# Service difficulty reports: N938AK

A list on [N938AK](https://openairdocs.org/aircraft/N938AK.md).

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

- [SDR ASAA2026091468746](https://openairdocs.org/sdr/ASAA2026091468746.md): Light · inoperative · Sep 14, 2026 · N938AK · Boeing 7379 · Emergency Lighting
  > EMERGENCY SLIDE LIGHT AT L2 DOOR INOP. GROUNDED - YES. REMOVED AND REPLACED L2 DOOR EMERGENCY SLIDE LIGHT IAW AMM 33-51-04. OPS CHECKED GOOD.
- [SDR ASAA2026031865019](https://openairdocs.org/sdr/ASAA2026031865019.md): Seat Track · damaged · Mar 18, 2026 · N938AK · Boeing 7379 · Fuselage, Seat/Cargo Attach Fittings
  > RH INBD CAPTAIN SEAT TRACK DAMAGED AJ004. GROUNDED - YES. REMOVED AND INSTALLED RH INBD CAPTAIN SEAT TRACK IAW IPECO CMM 53-01-02, B737 AMM 25-11-01-00, 25-11-01-400-801, 25-50-11-910-801 SDR TO BE SUBMITTED.
- [SDR ASAA2026031865018](https://openairdocs.org/sdr/ASAA2026031865018.md): Seat Track · damaged · Mar 18, 2026 · N938AK · Boeing 7379 · Fuselage, Seat/Cargo Attach Fittings
  > LH INBD FIRST OFFICER SEAT TRACK DEMAGED AJ005. GROUNDED - YES. REMOVED AND REPLACED LH INBD CAPTAIN SEAT TRACK IAW IPECO CMM 53-01-02, B737 AMM 25-11-01-00, 25-11-01-400-801, 25-50-11-910-801, SDR TO BE SUBMITTED.
- [SDR ASAA2023110145985](https://openairdocs.org/sdr/ASAA2023110145985.md): Unknown · unknown · Nov 1, 2023 · N938AK · Boeing 7379 · APU Start/Ignition System
  > TWO UNSUCCESSFUL APU START ATTEMPTS ON TAXI IN. APU FAULT LIGHT ILLUMINATED BOTH TIMES. GROUNDED - YES. PERFORMED APU BITE AND OPS TEST REF AMM 49-11-00. COULD NOT DUPLICATE THE FAULT. NO DEFECTS NOTED AND OPS NORMAL.
- [SDR ASAA2023103145947](https://openairdocs.org/sdr/ASAA2023103145947.md): Light · missing · Oct 31, 2023 · N938AK · Boeing 7379 · Emergency Lighting
  > SEGMENT OF FLOOR EXIT PATH LIGHTING MISSING ROW 1 A/C LEFT. GROUNDED - YES. REPLACED ABOUT 2 1/2 FOOT SECTION OF PHOTOLUMINESCENT STRIP @ ROW 1 REF MM 33-51-960-801.
- [SDR ASAA2023103045948](https://openairdocs.org/sdr/ASAA2023103045948.md): Unknown · unknown · Oct 30, 2023 · N938AK · Boeing 7379 · Flight Management Computing Hardware System
  > FMC DISAGREE ON BOTH DISPAYS UNITS (L&R) RAN CHECKLIST LIGHTS NO LONGER DISPLAYED (FMC DISAGREE NO LONGER DISPLAYED). GROUNDED - YES. REMOVED PWR TO A/C FOR 2 MINUTES. ACCOMP BOTH FMC SENSOR STATUS CHECK BOTH SHOW OK. REF AMM 34-61-00-710-002 ONF HAS NO EXISTI
- [SDR ASAA2023101745707](https://openairdocs.org/sdr/ASAA2023101745707.md): Unknown · unknown · Oct 17, 2023 · N938AK · Boeing 7379 · Airfoil Anti/De-ice System
  > WING (L VALVE) LIGHT ILLUMINATED AND STAYED ON AFTER WING AINTI ICE WAS TURNED ON. GROUNDED - YES. PERFORMED LEFT WING THERMAL ANTI ICE VALVE HEALTH CHECK REF. AMM TASK 30-11-11-200-801. USED ALT DEAC. PROCEDURES FOR LE DEACTIVATION. REF. MPM 5-07-01 ITEM #3 O
- [SDR ASAA2023092645342](https://openairdocs.org/sdr/ASAA2023092645342.md): Sensor · faulty · Sep 26, 2023 · N938AK · Boeing 7379 · Power Indicating System
  > LEFT ENGINE RAN SMOOTHLY & MADE APPROPRIATE POWER ON TAKEOFF/ CLIMB, BUT, N1,N2 & FUEL FLOW FLUCTUATED NOTICABLY DURING CLIMB( NOT SURE ABOUT FLUCTUATION ON TAKEOFF). GROUNDED - YES. PRESENT FAULT ON OBS 73-44632 FAN SPEED N1 SENSOR LOW TOOTH SIGNALIS INVALID
- [SDR ASAA2023090945030](https://openairdocs.org/sdr/ASAA2023090945030.md): Unknown · unknown · Sep 9, 2023 · N938AK · Boeing 7379 · APU Start/Ignition System
  > APU FAULT LIGHT ON APU START FOLLOWED QRH, ATTEMPTED SECOND START FAULT LIGHT REAPPEARED, APU DID NOT START. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023081744649](https://openairdocs.org/sdr/ASAA2023081744649.md): Unknown · unknown · Aug 17, 2023 · N938AK · Boeing 7379 · Cabin Temperature Control System
  > "MAINT' ANNUNCIATOR LIGHT ON OVERHEAD PANEL ILLUMINATED. GROUNDED - YES. FOLLOWED IFIM 21-51-00-810-835 PERFORMED INITIAL EVALUATION AIR CONDITIONING IBIT RIGHT, ALL TEST GOOD. INTERMITTENT FAULT. NO HISTORY.
- [SDR ASAA2023080744469](https://openairdocs.org/sdr/ASAA2023080744469.md): Unknown · unknown · Aug 7, 2023 · N938AK · Boeing 7379 · Fuel Controlling System
  > WHILE ACCOMPLISHING T/C 05-020-01 DISCOVERED SMT MESSAGE ENG 2 EEC C2. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023080744468](https://openairdocs.org/sdr/ASAA2023080744468.md): Unknown · unknown · Aug 7, 2023 · N938AK · Boeing 7379 · Fuel Controlling System
  > WHILE ACCOMPLISHING T/C 05-020-01 DISCOVERED SMT MESSAGE ENG 2 EEC C1. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023072844293](https://openairdocs.org/sdr/ASAA2023072844293.md): Unknown · unknown · Jul 28, 2023 · N938AK · Boeing 7379 · HF Communications System
  > CPDLC SLOW TO SEND RECEIVE MESSAGE. CHECKED SATCOM AND FOUND BITE FAIL ON SAT-PHONE PAGE 2/2. PULLED CIRCUIT BREAKER PER QRH CHECKLIST. GROUNDED - YES. RESET SATCOM SDU CIRCUIT BREAKER AND PERFORMED SATCOM BITE PER B737-9 AMM 23-15-00 BITE SHOWS PASS AC OK FOR
- [SDR ASAA2023063043842](https://openairdocs.org/sdr/ASAA2023063043842.md): Unknown · unknown · Jun 30, 2023 · N938AK · Boeing 7379 · Flight Management Computing Hardware System
  > CPDLC WILL NOT ACCEPT CONFIRMATION MESSAGE RESULTING IN "OPEN" ATC MESSAGE. WORKED ON THE GROUND WHEN ACCEPTING PRE DEPARTURE CLEARANCE. AFTER ATTEMPTING TO RE-LOGIN, IT TOOK APPROXIMATELY 10 MINS FOR ATC TO ACCEPT LOGIN. GROUNDED - YES. RESET CPDLC SYS PER B7
- [SDR ASAA2023062543713](https://openairdocs.org/sdr/ASAA2023062543713.md): Oil Filter · clogged · Jun 25, 2023 · N938AK · Boeing 7379 · APU Oil System
  > FOUND OIL FILTER INDICATOR ON APU LUB MODULE OUT. GROUNDED - YES. REPLACED FILTER, REF INDICATOR. REF B737-9 AMM 49-91-12 LK CHECK GOOD.
- [SDR ASAA2023060443449](https://openairdocs.org/sdr/ASAA2023060443449.md): Modulating Valve · faulty · Jun 4, 2023 · N938AK · Boeing 7379 · Pneumatic Distribution System
  > OVERHEAD PANEL MAINT LIGHT ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED FAN AIR MODULATING VALVE ENG 2 REF B737-9 AMM 36-12-03-400-801. LRU AND PNEUMATICS TEST OPS CHK GOOD. ETOPS GROUND VERIFICATION SUCCESSFUL.
- [SDR ASAA2023053143413](https://openairdocs.org/sdr/ASAA2023053143413.md): Unknown · unknown · May 31, 2023 · N938AK · Boeing 7379 · Flight Management Computing Hardware System
  > ON LANDING ROLL OUT FMC DISAGREE APPEARED IN BOTH SCRATCH PADS. GROUNDED - YES. PER B737-9 IFIM 34-61-00-810-918. INITIAL EVAL. FAULT WAS NOT PRESENTING. RESET FMCS PER IFIM. CHECKED FOR FAULTS. NO FAULTS.
- [SDR ASAA2023051543303](https://openairdocs.org/sdr/ASAA2023051543303.md): Oil Filter · contaminated · May 15, 2023 · N938AK · Boeing 7379 · Engine Oil Distribution (Airframe Furnished)
  > #1 ENGINE IS ALERTING FOR OIL FILTER DELTA PRESSURE INCREASE AND APPROACHING OIL FILTER BYPASS INDICATION. GROUNDED - YES. PERFORMED STEPS 1-4 OF ASA TSR, FOUND NO ATA 79 FAULT MESSAGES, BUT FOUND SMALL METALLIC DEBRIS IN OIL FILTER ELEMENT. REMOVED AND REPLA
- [SDR ASAA2023051443254](https://openairdocs.org/sdr/ASAA2023051443254.md): Unknown · unknown · May 14, 2023 · N938AK · Boeing 7379 · Aircraft Fuel System
  > ENG #2 FWD FUEL PUMP "LOW PRESSURE" LIGHT DID NOT ILLUMINATE UNTIL SEVERAL MINUTES AFTER SHUTDOWN WITH FUEL PUMP SWITCH POSITIONED OFF. GROUNDED - YES. C/W ENG 2 FWD MAIN TANK FUEL PRESSURE SWITCHES INSTALLATION TEST REF B737-9 AMM TASK 28-42-11-420-801, OPS C
- [SDR ASAA2023041142804](https://openairdocs.org/sdr/ASAA2023041142804.md): Unknown · unknown · Apr 11, 2023 · N938AK · Boeing 7379 · Windshield/Door Rain/Ice Removal
  > R1 WINDSHIELD OVERHEAT ILLUMINATED ON THE GROUND DURING PRE-FLIGHT. RAN QRH LIGHT EXTINGUISHED. GROUNDED - YES. DUE TO HISTORY- SELECTED WHCU M323 TO OVERRIDE, REF B737-9 AMM 30-41-11. RT FWD (R-1) WINDOW HEAT OPS NORMAL, REF AMM 30-41-00, OK FOR SERVICE.
- [SDR ASAA2023041042789](https://openairdocs.org/sdr/ASAA2023041042789.md): Unknown · unknown · Apr 10, 2023 · N938AK · Boeing 7379 · Windshield/Door Rain/Ice Removal
  > DURING PREFLIGHT FLOW - RH FORWARD WINDOW HEAT OVERHEAT LIGHT ON- CAUTION LIGHT. GROUNDED - YES. PERFORMED WINDOW HEAT FAULT ISOLATION PER B737-9 IFIM 30-41-00-810-829 AND OPERATIONAL TEST PER B737-9 AMM 30-41-00-710-801, OPS CHECK GOOD, NO FAULTS NOTED.
- [SDR ASAA2023041042788](https://openairdocs.org/sdr/ASAA2023041042788.md): Unknown · unknown · Apr 10, 2023 · N938AK · Boeing 7379 · Windshield/Door Rain/Ice Removal
  > RH WINDOW HEAT OVERHEAT CAUTION LT CAME ON. GROUNDED - YES. RAN QRH, CONDITION CLEARED.
- [SDR ASAA2023031242375](https://openairdocs.org/sdr/ASAA2023031242375.md): Unknown · unknown · Mar 12, 2023 · N938AK · Boeing 7379 · APU Start/Ignition System
  > APU "FAULT" LIGHT WHILE ATTEMPTING START. GROUNDED - YES. IN OMF FOUND MAINT MESSAGE 49-41254 START CONVERTER UNIT SHOWS START SYSTEM INOP. PERFORMED GVI OF CONNECTOR P6 REF B737-9 AMM 49-11-01 AND B737-9 IFIM 49-40-00-810-818. NO DEFECTS NOTED. STARTED AND RA
- [SDR ASAA2023021341935](https://openairdocs.org/sdr/ASAA2023021341935.md): Unknown · unknown · Feb 13, 2023 · N938AK · Boeing 7379 · Flight Management Computing Hardware System
  > FMC #1 FAILED IN FLIGHT. RECOVERED ON ITS OWN AFTER ABOUT 3 MINUTES. NO SWITCHES MOVED. NO APPROACH LOADED. GROUNDED - YES. PERFORMED B737-9 IFIM 34-61-00-810-918. NO FAULTS NOTED.
- [SDR ASAA2023020841879](https://openairdocs.org/sdr/ASAA2023020841879.md): Valve · faulty · Feb 8, 2023 · N938AK · Boeing 7379 · Air Intake Anti/De-Ice System
  > DURING TAKEOFF WITH POWER SET, ANTI-ICE MASTER CAUTION ILLUMINATED. AFTER A FEW SECONDS THE LIGHT EXTINGUISHED. APPEARED TO BE AN ENGINE ANTI-ICE MASTER CAUTION. GROUNDED - YES. DUE TO HISTORY ON THE #1 ENGINE ANTI-ICE, REMOVED AND REPLACED THE #1 ENGINE ANTI-
- [SDR ASAA2022120941090](https://openairdocs.org/sdr/ASAA2022120941090.md): Anti-Ice Valve · warning light · Dec 9, 2022 · N938AK · Boeing 7379 · Airfoil Anti/De-ice System
  > WING ANTI - ICE L VALVE LIGHT STAYED ON WITH SWITCH ON. GROUNDED - YES. PERFORMED T/C MAX-30EA-24968. L WING ANTI-ICE LIGHT WAS EXTINGUISHED AND NO FAULTS POPULATED ON THE MFD.
- [SDR ASAA2022112140903](https://openairdocs.org/sdr/ASAA2022112140903.md): None · none · Nov 21, 2022 · N938AK · Boeing 7379 · Standard Practices/Structures
  > THE FLIGHT ATTENDANT REPORTED L2 DOOR WAS DIFFICULT TO OPEN. GROUNDED - YES. PERFORMED OPERATIONAL CHECK OF L-2 DOOR NO DEFECTS NOTED DOOR OPERATES NORMAL C/W OPS CK OF R-2 DOOR BOTH DOOR OPERATE SAME A/C OK FOR SERVICE REF B737-9 AMM 52-13-00.
- [SDR ASAA2022110640665](https://openairdocs.org/sdr/ASAA2022110640665.md): Coupler · malfunctioned · Nov 6, 2022 · N938AK · Boeing 7379 · Communications System Wiring
  > HF # 1 RECEIVES BUT DOES NOT TRANSMIT, APPEARS TO TUNE NORMALLY. GROUNDED - YES. FAULT CODE 23-21051 ACTIVE ON OMF EXISITING FAULTS. REMOVED AND REPLACED #1 HF COUPLER IAW B737-9 AMM 23-11-61. FAULT CODES NO LONGER PRESENT ON OMF. GROUND VERIFICATION SUCCESSF
- [SDR ASAA2022102040411](https://openairdocs.org/sdr/ASAA2022102040411.md): Antenna · faulty · Oct 20, 2022 · N938AK · Boeing 7379 · HF Communications System
  > HF 1 APPEARS TO NOT TRANSMIT. ABLE TO LISTEN AND RECEIVE ON BOTH HF 1 AND HF 2. SELCAL CHECKS GOOD BOTH RADIOS. SATCOM OPERATES NORMALLY. GROUNDED - YES. REPLACED #1 HF COUPLER REF B737-9 AMM 23-11-61/401. ALL OP-CHECKS NORMAL. ETOPS GROUND VERIFICATION GOOD.
- [SDR ASAA2022091639975](https://openairdocs.org/sdr/ASAA2022091639975.md): Anti-Ice System · warning light · Sep 16, 2022 · N938AK · Boeing 7379 · Air Intake Anti/De-Ice System
  > AFTER AIRSTART ON #1 ENGINE- ENGINE ANTI ICE LIGHT #1 ILLUMINATED. GROUNDED - YES. REMOVED ENG 1 A/I VLV CONNECTOR AND LOOSENED LOCK BOLT. UNABLE TO MOVE VALVE TO OPEN POS. SECURED BOLT AND RECONNECTED CONNECTOR. INSPECTED #1 ENGINE ANTI-ICE VALVE, VALVE MOVES
- [SDR ASAA2022081039450](https://openairdocs.org/sdr/ASAA2022081039450.md): Display · inaccurate · Aug 10, 2022 · N938AK · Boeing 7379 · Weather Radar System
  > WX RADAR DISPLAYS UNBELIEVABLE STRAIGHT LINE OF WEATHER RETURNS ABOUT 20 DEGREES RIGHT OF NOSE. GROUNDED - YES. PILOT REPORTS WXR WAS REPORTING WEATHER RETURN BUT NO VISABLE WEATHER COULD BE FOUND. PERFORMED WXR OP'S TEST NO FAULTS FOUND. NO MAINT. MESSAGES, N
- [SDR ASAA2022080139293](https://openairdocs.org/sdr/ASAA2022080139293.md): Shutoff Valve · warning light · Aug 1, 2022 · N938AK · Boeing 7379 · Pneumatic Distribution System
  > DESCENDING THROUGH FL230 IN CLEAR CONDITIONS,NO ANTI ICE ON, WE GOT MASTER CAUTION FOR ANTI-ICE.THE "ENG ANTI-ICE" LIGHT WAS ON FOR ENG #2 LIGHT IS STILL ON AFTER LANDING AND TAXI IN. QRH WAS COMPLETED, AVOIDED ICING CONDITIONS. GROUNDED - YES. MAINT MESSAGE 3

## 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 = 'N938AK' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N938AK/reports

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