# Service difficulty reports: N472AS

A list on [N472AS](https://openairdocs.org/aircraft/N472AS.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 · 211 reports

- [SDR ASAA2026040465321](https://openairdocs.org/sdr/ASAA2026040465321.md): Battery Pack · inoperative · Apr 4, 2026 · N472AS · Boeing 737990ER · Emergency Lighting
  > INTERIOR FWD LEFT BANK OF EMERGENCY EXIT LIGHTS INCLUDING EXTERIOR FWD LEFT OVERWING EXIT INOP. GROUNDED - YES. TRANSFERED TO MIG-5 S/N: OK464659 REMOVED AND REPLACED BATTERY PACK OPS CK GOOD IAW B737-900 AMM 33-51-06-960-805.
- [SDR ASAA2026040465308](https://openairdocs.org/sdr/ASAA2026040465308.md): Test Switch · dirty · Apr 4, 2026 · N472AS · Boeing 737990ER · Fire Detection
  > WHEEL WELL FIRE TEST FAILED SWITCH IN WHELL WELL DOES NOT EXTINGUISH LIGHT OR BELL. GROUNDED - YES. TRANSFERED TO MIG-5 S/N OK464651 CLEANED WHEEL WELL FIRE TEST SWITCH OPS CHECK GOOD IAW B737-900 AMM 26-15-00-710-801 AND 20-60-02-100-801.
- [SDR ASAA2025100661436](https://openairdocs.org/sdr/ASAA2025100661436.md): Sign · unsecure · Oct 6, 2025 · N472AS · Boeing 737990ER · Emergency Lighting
  > R2 DOOR EXIT SIGN. GROUNDED - YES. RE-INSTALLED R2 EXIT SIGN -- SECURED IN REF. AMM 25-00-00 & AMM 25-64-00.
- [SDR ASAA2024110653710](https://openairdocs.org/sdr/ASAA2024110653710.md): Smoke Detector · faulted · Nov 6, 2024 · N472AS · Boeing 737990ER · Smoke Detection
  > AT FL 340 AFT CARGO FIRE LIGHT ILLUMINATED. FOLLOWED QRC PROCEDURE WHICH LED TO QRH PROCEDURE E2.1AND DISCHARGED FIRE BOTTLE. FCR INSPECTED AFT CARGO THERE WAS NO SIGN OF FIRE. HALON BOTTLE DID DISCHARGE. GROUNDED - YES. DIVERSION - REMOVED AND REPLACED #1 CAR
- [SDR ASAA2024091952689](https://openairdocs.org/sdr/ASAA2024091952689.md): Cover · detached · Sep 19, 2024 · N472AS · Boeing 737990ER · Emergency Lighting
  > AIRCRAFT LEFT AFT LAV D EMERGENCY LIGHT COVER CAME OFF DOOR. GROUNDED - YES. CHECKED AND FOUND LAV D EMERGENCY LIGHT LENS BROKEN, REPLACED PER AMM 33-51-01. OPS CHECK GOOD.
- [SDR ASAA2024091052477](https://openairdocs.org/sdr/ASAA2024091052477.md): Lamp · faulty · Sep 10, 2024 · N472AS · Boeing 737990ER · Emergency Lighting
  > WHILE T/C 78233008, FOUND R/H SLIDE LT INOP. GROUNDED - YES. RELAMPED R/H SLIDE LT PER 33-51-04. OPS CHECK NORMAL.
- [SDR ASAA2024052150060](https://openairdocs.org/sdr/ASAA2024052150060.md): Web · corroded · May 21, 2024 · N472AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO DOOR LWR SILL WEB CORRODED BETWEEN STA 827 TO STA 867. GROUNDED - YES. BLENDED CORR FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-60-15-1A-1 REMOVED & REPLACED SILL WEB UAW B737-900 SRM 51-40-02-0G-0W 1.25, O.045, R.038, L 2.25, D.007.
- [SDR ASAA2024051650061](https://openairdocs.org/sdr/ASAA2024051650061.md): Channel · corroded · May 16, 2024 · N472AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > FWD CARGO R/H TRANSITION CORRODED AT FS 500F-500G. GROUNDED - YES. REMOVED CORROSION, FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-00-53-1A-2. REPAIRED TRANSITION PANEL IAW B737-900 SRM 53-00-53-2R-5.W= 1.2 O=.040 R=.033 L= 5.00 D=.007.
- [SDR ASAA2024051149791](https://openairdocs.org/sdr/ASAA2024051149791.md): Skin · corroded · May 11, 2024 · N472AS · Boeing 737990ER · Fuselage Main, Plate/Skin
  > FUSELAGE SKIN FWD OF WTB HAVE MULTIPLE BELLY DRAINS WITH CORROSION. GROUNDED - YES. REMOVED CORR FOUND TO BE IN LIMITS IAW B737-900 SRM 53-30-01-1A-1 REFINSHED AREA IAW B737-900 SRM 51-20-01 SOPM 20-44-04 THIS IS A CAT B REPAIR WITH AN INSPECTION THRESHOLD OF
- [SDR ASAA2024051149788](https://openairdocs.org/sdr/ASAA2024051149788.md): Skin · corroded · May 11, 2024 · N472AS · Boeing 737990ER · Fuselage Main, Plate/Skin
  > FUSELAGE SKIN AFT OF WTB HAVE MULTIPLE BELLY DRAINS WITH CORROSION. GROUNDED - YES. REMOVED CORR FOUND TO BE IN LIMITS IAW B737-900 SRM 53-60-01-1A-1 REFINSHED AREA IAW B737-900 SRM 51-20-01, SOPM 20-44-04 THIS IS A CAT B REPAIR WITH AN INPECTION THRESHOLD OF
- [SDR ASAA2024043049354](https://openairdocs.org/sdr/ASAA2024043049354.md): Lamp · inoperative · Apr 30, 2024 · N472AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHTS "NOT ARMED" LIGHTS NEEDS RELAMPED. GROUNDED - YES. RELAMPED FLT DECK EMER LT INDICATOR NO OTHER DEFECTS NOTED STEVE NOTIFIED.
- [SDR ASAA2024021647915](https://openairdocs.org/sdr/ASAA2024021647915.md): Lens · missing · Feb 16, 2024 · N472AS · Boeing 737990ER · Emergency Lighting
  > BOTH OVERHEAD LIGHT COVERS MISSING AT MID CABIN RAFT. GROUNDED - YES. INSTALLED NEW LENS COVER FOR OVERHEAD EMERGENCY LIGHT ROWS 23R/H AND 1 R/H REF AMM 33-51-03-960-803, OPS CHECK GOOD.
- [SDR ASAA2023110646038](https://openairdocs.org/sdr/ASAA2023110646038.md): Unknown · unknown · Nov 6, 2023 · N472AS · Boeing 737990ER · HF Communications System
  > SAT 1 + 2 UNABLE TO CONNECT TO DISPATCH + MEDLINK. DIAL TONE ONLY. FA DEVICE FOR MEDLINK UNABLE TO CONNECT. GROUNDED - YES. (RESOLVED ON W/O: 1976140 TASKCARD: N/R-00004) ACCOMPLISHED AMM TASK 23-15-00 SATCOM COMMUNICATION SYSTEM TEST. OPS TEST NORMAL. ACCOMP
- [SDR ASAA2023110546004](https://openairdocs.org/sdr/ASAA2023110546004.md): Unknown · unknown · Nov 5, 2023 · N472AS · Boeing 737990ER · Engine Temperature Indicating System
  > WHILE ACCOMP TC 78273000 N'1 ENG ECONOMIC FAULT 77-20871 "TOP LEFT EGT SIGNAL OUT OF RANGE ". GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023110145975](https://openairdocs.org/sdr/ASAA2023110145975.md): Unknown · unknown · Nov 1, 2023 · N472AS · Boeing 737990ER · Communications System
  > SAT 1 WILL NOT MAKE A CALL OR RECEIVE A CALL. SAT 2 OPERATES NORMAL. GROUNDED - YES. CYCLED POWER. SUCCESSFULLY MADE PHONE CALLS VIA SAT 1 REF AMM 23-15-00/501.
- [SDR ASAA2023101945743](https://openairdocs.org/sdr/ASAA2023101945743.md): Power Supply · malfunctioned · Oct 19, 2023 · N472AS · Boeing 737990ER · Emergency Lighting
  > WHILE ACCOMPLISHING TASK CARD 78233001 LIGHTS AROUND THE L1 DOOR AND LEFT AFT OVERWING EXIT WENT OUT (EMERGENCY EXIT LIGHTS). GROUNDED - YES. REMOVED AND REPLACED BATTERIES FOR EMERGENCY EXIT LIGHT AT M1670 AND M1675 REF AMM 33-51-06-960-805, 2 C/B'S OPENED, T
- [SDR ASAA2023101645713](https://openairdocs.org/sdr/ASAA2023101645713.md): Unknown · unknown · Oct 16, 2023 · N472AS · Boeing 737990ER · Engine Temperature Indicating System
  > TECHNICAL SERVICES RECEIVED EXCEEDANCE R06 REPORT POSSIBLE EGT EXCEEDANCE ON TAKEOFF FOR #2 ENGINE. (#PRIAOG/ETOPS). GROUNDED - YES. (RESOLVED ON W/O: 1973776 TASKCARD: N/R-00001) FOUND RED BOX DISPLAYED ON #2 EGT INDICATION ON CENTER DU. ACCOMPLISHED ENGINE
- [SDR ASAA2023101445614](https://openairdocs.org/sdr/ASAA2023101445614.md): Unknown · unknown · Oct 14, 2023 · N472AS · Boeing 737990ER · Engine Temperature Indicating System
  > #2 ENG FAULT 77-20862 ECONOMIC FAULT BOTTOM LEFT EGT SIGNAL (T495S3) IS OUT OF RANGE. GROUNDED - YES. (RESOLVED ON W/O: 1973776 TASKCARD: N/R-00006) PERFORMED AMM TASK 71-00-00-800-804-F00 STEP 8(B) FOUND T523(S3) FAILED ON LAST 4 LEGS ON RECENT FAULT PAGE. P
- [SDR ASAA2023100245407](https://openairdocs.org/sdr/ASAA2023100245407.md): Unknown · unknown · Oct 2, 2023 · N472AS · Boeing 737990ER · Flight Management Computing Hardware System
  > DUAL FMC FAILURE AFTER LANDING. BOTH FMCS RESET PRIOR TO ANY PILOT ACTION. GROUNDED - YES. PERFORMED FMC SYSTEM TEST ON FMC 1 & 2. SYSTEM OPS CK NORMAL. REF 34-61-00-730-801 SEAMC CHRIS NOTIFIED.
- [SDR ASAA2023091345122](https://openairdocs.org/sdr/ASAA2023091345122.md): Unknown · unknown · Sep 13, 2023 · N472AS · Boeing 737990ER · Engine Indicating System
  > #2 ENG FAULT 77-20862 ECONOMIC FAULT BOTTOM LEFT EGT SIGNAL OUT OF RANGE. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023090745004](https://openairdocs.org/sdr/ASAA2023090745004.md): Unknown · unknown · Sep 7, 2023 · N472AS · Boeing 737990ER · Engine Indicating System
  > WHILE PERFORMING TASK CARD 78273000 FAULT 77-20862 #2 ENGINE BOTTOM LEFT EGT SIGNAL OUT OF RANCE WAS FOUND ECONOMIC FAULT. GROUNDED - YES. (RESOLVED ON W/O: 1968286 TASKCARD: N/R-00004) REF TSR714919. CLEANED T495S3 ELECTRICAL CONNECTOR REF FIM TASK 77-05 TAS
- [SDR ASAA2023090444917](https://openairdocs.org/sdr/ASAA2023090444917.md): Battery Pack · inoperative · Sep 4, 2023 · N472AS · Boeing 737990ER · Emergency Lighting
  > DURING EMERGENCY LIGHTS OPS CHECK FOUND EMERGENCY AISLE LIGHTS OVER SEAT ROWS 25DEF AND 29DEF INOP. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY LIGHTS BATTERY PACK AT MID CABIN POSITION BETWEEN SEAT ROWS 25DEF AND 29DEF PER AMM 33-51-06-960-805. OPS TEST GO
- [SDR ASAA2023072244150](https://openairdocs.org/sdr/ASAA2023072244150.md): Unknown · unknown · Jul 22, 2023 · N472AS · Boeing 737990ER · Cabin Cooling System
  > R/H PACK LIGHT ILLUMINATES ON RECALL, EXTINGWISHED WHENMASTER CAUTION PRESSED. GROUNDED - YES. (RESOLVED ON W/O: 1962807 TASKCARD: N/R-00002) CHECKED HISTORY 90 DAYS NONE FOUND. PERFORMED BITE PROCEDURE FOR BOTH PZTC PER FIM 21-62 TASK 801. NO ACTIVE FAULTS F
- [SDR ASAA2023072144149](https://openairdocs.org/sdr/ASAA2023072144149.md): Unknown · unknown · Jul 21, 2023 · N472AS · Boeing 737990ER · Cabin Pressure Control System
  > PRESSURIZATION AUTO FAIL & ALTN ANNUNICATOR ILLUMINATED AFTER LANDING. GROUNDED - YES. CYCLED CB'S AND ACCOMPLISHED DCPC BITE CHECK REF FIM 21-31-TASK 801. NO FAULT FOUND.
- [SDR ASAA2023063043843](https://openairdocs.org/sdr/ASAA2023063043843.md): Unknown · unknown · Jun 30, 2023 · N472AS · Boeing 737990ER · Flight Management Computing Hardware System
  > DURING CRUISE. RIGHT FMC FAILED MOMENTARILY AND WITHIN A FEW SECONDS RESET ITSELF. INDICATED BY VTK ON RIGHT SIDE. MAP FUNCTIONED NORMALLY. RIGHT FMC FUNCTIONED NORMALLY REMAINDER OF FLIGHT. GROUNDED - YES. ACCOMP B737-900 FIM 34-61 TASKS #801 & 824. SYS OPS C
- [SDR ASAA2023062543737](https://openairdocs.org/sdr/ASAA2023062543737.md): Transceiver · failed · Jun 25, 2023 · N472AS · Boeing 737990ER · HF Communications System
  > RTP DISPLAYS "FAIL FAIL" WHEN HF2 SELECTED. GROUNDED - YES. PERFORMED BITE PER FIM 23-11 TASK 801 FOR #2HF XCVR AND FOUND #2HF XCVR DEAD(INOP). REMOVED AND REPLACED #2HF XCVR. PERFORMED GOOD INSTALLATION TEST REF AMM 23-11-21/401.
- [SDR ASAA2023040242741](https://openairdocs.org/sdr/ASAA2023040242741.md): Harness · faulted · Apr 2, 2023 · N472AS · Boeing 737990ER · Engine Fuel System Wiring
  > ENG #2 MX MSG 75-20412 HPTACC POSITION DISAGREE. GROUNDED - YES. REPLACED J6 HARNESS ON W/O 1951595 NON ROUTINE 00004 NO FAULTS.
- [SDR ASAA2023040242740](https://openairdocs.org/sdr/ASAA2023040242740.md): Harness · faulted · Apr 2, 2023 · N472AS · Boeing 737990ER · Engine Fuel System Wiring
  > ENG #2 MX MSG 75-10462 HPTACC DEMAND AND POSITION SIGNALS DISAGREE. GROUNDED - YES. REPLACED J6 HARNESS REF B737-900 AMM 73-21-06 ACTUATOR TEST AND EEC BITE PASS NO FAULTS.
- [SDR ASAA2023040242739](https://openairdocs.org/sdr/ASAA2023040242739.md): Harness · faulted · Apr 2, 2023 · N472AS · Boeing 737990ER · Fuel Controlling System
  > ENG #2 MX MSG 75-10412 HPTACC POSITION SIGNALS DISAGREE. GROUNDED - YES. TROUBLESHOT PER B737-900 FIM TASK 75-21-803 AND 75-21-801 REPLACED J6 HARNESS ON W/O 1951595 NON ROUTINE 00004 NO FAULTS.
- [SDR ASAA2023032342572](https://openairdocs.org/sdr/ASAA2023032342572.md): Unknown · unknown · Mar 23, 2023 · N472AS · Boeing 737990ER · Flight Management Computing Hardware System
  > @360 FO FMC FAIL VTK. RAN QRH "FMC FAIL" - SINGLE FMC OPP. GROUNDED - YES. ON INITIAL EVALUATION FOUND BOTH FMCS OPERATING NORMALLY. ACCOMPLISHED FMCS BITE REF B737-900 FIM 34-61 TASK 801. FOUND INFLT MAINT MSG "RESYNC" FOR FMC R AND "PRES POS LAT-RATE" FOR FM
- [SDR ASAA2023030142134](https://openairdocs.org/sdr/ASAA2023030142134.md): Unknown · unknown · Mar 1, 2023 · N472AS · Boeing 737990ER · Cabin Temperature Control System
  > CONT CAB ZONE TEMP LIGHT ILLUMINATED AND WOULD NOT RESET W/ PUSH OF MASTER CAUTION RESET. RAN QRH PROCEDURE AND LIGHT EXTINGUISHED AFTER PUSHING TRIP RESET BUTTON. WORKED NORMALLY AFTER. GROUNDED - YES. PERFORMED PACK TEMP BIT TEST REF B737-900 FIM 21-62 TASK
- [SDR ASAA2023030142133](https://openairdocs.org/sdr/ASAA2023030142133.md): Valve · faulty · Mar 1, 2023 · N472AS · Boeing 737990ER · Cabin Cooling System
  > ZONE TEMP LIGHT OUT WITH MC RESET. GROUNDED - YES. DUE TO HISTORY REMOVED & REPLACE LEFT TCV AS A PRECAUTION, REF B737 AMM 21-51-10.
- [SDR ASAA2023022542078](https://openairdocs.org/sdr/ASAA2023022542078.md): Unknown · unknown · Feb 25, 2023 · N472AS · Boeing 737990ER · Flight Management Computing Hardware System
  > ON TAXI IN, FMC FAIL WITH VTK ON CA SIDE ILLUMINATED. GROUNDED - YES. FMC L CYCLING FAIL AND SYNC ERROR ON FMC R SENSOR PAGE. CYCLED POWER TO BOTH FMCS, NORMAL OPERATION RESTORED. FMC-L FLIGHT G INDICATES INTERMITTENT PROGRAM FAULT CORRELATED TO REPORTED FLIGH
- [SDR ASAA2023020441835](https://openairdocs.org/sdr/ASAA2023020441835.md): Switch · faulty · Feb 4, 2023 · N472AS · Boeing 737990ER · Engine Fuel Indicating System
  > FILTER BYPASS LH ENG. GROUNDED - YES. REF B737-900 FIM 73-05 TASK 801, FOUND FAULT MSG NBR 73-31071 FLIGHT LEG 0. REMOVED AND REPLACED #1 ENG FUEL FILTER, NO DEBRIS NOTED. REF B737-900 AMM 73-11-02-000-801-F00. REMOVED AND REPLACED FUEL FILTER DIFFERENTIAL PRE
- [SDR ASAA2023011321502](https://openairdocs.org/sdr/ASAA2023011321502.md): Battery Pack · inoperative · Jan 12, 2023 · N472AS · Boeing 737990ER · Emergency Lighting
  > R1 DOOR EMERGENCY EXIT LT, AISLE AREA LT AT ROW 1FD, R1 ESCAPE SLIDE LT, & R1 EXIT DOOR FLOOR PROXIMITY LT ARE INOP. GROUNDED - YES. FOUND EMERGENCY EXIT LTS POWER SUPPLY M02816 DEFECTIVE. REPLACED POWER SUPPLY WITH SERVICEABLE UNIT. R1 DOOR LT, R1 FLOOR PROXI
- [SDR ASAA2023011061463](https://openairdocs.org/sdr/ASAA2023011061463.md): Warning Message · false activation · Jan 6, 2023 · N472AS · Boeing 737990ER · Cabin Temperature Control System
  > UPON MASTER CAUTION RECALL, "CONT CAB" ZONE TEMP LIGHT ILLUMINATES. EXTINGUISHES UPON PUSHING MASTER CAUTION LIGHT. GROUNDED - YES. PERFORMED RIGHT PACK TEMP CONTROL BITE TEST REF B737-900 FIM 21-62 TASK 801. PACK/ZN CON - R, FLT DECK TRIM VALVE RED LIGHT ILLU
- [SDR ASAA2022121941138](https://openairdocs.org/sdr/ASAA2022121941138.md): Transceiver · failed · Dec 14, 2022 · N472AS · Boeing 737990ER · HF Communications System
  > HF 1 DISPLAYS FAIL IN BOTH WINDOWS. GROUNDED - YES. REPLACED #1 HF TRANSCEIVER REF B737-900 AMM 23-11-21. ORIG SUBMISSION DATE: 12/19/2022
- [SDR ASAA2022120641393](https://openairdocs.org/sdr/ASAA2022120641393.md): Valve · faulted · Dec 6, 2022 · N472AS · Boeing 737990ER · Engine Bleed Air System
  > REF ASA TASK CARD 78273000. FOUND FAULT CODE 75-30412 (HPTACC POSITION SIGNALS DISAGREE) ON ENG #2. GROUNDED - YES. REMOVED AND REPLACED #2 ENG HPTACC VALVE REF B737-900 AMM 75-21-01-400-801-F00. ( REF ASA LP 60485777)
- [SDR ASAA2022101440289](https://openairdocs.org/sdr/ASAA2022101440289.md): Battery Pack · inoperative · Oct 14, 2022 · N472AS · Boeing 737990ER · Emergency Lighting
  > ALL R2 DOOR EMERGENCY LIGHTS DO NOT COME ON. GROUNDED - YES. REPLACED R2 DOOR EMERGENCY LIGHT BATTERY PACK OPS CHECK GOOD IAW B737-900 AMM 33-51-06-960-805 STEP 4E.
- [SDR ASAA2022092140061](https://openairdocs.org/sdr/ASAA2022092140061.md): Indication Sys · activated · Sep 21, 2022 · N472AS · Boeing 737990ER · Fuel Controlling System
  > #1 ENG ENGINE VALVE INDICATION SHOWS BRIGHT/TRANSIENT WITH ENGINE SHUT OFF. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2022090939923](https://openairdocs.org/sdr/ASAA2022090939923.md): Platform · damaged · Sep 9, 2022 · N472AS · Boeing 737990ER · Turbine Engine Air Inlet Section
  > WHILE ACCOMPLISHING ASA T/C 78472010 FAN BLADE LUBRICATION FOUND PLATFORM #1, #16, #18 DAMAGED. GROUNDED - YES. REMOVED AND REPLACED PLATFORMS #1, #16 AND #18 REF ASA T/C 7847210.
- [SDR ASAA2022090439818](https://openairdocs.org/sdr/ASAA2022090439818.md): Control Panel · damaged · Sep 4, 2022 · N472AS · Boeing 737990ER · Autopilot System
  > MCP HEADING WINDOW DAMAGED. GROUNDED - YES. REMOVED AND REPLACED DFCS MODE CONTROL PANEL REF B737-900 AMM TASK 22-11-34.
- [SDR ASAA2022090339791](https://openairdocs.org/sdr/ASAA2022090339791.md): Lamp · cracked · Sep 3, 2022 · N472AS · Boeing 737990ER · Flight Management Computing Hardware System
  > MULTIPLE MODE SELECT BUTTONS ON FO FMC INOP. GROUNDED - YES. REMOVED AND REPLACED FO'S MCDU ASSEMBLY PER B737-900 AMM 34-61-01.
- [SDR ASAA2022090239794](https://openairdocs.org/sdr/ASAA2022090239794.md): Lamp · worn · Sep 2, 2022 · N472AS · Boeing 737990ER · Flight Management Computing Hardware System
  > FIRST OFFICER MCDU LSK 5R, 6R EXTREMELY WORN. GROUNDED - YES. REMOVED AND REPLACED FO'S MCDU KEYBOARD. OPS CHECK GOOD. REF B737-900 AMM 34-61-01/201.
- [SDR ASAA2022082339623](https://openairdocs.org/sdr/ASAA2022082339623.md): Regulator · failed · Aug 23, 2022 · N472AS · Boeing 737990ER · Pneumatic Distribution System
  > #1 ENGINE BLEED AIR WILL NOT SHUT OFF. GROUNDED - YES. REMOVED AND REPLACED THE BLEED AIR REGULATOR PER B737-900 AMM 36-11-03-000/400-801.
- [SDR ASAA2022082239626](https://openairdocs.org/sdr/ASAA2022082239626.md): Harness · damaged · Aug 22, 2022 · N472AS · Boeing 737990ER · Fuel Controlling System
  > FOUND CONNECTOR DP1103 TO THE WING GROUND ANTI ICE SOLENOID DISCONNECTED AND DAMAGED. GROUNDED - YES. REPLACED MW0311 HARNESS REF B737-900 AMM 73-21-06-400-802-F00.
- [SDR ASAA2022082239625](https://openairdocs.org/sdr/ASAA2022082239625.md): Actuator · leaking · Aug 22, 2022 · N472AS · Boeing 737990ER · Compressor Bleed Control
  > #1 ENGINE R/H VSV ACTUATOR LEAKING FROM DRAIN. GROUNDED - YES. REPLACED #1 ENGINE RH VSV ACTUATOR PER B737-900 AMM 75-31-01.
- [SDR ASAA2022082239620](https://openairdocs.org/sdr/ASAA2022082239620.md): Solenoid Valve · damaged · Aug 22, 2022 · N472AS · Boeing 737990ER · Airfoil Anti/De-ice System
  > WING GROUND THERMAL ANTI-ICE SOLENOID VALVE RECEPTACLE HAS VIBRATION DAMAGE. (REF ASA LOG 6039877) GROUNDED - YES. REPLACED GROUND WING THERMAL ANTI-ICE SOLENOID VALVE B737-900 AMM 30-11-12-400-801.
- [SDR ASAA2022082139624](https://openairdocs.org/sdr/ASAA2022082139624.md): Actuator · leaking · Aug 21, 2022 · N472AS · Boeing 737990ER · Compressor Bleed Control
  > #1 ENGINE LEFT VSV LEAKING FUEL 6DPM. GROUNDED - YES. REPLACED #1 ENGINE LH VSV ACTUATOR PER B737-900 AMM 75-31-01.
- [SDR ASAA2022082139597](https://openairdocs.org/sdr/ASAA2022082139597.md): Hmu · leaking · Aug 21, 2022 · N472AS · Boeing 737990ER · Fuel Controlling System
  > #1 ENGINE HMU AS EVIDENCE OF LEAKAGE AROUND THE BASE AREA. REPLACEMENT TO BE ACCOMPLISHED ON ASA T/C N8473002, N8473003. GROUNDED - YES. REMOVED AND REPLACED HMU & HEAT EXCHANGER PER ASA T/C N8473003.

Next page: https://openairdocs.org/aircraft/N472AS/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 = 'N472AS' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N472AS/reports

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