# Service difficulty reports: N448AS

A list on [N448AS](https://openairdocs.org/aircraft/N448AS.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 · 156 reports

- [SDR ASAA2026092368887](https://openairdocs.org/sdr/ASAA2026092368887.md): Battery Pack · inoperative · Sep 23, 2026 · N448AS · Boeing 737990ER · Emergency Lighting
  > WHILE WORKING T/C 78233001, M1673 FAILED TEST. GROUNDED - YES. REPLACED BATTERY PACK M1673 REF AMM 33-51-06-960-805. OPS CHECK GOOD.
- [SDR ASAA2026031664965](https://openairdocs.org/sdr/ASAA2026031664965.md): Not Reported · faulted · Mar 16, 2026 · N448AS · Boeing 737990ER · Cabin Pressure Control System
  > RAMP REPORTED L1 DOOR NOT ABLE TO OPEN. GROUNDED - YES. FOUND AIRCRAFT SLIGHTLY PRESSURIZED, SHUT DOWN APU, BLED CABIN PRESSURE OFF, L1 DOOR OPEN AS NORMAL IAW AMM 49-11-00, OUTFLOW VALVE WAS FOUND SHUT. APU OPERATES NORMALLY.
- [SDR ASAA2026011563770](https://openairdocs.org/sdr/ASAA2026011563770.md): Landing Gear · faulted · Jan 15, 2026 · N448AS · Boeing 737990ER · Landing Gear Retraction/Extension System
  > GEAR WOULD NOT RETRACT AFTER TAKEOFF NORMAL LANDING BELOW MAX LANDING WEIGHT. GROUNDED - YES. PERFROMED PSEU BITE AND FAULT CHK, NO FAULTS FOUND. PERFORMED LANDING GEAR EXTENSION AND RETRACTION IAW AMM 32-32-00-710-801. OPENED 26 CBS. CYCLED NOSE AND MAIN LAND
- [SDR ASAA2025082660849](https://openairdocs.org/sdr/ASAA2025082660849.md): Web · corroded · Aug 26, 2025 · N448AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > FWD CARGO DOOR SCUFF PLATE SUB-STRUCTURE HAS MULTIPLE AREAS OF CORROSION. GROUNDED - YES. REMOVED CORROSION FROM FWD PIT CARGO DOOR LOWER WEB IAW SRM 53-30-15-1A-1 ORIGNAL MATERIAL THICKNESS IS 0.050 IAW SRM 53-30-15-01-1, REMOVED 0.020, REMAINING THICKNES
- [SDR ASAA2025082560923](https://openairdocs.org/sdr/ASAA2025082560923.md): Support · corroded · Aug 25, 2025 · N448AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > FWD CARGO COMPARTMENT AFT LEFT BULKHEAD SUPPORT STRUCTURE HAS CORROSION. GROUNDED - YES. REMOVED CORROSION FROM FWD PIT AFT L/H SIDE BULKHEAD SUPPORT IAW B737-900 SRM 53-30-08-1A-1, 100% MATERIAL LOSS AND FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-30-08-1A-
- [SDR ASAA2025082060624](https://openairdocs.org/sdr/ASAA2025082060624.md): Floorbeam · corroded · Aug 20, 2025 · N448AS · Boeing 737990ER · Fuselage Main, Floor Beam
  > CABIN FWD FLOOR WET AREA APPROX.STA.297 RBL 12, FLOORBEAM UPPER SURFACE CORRODED AROUND FASTENER HOLE (1EA). GROUNDED - YES. REMOVED CORROSION, ORIG THICK.080", REMOVED.033", REMAINING.047" FOUND OUT OF LIMITS IAW SRM 53-10-51, REMOVED AND REPLACED PANEL B
- [SDR ASAA2025020355696](https://openairdocs.org/sdr/ASAA2025020355696.md): Battery · inoperative · Feb 3, 2025 · N448AS · Boeing 737990ER · Emergency Lighting
  > REMOVE AND REPLACE 3 BATTERY PACKS FOR EMERGENCY LIGHTING. GROUNDED - YES. REMOVE AND REPLACE 3 BATTERY PACKS FOR EMERGENCY LIGHTING. (S/N 414543, 414591, 414541)
- [SDR ASAA2024082852166](https://openairdocs.org/sdr/ASAA2024082852166.md): Battery Pack · no test · Aug 28, 2024 · N448AS · Boeing 737990ER · Emergency Lighting
  > WHILE PERFORMING T/C 78233008, FOUND LEFT AFT OVERWING EXIT EMERGENCY BATTERY PACK INOP. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY BATTERY PACK AT L, 7-8 WINDOWS AFT OF AFT OVERWING EXIT, FOOT PANEL REF AMM 33-51-06. OPS CHECK GOOD. OK FOR SERVICE.
- [SDR ASAA2024061950444](https://openairdocs.org/sdr/ASAA2024061950444.md): Door · abnormal · Jun 19, 2024 · N448AS · Boeing 737990ER · Landing Gear Retraction/Extension System
  > LANDING GEAR FAILED TO RETRACT AFTER TAKE-OFF FOUND MAIN GEAR ACCESS PANEL DOOR NOT FULLY CLOSED MADE OVERWEIGHT LANDING 165.0LBSNO HARD LANDING. GROUNDED - YES. AIR TURNBACK - ACCOMPLISHED GENERAL VISUAL INSPECTION OF ALL 3 GEARS NO DEFECTS NOTED. ACCOMPLISHE
- [SDR ASAA2023121846838](https://openairdocs.org/sdr/ASAA2023121846838.md): Unknown · unknown · Dec 18, 2023 · N448AS · Boeing 737990ER · Emergency Lighting
  > CABIN EMERGENCY LIGHT C/B POPPED. GROUNDED - YES. RESET CB REF AMM 20-60-01-860-801 CYCLED EMERGENCY LIGHTS OPS CHECK OK.
- [SDR ASAA2023101145565](https://openairdocs.org/sdr/ASAA2023101145565.md): Unknown · unknown · Oct 11, 2023 · N448AS · Boeing 737990ER · Autopilot System
  > WHILE PERFORMING TC 78222000 - SYS. FAILS AILERON TEST. BITE 60-31. MSG 1111340 CAME UP SEVERL TIMES. PER FIM AN FFC SWAP IS REQ. FOR T/S. RMVD AND INSATLLED NEW FCC B. NO HELP. NEW FAIL MSG 22-11146. "AILERON SENSOR 2M937" REQ REPLACEEMENT. REINSTALLED ORIGIN
- [SDR ASAA2023100145393](https://openairdocs.org/sdr/ASAA2023100145393.md): Unknown · unknown · Oct 1, 2023 · N448AS · Boeing 737990ER · Flight Management Computing Hardware System
  > FMC DISAGREE FMC MESSAGE APPEARED ON BOTH FMC SCRATCHPADS AND MAP DISPLAYS AFTER LANDING. MESSAGE DISAPPEARED WITH SHUTDOWN CHECK. GROUNDED - YES. PERFORMED FIM TASK 34-61 836 - CYCLED FMC. ALIGNED ADIRUS - NO FAULT MESSAGE DISPLAYED. AIRCRAFT OK FOR SERVICE.
- [SDR ASAA2023092645338](https://openairdocs.org/sdr/ASAA2023092645338.md): Starter · faulty · Sep 26, 2023 · N448AS · Boeing 737990ER · Engine Cranking
  > #2 ENG WOULD NOT START- N2 WOULD NOT GET ABOVE 15%. CROSSBLEED START ALSO UNSUCCESSFUL- N2 LESS THAN 15%. GROUNDED - YES. REPLACED #2 ENG STARTER REF AMM 80-11-01 LK AND OPS CK GOOD.
- [SDR ASAA2023092145238](https://openairdocs.org/sdr/ASAA2023092145238.md): Battery · inoperative · Sep 21, 2023 · N448AS · Boeing 737990ER · Emergency Lighting
  > MULTIPLE EMERGENCY LIGHTS OUT. GROUNDED - YES. REMOVED AND INSTALLED 4 EA BATTERY PACKS AT R1 SNF R2 AND LH ROW 7 AND LH ROW 26 OPS CK GOOD IAW B737-900 AMM 33-51-06-960-805.
- [SDR ASAA2023082644790](https://openairdocs.org/sdr/ASAA2023082644790.md): Unknown · unknown · Aug 26, 2023 · N448AS · Boeing 737990ER · Windshield/Door Rain/Ice Removal
  > FO R2 WINDOW OVERHEAT ON CLIMBOUT. GROUNDED - YES. INFO ONLY NOTED.
- [SDR ASAA2023082444779](https://openairdocs.org/sdr/ASAA2023082444779.md): Unknown · unknown · Aug 24, 2023 · N448AS · Boeing 737990ER · Windshield/Door Rain/Ice Removal
  > RIGHT SIDE WINDOW HEAT OVERHEAT LIGHT ILLUMINATED ENROUTE AT FL 350.SYS WAS RESET IAW AS NORMAL CHECKLIST PROCEDURE WITH NO FURTHER INCIDENCE. GROUNDED - YES. RIGHT SIDE WINDOW HEAT CONTOL UNIT SYSTM-TEST WORK NORMAL. REF AMM 30-41-11/501.
- [SDR ASAA2023082344811](https://openairdocs.org/sdr/ASAA2023082344811.md): Window · faulty · Aug 23, 2023 · N448AS · Boeing 737990ER · Flight Compartment Windows
  > TECH SERVICES REQUEST TO REPLACE R-2 SLIDING WINDOW ASSY DUE TO NUMEROUS REPORTS OF SIDE WINDOW OVERHEAT LIGHT ILLUMINATING----(#PRI2)----. GROUNDED - YES. REMOVED AND REPLACED THE R/H R2 SLIDING WINDOW ASSY. PER AMM 56-12-11. PERFORMED HEAT TEST AND CABIN PRE
- [SDR ASAA2023082344752](https://openairdocs.org/sdr/ASAA2023082344752.md): Unknown · unknown · Aug 23, 2023 · N448AS · Boeing 737990ER · Windshield/Door Rain/Ice Removal
  > ON CLIMB OUT THROUGH 30,000' R2 WINDOW OVER HEAT ILLUMINATED RAN QRH 3.6 WINDOW OVERHEAT LIGHT EXTINGUISHED. GROUNDED - YES. ACCOMP WINDOW HEAT TEST OVHT/PWR TEST, TEST PASS REF AMM 30-41-00-860-003.
- [SDR ASAA2023082344724](https://openairdocs.org/sdr/ASAA2023082344724.md): Module · faulty · Aug 23, 2023 · N448AS · Boeing 737990ER · Pitot/Static Anti-Ice System
  > RIGHT ALPHA VANE LIGHT AFTER ENGINE START. GROUNDED - YES. REMOVED AND REPLACED OVERHEAD P5 PROBE/WINDOW HEAT PANEL IAW B737-900 AMM TASK 30-41-41-000/400-801. INSTALL TEST PASSES, HEATERS WORK NORMALLY. HAD QUALIFIED TECH RUN ENGINE TO CHECK AUTO FUNCTION REF
- [SDR ASAA2023082244735](https://openairdocs.org/sdr/ASAA2023082244735.md): Unknown · unknown · Aug 22, 2023 · N448AS · Boeing 737990ER · Windshield/Door Rain/Ice Removal
  > ON CLIMBOUT, R2 WINDOW OVERHEAT ILLUMINATED GROUNDED - YES. RAN QRH 3.6 WINDOW OVERHEAT. LIGHT EXTINGUISHED.
- [SDR ASAA2023081844675](https://openairdocs.org/sdr/ASAA2023081844675.md): Aoa · faulty · Aug 18, 2023 · N448AS · Boeing 737990ER · Ice/Rain Protection System
  > RIGHT ALPHA VANE LIGHT AFTER ENGINE START. GROUNDED - YES. REMOVED AND REPLACED RAOA PULLED AND COLLARD C/B'S IN REF WITH AMM 34-21-05-400-801. CLOSED ALL C/B"S PERFORMED ALL REQUIRED TEST SUCCESSFULLY. OPS TEST GOOD.
- [SDR ASAA2023081744662](https://openairdocs.org/sdr/ASAA2023081744662.md): Packing · degraded · Aug 17, 2023 · N448AS · Boeing 737990ER · Turbine Engine Oil System
  > #1 ENGINE OIL FILLER CAP PACKING NEEDS REPLACEMENT. GROUNDED - YES. REMOVED & REPLACED #1 ENGINE OIL FILLER CAP PACKING WITH NEW. REF AMM 79-11-01.
- [SDR ASAA2023081544643](https://openairdocs.org/sdr/ASAA2023081544643.md): Aoa · malfunctioned · Aug 15, 2023 · N448AS · Boeing 737990ER · Pitot/Static Anti-Ice System
  > AFTER ENGINE START R ALPHA VANE CAUTION ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED R/H AOA VANE REF AMM 34-21-05/401. 4 C/B'S OPENED, TAGGED, AND RESET. ALL OP AND LLM TESTS PASS. R ALPHA VANE LIGHT REMAINS EXTINGUISHED DURING TESTING.
- [SDR ASAA2023080144369](https://openairdocs.org/sdr/ASAA2023080144369.md): Unknown · unknown · Aug 1, 2023 · N448AS · Boeing 737990ER · Windshield/Door Rain/Ice Removal
  > ON DESCENT AT APPROXIMATELY 8,000', R2 WINDOW OVERHEAT LIGHT ILLUMINATED, AFTER THROUGH MOISTURE. GROUNDED - YES. FOLLOWED QRH, LIGHT NEVER RE-ILLUMOINATED.
- [SDR ASAA2023052643374](https://openairdocs.org/sdr/ASAA2023052643374.md): Unknown · unknown · May 26, 2023 · N448AS · Boeing 737990ER · Windshield/Door Rain/Ice Removal
  > RIGHT SIDE WINDOW HEAT, OVERHEAT CAUTION. GROUNDED - YES. RIGHT SIDE WINDOW, PRIMARY TEMP SENSOR HAS OPEN CIRCUIT. SWAPPED FROM PRIMARY TO SECONDARY WINDOW HEAT SENSOR, OPS CHECKS OK. REF B737-900 FIM 30-41 TASK 801 & 811, B737-900 AMM 30-41-21 & 30-41-00.
- [SDR ASAA2023052143296](https://openairdocs.org/sdr/ASAA2023052143296.md): Transceiver · inoperative · May 21, 2023 · N448AS · Boeing 737990ER · Weather Radar System
  > TURNED RADAR ON PRIOR TO TAKEOFF. WXR FAIL AND PW FAIL #1 AND #2 NAV DISPLAYS. GROUNDED - YES. REMOVED AND REPLACED WEATHER RADAR RECEIVER/TRANSMITTER IN REFERENCE WITH B737-900 AMM 34-43-41-400-801. PERFORMED OPERATIONAL CHECK IN REFERENCE WITH AMM 34-43-41-7
- [SDR ASAA2023050643138](https://openairdocs.org/sdr/ASAA2023050643138.md): Coffeemaker · fumes · May 6, 2023 · N448AS · Boeing 737990ER · Buffet/Galleys
  > DURING CRUISE, "A" FA REPORTED TRANSIENT FUMES (LEVEL 1 IN F.O.M.) WHEN FORWARD GALLEY UPPER COFFEE MAKER WAS TURNED ON. COFFEE MAKER WAS TURNED OFF AND FUMES DISSIPATED IMMEDIATELY. FA DESCRIBED THE FUMES SMELL AS MODERATELY STRONG AND ELECTRICAL POSSIBLY FRO
- [SDR ASAA2023041042835](https://openairdocs.org/sdr/ASAA2023041042835.md): Modulating Valve · faulted · Apr 10, 2023 · N448AS · Boeing 737990ER · Cabin Cooling System
  > RIGHT PACK LIGHT ILLUMINATES DURING MASTER CAUTION RECALL AND RESETS WHEN MASTER CAUTION PRESSED. GROUNDED - YES. REMOVED AND REPLACED NUMBER 2 TEMPERATURE CONTROL VALVE IAW B737-900 AMM 21-51-10-000-801 AND 21-51-10-400-801.
- [SDR ASAA2023031442365](https://openairdocs.org/sdr/ASAA2023031442365.md): Transceiver · failed · Mar 14, 2023 · N448AS · Boeing 737990ER · HF Communications System
  > HF #1 FAIL-FAIL INDICATION. GROUNDED - YES. REMOVED AND REPLACED #1 HF TXCVR REF B737-900 AMM 23-11-21.
- [SDR ASAA2023031342321](https://openairdocs.org/sdr/ASAA2023031342321.md): Lamp · inoperative · Mar 13, 2023 · N448AS · Boeing 737990ER · Emergency Lighting
  > L2 DOOR SLIDE EMERGENCY LIGHT BULB OUT. GROUNDED - YES. RELAMPED & TESTED L2 DOOR SLIDE LIGHT BULB REF B737-900 AMM 33-51-04. OPS TEST GOOD.
- [SDR ASAA2023030142123](https://openairdocs.org/sdr/ASAA2023030142123.md): Controller · faulty · Mar 1, 2023 · N448AS · Boeing 737990ER · Cabin Cooling System
  > RIGHT PACK LIGHT ILLUMINATES ON MASTER CAUTION RECALL LIGHT RESETS WITH MC RECALL. GROUNDED - YES. REMOVED AND REPLACED RIGHT PACK TEMP CONTROLLER REF B737-900 AMM TASK 21-61-17-400-801.
- [SDR ASAA2023020641848](https://openairdocs.org/sdr/ASAA2023020641848.md): Not Reported · not reported · Feb 6, 2023 · N448AS · Boeing 737990ER · Flight Management Computing Hardware System
  > AFTER LANDING FMC INTERMITTENTLY CUT OUT ON CAPTAIN'S SIDE. GROUNDED - YES. PER B737-900 FIM 34-61 TASK 801 + 807 FMCL KEEPS CYCLING. BITE INFLIGHT FAULT SHOWS FMC-L PGM FAULT. RESET AIRCRAFT POWER. FMC OPERATION RETURNED. OPS CHECK NORMAL.
- [SDR ASAA2023013141744](https://openairdocs.org/sdr/ASAA2023013141744.md): Unknown · unknown · Jan 31, 2023 · N448AS · Boeing 737990ER · Flight Management Computing Hardware System
  > ON DESCENT FO FMC DISPLAY BLANK AND ALL ANNUNCIATOR LIGHTS ILLUMINATED. GROUNDED - YES. AFTER 1 MIN, RESET ITSELF. OPS NORMAL REMAINDER OF FLIGHT.
- [SDR ASAA2023013011681](https://openairdocs.org/sdr/ASAA2023013011681.md): Pressure Switch · inoperative · Jan 21, 2023 · N448AS · Boeing 737990ER · Fuel Boost Pump
  > FOLLOW-UP TO HISTORY OF #2 TANK AFT PUMP LOW PRESSURE LIGHT INOP----(#PRI2)----ETOPS SIGNIFICANT SYSTEM----. GROUNDED - YES. (RESOLVED ON W/O: 1939840 TASKCARD: N/R-00001) REMOVED AND REPLACED #2 TANK AFT PUMP PRESSURE SWITCH REF. B737-900 AMM 28-42-11. OPERA
- [SDR ASAA2023011641782](https://openairdocs.org/sdr/ASAA2023011641782.md): Battery Pack · failed · Jan 16, 2023 · N448AS · Boeing 737990ER · Emergency Lighting
  > AFT RH CABIN EMERG. LIGHTS DO NOT ILLUMINATE IN THE CEILING. GROUNDED - YES. REMOVED & REPLACED BATT. M2627 REF B737-900 AMM 33-51-06.
- [SDR ASAA2023011951559](https://openairdocs.org/sdr/ASAA2023011951559.md): Modulating Valve · faulted · Jan 15, 2023 · N448AS · Boeing 737990ER · Cabin Cooling System
  > RIGHT PACK LIGHT ILLUMINATED IN TAXI. EXTINGUISHES WITH MASTER RESET. GROUNDED - YES. REMOVED & REPLACED R. PACK TEMP CONTROL VALVE, REF B737-900 AMM 21-51-10.
- [SDR ASAA2022111940881](https://openairdocs.org/sdr/ASAA2022111940881.md): Warning Message · false activation · Nov 19, 2022 · N448AS · Boeing 737990ER · Windshield/Door Rain/Ice Removal
  > PILOTS FWD WINDOW HEAT OVERHEAT LIGHT ILLUMINATE. GROUNDED - YES. ACCOMPLISHED B737-900 FIM 30-41-801 WHCU BITE PROCEDURE NO FAULTS FOUND ON BITE PROCEDURE L FWD WINDOW HEAT NORMAL. FOUND CB POPPED.
- [SDR ASAA2022090639828](https://openairdocs.org/sdr/ASAA2022090639828.md): Control Panel · faulty · Sep 6, 2022 · N448AS · Boeing 737990ER · Detection System
  > CARGO CPT FIRE DETECT FAULT LIGHT & FWD WOULD NOT ILLUMINATE. GROUNDED - YES. REMOVED AND REPLACED CARGO FIRE CONTROL PANEL. REF B737-900 AMM 26-00-02/401.
- [SDR ASAA2022090339789](https://openairdocs.org/sdr/ASAA2022090339789.md): Spacer · debonded · Sep 3, 2022 · N448AS · Boeing 737990ER · Turbine Engine Air Inlet Section
  > WHILE ACCOMPLISHING OF T/C #78472010, FAN BLADE LUBRICATION, FOUND #17 FAN BLADE SPACER W/ DISBONDED ELASTOMER. REQUIRES REPLACEMENT. GROUNDED - YES. DURING ACCOMPLISHMENT OF T/C #78472010, REPLACED #17 FAN BLADE SPACER. COMPLETED T/C WITH NO FURTHER DEFECT NO
- [SDR ASAA2022082339611](https://openairdocs.org/sdr/ASAA2022082339611.md): Spacer · debonded · Aug 23, 2022 · N448AS · Boeing 737990ER · Turbine Engine Air Inlet Section
  > WHILE ACCOMPLISHING ASA T/C #78472010, FAN BLADE LUBRICATION, FOUND #4 SPACER W/ DISBONDED ELASTOMER. REQUIRES REPLACEMENT. GROUNDED - YES. REPLACED #4 SPACER REF ASA T/C 78472010.
- [SDR ASAA2022081939600](https://openairdocs.org/sdr/ASAA2022081939600.md): Modulating Valve · failed · Aug 19, 2022 · N448AS · Boeing 737990ER · Cabin Cooling System
  > RIGHT HAND PACK LIGHT ILLUMINATES ON RECALL AND RESETS WITH MASTER CAUTION RESET. GROUNDED - YES. REMOVED AND REPLACED RH TRIM MODULATING VALVE REF B737-900 AMM 21-51-10.
- [SDR ASAA2022080839464](https://openairdocs.org/sdr/ASAA2022080839464.md): Control Valve · dirty · Aug 8, 2022 · N448AS · Boeing 737990ER · Cabin Cooling System
  > RH PACK LIGHT ILLUMINATED ON MASTER CAUTION RECALL. RESET WITH MC RESET. GROUNDED - YES. ACCOMPLISHED BITE ON BOTH TEMP CONTROLLERS REF B737-900 FIM 21-61 TASK 801.FOUND #2 CONTROLLER TEMP CTRL VALVE FAULT 21-51267 PACK TCV & TEMP CNTRL VALVE 21-51264 TCV STAY
- [SDR ASAA2022072539252](https://openairdocs.org/sdr/ASAA2022072539252.md): Unknown · unknown · Jul 25, 2022 · N448AS · Boeing 737 · Detection System
  > FWD CARGO FIRE LIGHT DID NOT TEST PROPERLY FIRST THREE ATTEMPTS. GROUNDED - YES. PERFORMED B737-900 FIM 26-23 TASK 801 FWD (M2236) CEU BITE TEST PASSED W/ NO FAULTS FOUND AT THIS TIME.
- [SDR ASAA2022072439166](https://openairdocs.org/sdr/ASAA2022072439166.md): Unknown · faulty · Jul 24, 2022 · N448AS · Boeing 737 · HF Communications System
  > #2 HF RADIO DOES NOT TRANSMIT. RECEIVES NORMALLY. GROUNDED - YES. REPLACED #2 HF TRANSCEIVER REF B737-900 AMM 23-11-21. OPS CHECKS GOOD.
- [SDR ASAA2022053138547](https://openairdocs.org/sdr/ASAA2022053138547.md): Start Valve · faulty · May 31, 2022 · N448AS · Boeing 737990ER · Engine Starter
  > ENG 1 START VALVE OPEN LIGHT REMAINED ON DURING ENG START. RAN QRH PROCEDURE + SHUT DOWN. GROUNDED - YES. REMOVED AND REPLACED #1 ENGINE START VALVE REF B737-900 AMM 80-11-03-400-801-F00. OPS AND LEAK CHECKS GOOD.
- [SDR ASAA2022050138190](https://openairdocs.org/sdr/ASAA2022050138190.md): Valve · failed · May 1, 2022 · N448AS · Boeing 737990ER · Pneumatic Distribution System
  > CABIN CLIMB RATE ON PRESSURIZATION FLUCTUATED UP/DOWN ENTIRE FLIGHT. CABIN RATE +/- 100 FPM UP TO +300 FPM WITH ADDITION OF THRUST AND -500 FPM WITH THRUST REDUCTION. DURING CLIMB DUCT PRESS SPLIT +/- 10 PSI WITH MAX SPLIT OF +/- 15 PSI IN CRUISE WITH LARGE PO
- [SDR ASAA2022033037855](https://openairdocs.org/sdr/ASAA2022033037855.md): Fire Detector · inoperative · Mar 30, 2022 · N448AS · Boeing 737990ER · Smoke Detection
  > #1 ENGINE FIRE DETECTION LOOP A IS INOPERATIVE. ("A" LOOP DOESN'T TEST AND FAULT LIGHT ILLUMINATED). GROUNDED - YES. REF TSR711760, 2 DECTECTOR HARNESS & FAN LOOP ASSY REPLACED & OPS TEST NORMAL
- [SDR ASAA2022031637701](https://openairdocs.org/sdr/ASAA2022031637701.md): Control Valve · faulty · Mar 16, 2022 · N448AS · Boeing 737990ER · Cabin Cooling System
  > SAME ISSUE AS LO 60259389 +/-3 PSI DUCT PRESSURE OSCILLATION AND CABIN RATIO OSCILLATION +/-3. GROUNDED - YES. C/W PACK FLOW TEMPERATURE CONTROLLER BITE REF B737-900 AMM 21-61-00-740-801-002, NO EXISTING FAULTS FOUND, HISTORY SHOWS FLOW CONTROL VALVE FAULT # 2
- [SDR ASAA2022031437684](https://openairdocs.org/sdr/ASAA2022031437684.md): Unknown · unknown · Mar 14, 2022 · N448AS · Boeing 737990ER · HF Communications System
  > HF #2 SHOWS FAIL / FAIL. GROUNDED - YES. CYCLED C/B, SYS RESTORED & OPS CKS NML PER B737-900 AMM 23-11-00 AND COMM CK. GND VERIFICATION SUCCESSFUL.
- [SDR ASAA2022022437542](https://openairdocs.org/sdr/ASAA2022022437542.md): Unknown · unknown · Feb 24, 2022 · N448AS · Boeing 737990ER · Windshield/Door Rain/Ice Removal
  > R2 WINDOW HEAT OVERHEAT LIGHT ILLUMINATED AFTER PUSHBACK. GROUNDED - YES. PERFORMED WHCU BITE TEST NO FAULT NOTED B737-900 FIM 30-41 TASK 801, WINDOW HEAT SYSTEM OPS TEST NORMAL B737-900 AMM 30-41-00-710-801, WINDOW SENSOR & FILM RESISTANCE TESTS WITHIN LIMIT

Next page: https://openairdocs.org/aircraft/N448AS/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 = 'N448AS' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N448AS/reports

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