 73-10191 INTERVAL EEC FAULT, LONG TIME. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023082344750](https://openairdocs.org/sdr/ASAA2023082344750.md): Unknown · unknown · Aug 23, 2023 · N493AS · Boeing 737990ER · Cabin Cooling System
  > LT PACK LIGHT ILLUMINATES ON RECALL. GROUNDED - YES. PERFORMED #1 ZONE PACK TEMP CONTROLLER BITE REF AMM 21-61-00. NO FAULTS FOUND, APPEARS TO BE AN INTERMITTENT FAULT. NO HISTORY FOR 30 DAYS. THIS CLEARS MEL 21-32B. C/N 2303349 REMOVED. SEAMC PETER NOTIFIED.
- [SDR ASAA2023082344718](https://openairdocs.org/sdr/ASAA2023082344718.md): Control Valve · faulted · Aug 23, 2023 · N493AS · Boeing 737990ER · Cabin Cooling System
  > TECH SERVICES REQUEST REPLACEMENT OF THE #1(LEFT)V18 FLOW CONTROL VALVE DUE TO REPORT LEFT PACK CYCLING FROM HIGH TO LOW FLOW. GROUNDED - YES. REMOVED AND REPLACED LEFT FLOW CONTROL AND SHUTOFF VALVE REF B737-900 AMM 21-51-01 OPS CHECK NORMAL.
- [SDR ASAA2023081644640](https://openairdocs.org/sdr/ASAA2023081644640.md): Unknown · unknown · Aug 16, 2023 · N493AS · Boeing 737990ER · Engine Bleed Air System
  > WHILE ACCOMPLISHING T/C 78273000 FAULT CODE APPEARED ON #2 ENGINE 75-20462 THE HPTACC DEMAND AND POSITION SIGNALS DISAGREE, ECONOMIC FAULT. MUST BE CORRECTED IN 500 HR PLT. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023081644639](https://openairdocs.org/sdr/ASAA2023081644639.md): Unknown · unknown · Aug 16, 2023 · N493AS · Boeing 737990ER · Engine Cooling System
  > WHILE ACCOMPLISHING T/C78273000 FAULT CODE 75-10462 APPEARED ON #2 ENGINE. THE HPTACC DEMAND AND POSITION SIGNALS DISAGREE, ECONOMIC FAULT MUST BE CORRECTED IN 500 HRS. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023081644638](https://openairdocs.org/sdr/ASAA2023081644638.md): Unknown · unknown · Aug 16, 2023 · N493AS · Boeing 737990ER · Engine Bleed Air System
  > WHILE ACCOMPLISHING T/C78273000 FAULT CODE 75-10362 APPEARED ON #2 ENGINE, THE HPTACC POSITION SIGNAL IS OUT OF RANGE, ECONOMIC FAULT. MUST BE CORRECTED IN 500 HOURS. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023081644637](https://openairdocs.org/sdr/ASAA2023081644637.md): Unknown · unknown · Aug 16, 2023 · N493AS · Boeing 737990ER · Engine Bleed Air System
  > WHILE ACCOMPLISHING T/C78273000 FAULT CODE 75-30412 APPEARED ON #2 ENGINE, THE HPTACC POSITION SIGNAL DISAGREE, ECONOMIC FAULT. MUST BE CORRECTED IN 500 HOURS. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023080244382](https://openairdocs.org/sdr/ASAA2023080244382.md): Power Supply · failed · Aug 2, 2023 · N493AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHT SYSTEM BATTERY PACK M2627 FAILED OPERATIONAL CHECK. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY POWER SUPPLY M2627 IAW B737 AMM 33-51-06. OP CHECKS GOOD.
- [SDR ASAA2023071744076](https://openairdocs.org/sdr/ASAA2023071744076.md): Unknown · unknown · Jul 17, 2023 · N493AS · Boeing 737990ER · Flight Management Computing Hardware System
  > FMC DISAGREE DURING PUSHBACK. GROUNDED - YES. MESSAGE CLEARED WITHOUT USE OF THE QRH.
- [SDR ASAA2023062843815](https://openairdocs.org/sdr/ASAA2023062843815.md): Unknown · unknown · Jun 28, 2023 · N493AS · Boeing 737990ER · Engine Bleed Air System
  > #2 ENG FAULT CODE 75-10462 THE HPTACC DEMAND AND POSITION SIGNALS DISAGREE ECO FAULT. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023062543754](https://openairdocs.org/sdr/ASAA2023062543754.md): Actuator · faulty · Jun 25, 2023 · N493AS · Boeing 737990ER · Cabin Cooling System
  > RIGHT RAM DOOR (BLUE) LIGHT ILLUMINATED IN CRZ. GROUNDED - YES. REVERSED MEL CONFIG FOR MEL 21-5D. AFT RAM AIR LOUVERS AND INLET ACTUATOR BACK TO NORMAL CONFIG. 5 CB PULLED, COLLARED, AND RESET. SRADA LINK AND BOLT, NUT, AND COTTER PIN STOWED IN MAIN E/E FLY A
- [SDR ASAA2023062243695](https://openairdocs.org/sdr/ASAA2023062243695.md): Unknown · unknown · Jun 22, 2023 · N493AS · Boeing 737990ER · Compressor Bleed Control
  > # 2 ENG FAULT CODE 75-20462, THE HPTACC DEMAND AND POSITION SIGNALS DISAGREE. ECO FAULT. # 2 ENG FAULT CODE 75-30412. THE HPTACC POSITION SIGNALS DISAGREE. ECO FAULT. # 2 ENG FAULT CODE 75-10362. THE HPTACC POSITON SIGNAL IS OUT OF RANGE. ECO FAULT. PERFORMED
- [SDR ASAA2023061543573](https://openairdocs.org/sdr/ASAA2023061543573.md): Unknown · unknown · Jun 14, 2023 · N493AS · Boeing 737990ER · Communications System
  > SATCOM PROMPT WAS MISSING ON THE MCDU MENU GROUNDED - YES. QRH RESET PROCEDURE WAS SUCCESSFUL.
- [SDR ASAA2023052443343](https://openairdocs.org/sdr/ASAA2023052443343.md): Spinner · worn · May 24, 2023 · N493AS · Boeing 737990ER · Turbine Engine Air Inlet Section
  > ENGINE #2 SPINNER CONE WORN. GROUNDED - YES. REPLACED ENGINE SPINNER REF ASA TASK CARD 78472010.
- [SDR ASAA2023042943047](https://openairdocs.org/sdr/ASAA2023042943047.md): Unknown · unknown · Apr 29, 2023 · N493AS · Boeing 737990ER · HF Communications System
  > INFLIGHT SATCOM LOCK-UP. GROUNDED - YES. QRH PROCEDURE PERFORMED. SATCOM RESTORED.
- [SDR ASAA2023041742911](https://openairdocs.org/sdr/ASAA2023041742911.md): Unknown · unknown · Apr 17, 2023 · N493AS · Boeing 737990ER · HF Communications System
  > SATCOM LOCKUP. GROUNDED - YES. QRH COMPLETED SUCCESSFULLY.
- [SDR ASAA2023022442083](https://openairdocs.org/sdr/ASAA2023022442083.md): Unknown · unknown · Feb 24, 2023 · N493AS · Boeing 737990ER · Independent Position Determining System
  > PREDICTIVE WINDSHEAR ALERT FAIL (PWS FAIL) DURING TAKE OFF ROLL. RADAR WORKED GOOD IN CRUISE. GROUNDED - YES. ACCOMP B737-900 FIM 34-43 TASKS 815 & 801, SYS OPS CKS NML PER SAME. GROUND VERIFICATION SUCCESSFUL.
- [SDR ASAA2023011041957](https://openairdocs.org/sdr/ASAA2023011041957.md): Lever · faulty · Jan 10, 2023 · N493AS · Boeing 737990ER · Engine Controls
  > ENGINE 1 LONG TIME FAULT MSG # 73-10191 INTERNAL EEC FAULT. GROUNDED - YES. REPLACED #1 ENGINE START LEVER REF B737-900 AMM 76-11-02.
- [SDR ASAA2023010951435](https://openairdocs.org/sdr/ASAA2023010951435.md): Warning Light · false activation · Jan 5, 2023 · N493AS · Boeing 737990ER · Cabin Temperature Control System
  > CONT CABIN ZONE TEMP LIGHT ILLUMINATED DURING MASTER CAUTION RECALL. GROUNDED - YES. REF B737-900 FIM 21-62 TASK 848 NO FAULTS DETECTED AT THIS TIME.
- [SDR ASAA2023010541442](https://openairdocs.org/sdr/ASAA2023010541442.md): Anti-Ice Valve · stuck · Jan 5, 2023 · N493AS · Boeing 737990ER · Engine Anti-Icing System
  > ON DESCENT IN TO SEATTLE, THE LEFT COWL VALVE GOT STUCK CLOSED. WHEN WE TRIED LATER, THE VALVE WORKED AS IT IS SUPPOSED TO. GROUNDED - YES. REMOVED AND REPLACED #1 INLET COWL TAI VALVE ASSY REF B737-900 AMM 30-21-11.
- [SDR ASAA2022123141330](https://openairdocs.org/sdr/ASAA2022123141330.md): Satcom · locked · Dec 31, 2022 · N493AS · Boeing 737990ER · Communications System
  > SATCOM LOCK UP GROUNDED - YES. SATCOM DISPLAY RE-ESTABLISHED VIA QRH.
- [SDR ASAA2022121841200](https://openairdocs.org/sdr/ASAA2022121841200.md): Modulating Valve · failed · Dec 18, 2022 · N493AS · Boeing 737990ER · Cabin Cooling System
  > LEFT PACK LIGHT COMES ON WITH RECALL. IT EXTINGUISHED WITH MASTER CAUTION RESET. GROUNDED - YES. CONFIRMED FAULT, NR 1 PACK/ZONE TEMP CONTROLLER SHOWS HARD FAIL TCV 1 (V139). REMOVED & REPLACED IAW AMM 21-51-10.
- [SDR ASAA2022121941150](https://openairdocs.org/sdr/ASAA2022121941150.md): Modulating Valve · failed · Dec 14, 2022 · N493AS · Boeing 737990ER · Cabin Temperature Control System
  > CONT CAB ZONE TEMP ON RECALL. GOES OUT WITH RESET. GROUNDED - YES. CONFIRMED FAULT, NR 2 PACK/ZONE TEMP CONTROLLER SHOWS HARD FAIL "FLIGHT DECK" TCV (V143). REMOVED & REPLACED SAME REF B737-900 AMM 21-61-21. ORIG SUBMISSION DATE: 12/19/2022
- [SDR ASAA2022121041092](https://openairdocs.org/sdr/ASAA2022121041092.md): Anti-Ice Valve · inoperative · Dec 10, 2022 · N493AS · Boeing 737990ER · Air Intake Anti/De-Ice System
  > #1 ENGINE ANTI-ICE VALVE DOES NOT ACTUATE WITH THRUST AT IDLE. THRUST NEEDS TO BE INCREASED TO GET VALVE TO MOVE. GROUNDED - YES. PERFORMED ENG#1 IDLE RUN PER B737-900 AMM 71-00-00/501 NO FAULT PERFORMED B737-900 FIM 30-21 TASK 802 OPS CHECK OK.
- [SDR ASAA2022120141002](https://openairdocs.org/sdr/ASAA2022120141002.md): Warning Message · false activation · Dec 1, 2022 · N493AS · Boeing 737990ER · Cabin Temperature Control System
  > ZONE TEMP CONT CAB. RESET WITH RECALL. GROUNDED - YES. ON FIRST BITE ATTEMPT, "FLT DECK TRIM VALVE" LIGHT ILLUMINATED ON "BIT" STEP AND "PREV FLT" STEP, BUT EXTINGUISHED ON "VERIFY" STEP. 2ND ATTEMPT, "SRADA EXIT" LIGHT ILLUMINATED ON "VERIFY" STEP. CYCLED POW
- [SDR ASAA2022112940977](https://openairdocs.org/sdr/ASAA2022112940977.md): Access Door · leaking · Nov 29, 2022 · N493AS · Boeing 737990ER · Fuel Storage
  > RH WING CENTER TANK PANEL 631BB ACCESS DOOR (6), HAS A SMALL FUEL LEAK. GROUNDED - YES. RETORQUED RH CENTER FUEL TANK PANEL LWR 631BB ACCESS DOOR (6) IN REF TO B737-900 AMM 28-11-31. NO LEAKS NOTED. OK FOR SERVICE.
- [SDR ASAA2022112840978](https://openairdocs.org/sdr/ASAA2022112840978.md): Gasket · leaking · Nov 28, 2022 · N493AS · Boeing 737990ER · Wing Main, Frame Structure
  > RH WING FUEL PANEL 632KB SMALL FUEL LEAK. GROUNDED - YES. REMOVED PANEL #632KB ON RH WING. REPLACED GASKET & REINSTALLED RH WING LOWER FUEL 632KB IN REF TO B737-900 AMM 28-11-11-400-801, TRANSFER FUEL BACK, SOAKED FOR A HOUR, NO LEAKS NOTED. OK FOR SERVICE.
- [SDR ASAA2022112040857](https://openairdocs.org/sdr/ASAA2022112040857.md): Battery Pack · discharged · Nov 20, 2022 · N493AS · Boeing 737990ER · Emergency Lighting
  > DURING ACCOMPLISHMENT OF ASA T/C 78233008 OPS CHECK OF EMERGENCY LIGHTS AISLE EMERGENCY LIGHT AT SEAT ROW 27ABC IS INOP. GROUNDED - YES. VERIFIED- INSTALLED NEW EMERGENCY LT ASSY - NO HELP. REF B737-900 MM 33-51-06, REMOVED/ & REPLACED M2626 POWER SUPPLY/BATT
- [SDR ASAA2022110640657](https://openairdocs.org/sdr/ASAA2022110640657.md): Outflow Valve · leaking · Nov 6, 2022 · N493AS · Boeing 737990ER · Pressure Regulator/Outflow Valve
  > ASA TECH SERVICE REQUEST. FOLLOW UP TO CONTINUING REPORTS OF SQUEALING NOISE IN AFT GALLEY BY R-2 DOOR. GROUNDED - YES. REMOVED AND REPLACED OUTFLOW VALVE WITH NEWER STYLE REF B737-900 AMM 21-31-03.
- [SDR ASAA2022110540650](https://openairdocs.org/sdr/ASAA2022110540650.md): Warning Light · false activation · Nov 5, 2022 · N493AS · Boeing 737990ER · Engine Anti-Icing System
  > WITH ENGINE ANTI-ICE ON L/H ENG ANTI-ICE COWL VALVE OPEN LIGHT REMAINS BRIGHT BLUE AND L/H TAI AMBER LIGHT ILLUMINATES. GROUNDED - YES. PERFORMED B737-900 FIM 30-21 TASK 804. LEFT ENGINE COWL LIGHTS EXTINGUISHED. PRESSURIZED PNEUMATIC SYSTEM USING APU BLEED AI
- [SDR ASAA2022110440627](https://openairdocs.org/sdr/ASAA2022110440627.md): Outflow Valve · leaking · Nov 4, 2022 · N493AS · Boeing 737990ER · Pressure Regulator/Outflow Valve
  > FLIGHT ATTENDANTS REPORT LOUD SQUEALING SOUND ENROUTE AT ALTITUDE. PRESSURIZATION NORMAL. SQUEAL DIMINISHED @ 4 PSI DIFFERENTIAL. GROUNDED - YES. REMOVED AND REPLACED OUTFLOW VALVE WITH NEWER STYLE REF B737-900 AMM 21-31-03.

Next page: https://openairdocs.org/aircraft/N493AS/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 = 'N493AS' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N493AS/reports

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