# Service difficulty reports: N977AK

A list on [N977AK](https://openairdocs.org/aircraft/N977AK.md).

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

- [SDR ASAA2026101169221](https://openairdocs.org/sdr/ASAA2026101169221.md): Light · intermittent · Oct 11, 2026 · N977AK · Boeing 7379 · Emergency Lighting
  > 17A EMERGENCY LIGHT FLICKERING. GROUNDED - YES. PREVIOUSLY WRITTEN UP. REF LP 61339523. VERIFIED WITH SEAMC THAT MEL IS APPLICABLE.
- [SDR ASAA2026060266464](https://openairdocs.org/sdr/ASAA2026060266464.md): Placard · out of position · Jun 2, 2026 · N977AK · Boeing 7379 · Placards and Markings
  > ROW 16DEF "EXIT/SALIDA" PLACARD HAS DIRECTION ARROW FACING THE WRONG WAY AWAY FROM EMERGENCY EXIT. GROUNDED - YES. REPLACED EXIT LENS FLOOR COVER ROW 16DEF PER AMM 33-51-01.
- [SDR ASAA2026011463825](https://openairdocs.org/sdr/ASAA2026011463825.md): Seat Track · worn · Jan 14, 2026 · N977AK · Boeing 7379 · Fuselage, Seat/Cargo Attach Fittings
  > FUSELAGE INTERIOR, COCKPIT, PILOT AND FIRST OFFICERS INBD AFT SEAT TRACK LOCK PIN HOLES ARE OUT OF LIMITS. GROUNDED - YES. R & R THE SEAT TRACKS (2EA) AFT INBD OF THE PILOT AND FIRST OFFICERS SEATS AT COCKPIT IAW CMM 25-11-39, AMM 25-11-01-400-801, 25-11-01-
- [SDR ASAA2026011463824](https://openairdocs.org/sdr/ASAA2026011463824.md): Seat Track · worn · Jan 14, 2026 · N977AK · Boeing 7379 · Fuselage, Seat/Cargo Attach Fittings
  > FUSELAGE INTERIOR, COCKPIT, PILOT AND FIRST OFFICERS INBD AFT SEAT TRACK LOCK PIN HOLES ARE OUT OF LIMITS. GROUNDED - YES. R & R THE SEAT TRACKS (2EA) AFT INBD OF THE PILOT AND FIRST OFFICERS SEATS AT COCKPIT IAW CMM 25-11-39, AMM 25-11-01-400-801, 25-11-01-4
- [SDR ASAA2025033157312](https://openairdocs.org/sdr/ASAA2025033157312.md): Skin · damaged · Mar 31, 2025 · N977AK · Boeing 7379 · Fuselage Main, Plate/Skin
  > EXTERIOR FUSELAGE, LIGHTNING STRIKE FOUND AT STA 500E BETWEEN S-5L AND S-6L. GROUNDED - YES. ACCOMPLISHED REPAIR PER ASA EA M9-53EA-28524 REV 00. THIS IS A CATEGORY B REPAIR. DTI DUE WITHIN 24MTHS FROM 12APR2025.
- [SDR ASAA2023110846126](https://openairdocs.org/sdr/ASAA2023110846126.md): Unknown · unknown · Nov 8, 2023 · N977AK · Boeing 7379 · Fuel Controlling System
  > GE DIAGNOSTICS REPORTS THE #2 ENGINE IS GENERATING ALERTS FOR PS3 OUT OF RANGE, PS3 PRESSURE DISAGREE FAULT, P3B OUT OF RANGE, P3B PRESSURE DISAGREE FAULT, OR P3B VS PS3 PRESSURE DISAGREE FAULT. (TASK CARD 73-ASA-01)(#PRI 1) CNR # 20231108022ETOPS SIGNIFICANT
- [SDR ASAA2023110846081](https://openairdocs.org/sdr/ASAA2023110846081.md): Unknown · unknown · Nov 8, 2023 · N977AK · Boeing 7379 · Fuel Controlling System
  > #2 ENGINE CONTROL LIGHT ILLUMINATED AFTER TOUCHDOWN. GROUNDED - YES. ENG 2 CONTROL STATUS MSG FOUND ACTIVE, PER IFIM TASK G73-20-00-810-858 FOUND 2 NON ACTIVE FAULTS. MX MSG 73-43304 COMPRESSOR DISCHARGE PRESSURE (PS3) SENSOR IS OUT OF RANGE DETECTED BY ENG-2
- [SDR ASAA2023101045542](https://openairdocs.org/sdr/ASAA2023101045542.md): Modulating Valve · out of range · Oct 10, 2023 · N977AK · Boeing 7379 · Pneumatic Distribution System
  > REFER TC 31-005-00 SMT MESSAGE BLEED FAMV RVDT R WITH ASSOCIATED CORRELATED MAINTENANCE MESSAGE 36-12031 ENGINE -2 FAMV RVDT SIGNAL IS OUT OF RANGE. GROUNDED - YES. (RESOLVED ON W/O: 1972725 TASKCARD: N/R-00002) THE RESISTANCE READINGS FOR ALL FIVE CONNECTION
- [SDR ASAA2023092445257](https://openairdocs.org/sdr/ASAA2023092445257.md): Insert · damaged · Sep 24, 2023 · N977AK · Boeing 7379 · Pneumatic System
  > #2 ENGINE HIGH PRESSURE SHUTOFF VALVE LOCKOUT INOP (HEILCOIL DAMAGE). GROUNDED - YES. CW EA MAX-36EA-25932 MAX HIGH PRESSURE SHUTOFF VALVE MANUAL LOCK HELICOIL INSERT INSHOP REPAIR. OK FOR SERVICE.
- [SDR ASAA2023092245267](https://openairdocs.org/sdr/ASAA2023092245267.md): Unknown · unknown · Sep 22, 2023 · N977AK · Boeing 7379 · Auto Flight System
  > F/C APPROACH SURVEY AUTOLAND NOT SUCCESSFUL. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023081044574](https://openairdocs.org/sdr/ASAA2023081044574.md): Unknown · unknown · Aug 10, 2023 · N977AK · Boeing 7379 · Engine Anti-Icing System
  > AFTER STARTING ENG NBR 1 WITH AIR CART NBR 1 ENG ANTI-ICE LIGHT ILLUMINATED. GROUNDED - YES. REF LOG PAGE 60841435 FOR CORRECTIVE ACTION. AFTER BLEED FAULT TROUBLESHOOTING ANTI ICE FAULT CLEARED. UPON OMF QUERY NOTICED HPSOV ON STATUS PAGE. ACCOMPLISHED EXISTI
- [SDR ASAA2023081044571](https://openairdocs.org/sdr/ASAA2023081044571.md): Unknown · unknown · Aug 10, 2023 · N977AK · Boeing 7379 · Pneumatic Distribution System
  > AFTER CROSS BLEED START ENG NBR 2 NBR 1 BLEED LIGHT ILLUMINATED. AT THE GATE AFTER SHUTDOWN MAINT LIGHT ILLUMINATED. GROUNDED - YES. UPON OMF QUERY NOTIED HPSOV ON STATUS PAGE. ACCOMPLISHED EXISTING FAULTS FOUND FAULT CODES 36-00180, 36-11020, 36-12030 AND 36-
- [SDR ASAA2023080944578](https://openairdocs.org/sdr/ASAA2023080944578.md): Computer · faulty · Aug 9, 2023 · N977AK · Boeing 7379 · Fuel Controlling System
  > GE DIAGNOSTICS REPORTS THE #2 ENGINE IS GENERATING ALERTS FOR PS3 OUT OF RANGE, PS3 PRESSURE DISAGREE FAULT, P3B OUT OF RANGE, P3B PRESSURE DISAGREE FAULT, OR P3B VS PS3 PRESSURE DISAGREE FAULT. GROUNDED - YES. REMOVED AND REPLACED PSS REF AMM 73-21-11, OPS CH
- [SDR ASAA2023080844496](https://openairdocs.org/sdr/ASAA2023080844496.md): Unknown · unknown · Aug 8, 2023 · N977AK · Boeing 7379 · Pneumatic Distribution System
  > WHILE ACCOMPLISHING T/C 31-005-00 FOUND FAULT CODE 36-00051 DUAL BLEED STATUS SIGNAL FROM ACAU-R DOES NOT AGREE WITH INTERNAL DUAL BLEED DETERMINATION LOGIC. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023080844483](https://openairdocs.org/sdr/ASAA2023080844483.md): Unknown · unknown · Aug 8, 2023 · N977AK · Boeing 7379 · Pneumatic Distribution System
  > WHILE ACCOMPLISHING T/C 35-005-00 FOUND #1 ENG FAULT CODE 36-12030 FAMV RVDT SIGNAL IS OUT OF RANGE. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023080744484](https://openairdocs.org/sdr/ASAA2023080744484.md): Unknown · unknown · Aug 7, 2023 · N977AK · Boeing 7379 · APU Bleed Air System
  > WITH APU PRESSURIZING PACKS, DUCT PRESSURE FLUCTUATES FROM 10 TO 35 PSI. GROUNDED - YES. ACCOMPLISHED ENG NORMAL START REF AMM 71-00-00 WITH APU BLEED AIR WITH NO FLUCTUATION NOTED APU OPS NORMAL THIS CLEAR MEL 49-52-01B SEA MOC NOTIFIED PLACARDS REMOVED.
- [SDR ASAA2023080444422](https://openairdocs.org/sdr/ASAA2023080444422.md): Unknown · unknown · Aug 4, 2023 · N977AK · Boeing 7379 · Fuel Controlling System
  > AMBER MAINT LIGHT ON OVERHEAD PANEL DOING PREFLIGHT. GROUNDED - YES. FOUND BOTH EEC FOR ENGINE 1 AND 2 IN TEST MODE FOLLOWED IFIM G77-00-00810-941, AND TASK G73-20-00-810-936. SET BOTH EECS TO NORM, CLEARED LATCHED FAULS, OPS CHECK GOOD.
- [SDR ASAA2023073144403](https://openairdocs.org/sdr/ASAA2023073144403.md): Unknown · unknown · Jul 31, 2023 · N977AK · Boeing 7379 · Engine Fuel and Control
  > WHILE PERFORMING T/C 31-005-00, FOUND ENG 2 EEC C1 MESSAGE WITH ASSOCIATED MAINTENANCE MESSAGE 73-43303 AND 73-43293. " COMPRESSOR DISCHARGE PRESSURE (PS3) SENSOR CHANNEL-A CHANNEL-B SIGNALS DO NOT AGREE. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023071644125](https://openairdocs.org/sdr/ASAA2023071644125.md): Unknown · unknown · Jul 16, 2023 · N977AK · Boeing 7379 · Fuel Controlling System
  > GE DIAGNOSTICS REPORTS THE #2 ENGINE IS GENERATING ALERTS FOR PS3 OUT OF RANGE, PS3 PRESSURE DISAGREE FAULT, P3B OUT OF RANGE, P3B PRESSURE DISAGREE FAULT, OR P3B VS PS3 PRESSURE DISAGREE FAULT. (TASK CARD 73-ASA-01)-----#PRI1/ETOPS----- CNR # 20230716004*****
- [SDR ASAA2023062643775](https://openairdocs.org/sdr/ASAA2023062643775.md): Filter · faulty · Jun 26, 2023 · N977AK · Boeing 7379 · Engine Oil Distribution (Airframe Furnished)
  > #1 ENGINE IS ALERTING FOR OIL FILTER DELTA PRESSURE INCREASE AND APPROACHING OIL FILTER BYPASS INDICATION. (#PRI1) CNR 20230626065DO NOT EXTEND. GROUNDED - YES. ACCOMPLISHED TSR STEPS 1 THRU 4.NO OMF MX MSG NOTED, NO DEFECTS OR CONTAMINATIONS NOTED ON OIL FILT
- [SDR ASAA2023062043659](https://openairdocs.org/sdr/ASAA2023062043659.md): Generator · faulty · Jun 20, 2023 · N977AK · Boeing 7379 · AC Generator-Alternator
  > APU FAULT AND SHUTDOWN ON GROUND AFTER LANDING. GROUNDED - YES. ACCOMPLISHED B737-9 IFIM TASK 49-40-00-810-818 STEPS A.-C.(5)(C) AND IFIM TASK 49-40-00-810-805 STEPS A.-C.(5)(C). NO DEBRIS ON MAGNETIC PLUG, APU ROTATES FREELY, WIRING CHECK OK. REPLACED STARTER
- [SDR ASAA2023050843174](https://openairdocs.org/sdr/ASAA2023050843174.md): Igniter · failed · May 8, 2023 · N977AK · Boeing 7379 · Spark Plug/Igniter
  > ATTEMPTED TO START ENGINE #2. #2 ENGINE FAILED TO START RIGHT IGNITION WAS SELECTED. GROUNDED - YES. REPLACED BOTH RIGHT AND LEFT IGNITERS. REF B737-9 AMM 74-21-02.
- [SDR ASAA2023050843170](https://openairdocs.org/sdr/ASAA2023050843170.md): Unknown · unknown · May 8, 2023 · N977AK · Boeing 7379 · Ice/Rain Protection System
  > AUX PITOT LIGHT ON OVERHEAD PANEL ILLUMINATED ON APPROACH. GROUNDED - YES. ACCOMPLISHED B737-9 IFIM 30-31-00-810-804 AUX PITOT LIGHT EXTINGUISHED. OPERATION AUX PITOT NORMAL.
- [SDR ASAA2023050243098](https://openairdocs.org/sdr/ASAA2023050243098.md): Unknown · unknown · May 2, 2023 · N977AK · Boeing 7379 · Windshield/Door Rain/Ice Removal
  > ON DEPARTURE CAPTAINS #2 OVERHEAT WINDOW LIGHT CAME ON. GROUNDED - YES. PERFORMED B737-9 IFIM TASK 30-41-00-810-830. CAPTAIN'S SIDE WINDOW OPS CK NORMAL. REF B737-9 AMM TASK 30-41-00-710-801.WAS AN INTERMITTENT FAULT. OK FOR SERVICE.NO HISTORY 30 DAYS.
- [SDR ASAA2023050243096](https://openairdocs.org/sdr/ASAA2023050243096.md): Unknown · unknown · May 2, 2023 · N977AK · Boeing 7379 · Pitot/Static Anti-Ice System
  > ON LANDING AUX PITOT LIGHT CAME ON. GROUNDED - YES. PERFORMED RESET PROCEDURE PER B737-9 IFIM TASK 30-31-00-810-804 OPS CHECKS NORMAL.
- [SDR ASAA2023032442571](https://openairdocs.org/sdr/ASAA2023032442571.md): Fmc · faulty · Mar 24, 2023 · N977AK · Boeing 7379 · Flight Management Computing Hardware System
  > TECH SERVICES REQUEST FOLLOW-UP TO HISTORY OF #1 (LEFT) FMC FAILED AND REBOOTING. REPLACE LEFT FMC. GROUNDED - YES. REMOVED AND REPLACED #1 (LEFT) FMC REF B737-9 AMM 34-61-02. OPS CHECK GOOD. NO FAULTS NOTED.
- [SDR ASAA2023032342569](https://openairdocs.org/sdr/ASAA2023032342569.md): Unknown · unknown · Mar 23, 2023 · N977AK · Boeing 7379 · Flight Management Computing Hardware System
  > AT CRUISE FL 340 FMC DID A RESTART. VTK ON CA ND AND BOTH FMC'S WENT TO MENU PAGE. A/T LIMIT LIGHT ILLUMINATED. FMC'S RETURNED TO NORMAL AFTER 15 SEC. GROUNDED - YES. PERFORMED FMC OPERATIONAL TEST. FMC LEFT AND RIGHT AND L AND R DPC TEST OK IAW B737-9 AMM TAS
- [SDR ASAA2023031642382](https://openairdocs.org/sdr/ASAA2023031642382.md): Unknown · unknown · Mar 16, 2023 · N977AK · Boeing 7379 · Flight Management Computing Hardware System
  > WHILE IN CRUISE @ FL340 VTK ON CAPTAINS ND ILLUMINATED FOLLOWED BY BOTH MCDU'S GOING BLANK (MENU) WITH A/T LIM ANNUNCIATION. CAPTAINS MAGENTA LINE ALSO DISAPPEARED ON CAPTAINS ND. ALL SYSTEMS RESTORED WITHIN 15 SECONDS BEFORE QRH COULD BE ACCOMPLISHED. GROUNDE
- [SDR ASAA2023030142184](https://openairdocs.org/sdr/ASAA2023030142184.md): Unknown · unknown · Mar 1, 2023 · N977AK · Boeing 7379 · Flight Management Computing Hardware System
  > FO NAV DISPLAY MAGEHTA ROUTE DATA INCORRECT AND WOULD NOT DISPLAY FMC DATA. MCP DATA DISPLAYED ON FO NAV DISPLAY. CA NAV DISPLAY CORRECT. NO FMC WARNINGS OR CAUTIONS. GROUNDED - YES. RELOAD FMC DATA PER B737-9 AMM 34-61-00-470-002.
- [SDR ASAA2023011041484](https://openairdocs.org/sdr/ASAA2023011041484.md): Fmc · faulted · Jan 10, 2023 · N977AK · Boeing 7379 · Flight Management Computing Hardware System
  > FMC DISAGREE ON GROUND, QRH PROCEDURE RESOLVED. OPS GOOD. GROUNDED - YES. PERFORMED B737-9 IFIM 34-61-00-810-918 AND FAULT MSG REMAINED EXTINGUISHED.
- [SDR ASAA2022121841193](https://openairdocs.org/sdr/ASAA2022121841193.md): Oil Cooler · cracked · Dec 18, 2022 · N977AK · Boeing 7379 · Engine Oil Cooler
  > FOUND CRACK ON #1 ENGINE SURFACE AIR OIL COOLER LH. GROUNDED - YES. REMOVED AND REPLACED #1 ENG SACOC REF B737-9 AMM 79-21-02.
- [SDR ASAA2022111740855](https://openairdocs.org/sdr/ASAA2022111740855.md): Anti-Ice Valve · not opened · Nov 17, 2022 · N977AK · Boeing 7379 · Airfoil Anti/De-ice System
  > LEFT WING ANTI ICE VALVE WOULD NOT OPEN WHEN TURNED ON LEFT VALVE CAUTION LIGHT ANT ANTI ICE VALVE MASTER CAUTION ILLUMINATED WHEN POSITION ON. GROUNDED - YES. REMOVED & REPLACED LH WING ANTI-ICE VALVE REF B737-9 AMM 30-11-11/401. OPS CHECK PASS.
- [SDR ASAA2022110140870](https://openairdocs.org/sdr/ASAA2022110140870.md): Sensor · faulted · Nov 1, 2022 · N977AK · Boeing 7379 · Power Indicating System
  > WHILE PERFORMING ASA T.C. #05-020-01, #1 ENG HAS SMT MTX MSG PRESENT "ENG 1 EEC C2", WITH CORRELATED MTX MSG 73-44632: FAN SPEED (N1) SENSOR LOW TOOTH SIGNAL IS INVALID, IN FAULT HISTORY. GROUNDED - YES. REPLACED N1 SENSOR, REF B737-9 AMM 77-12-01-401.
- [SDR ASAA2022102640525](https://openairdocs.org/sdr/ASAA2022102640525.md): Anti-Ice Valve · faulted · Oct 26, 2022 · N977AK · Boeing 7379 · Airfoil Anti/De-ice System
  > WHEN SELECTING WING ANTI-ICE, THE LEFT WING ANTI-ICE VALVE AMBER LIGHT REMAINED ILLUMINATED AND THERE WAS A 15 PSI DUCT SPLIT. GROUNDED - YES. REMOVED AND REPLACED LH WING ANTI-ICE VALVE REF B737-9 AMM 30-11-11 OPS CHK GOOD. GROUND VERIFICATION SUCCESSFUL. OR
- [SDR ASAA2022102440444](https://openairdocs.org/sdr/ASAA2022102440444.md): Anti-Ice Valve · false indication · Oct 24, 2022 · N977AK · Boeing 7379 · Airfoil Anti/De-ice System
  > DURING DESCENT WITH ANTI ICE ON, L VALVE AMBER LIGHT REMAINED ILLUMINATED. GROUNDED - YES. INTERROGATED FAULT HISTORY. FOUND NO FAULTS. PREFORMED B737-9 FIM TASK 30-11-00-810-808 FOR WING ANTI-ICE STAYS ON AFTER TRANSITION. VALVE AND PANEL OPERATIONAL CHECK GO
- [SDR ASAA2022102340442](https://openairdocs.org/sdr/ASAA2022102340442.md): Anti-Ice System · false indication · Oct 23, 2022 · N977AK · Boeing 7379 · Airfoil Anti/De-ice System
  > ON DESCENT WITH A TAT OF -3 WING WING ANTI-ICE WAS TURNED ON AND THE L VALVE CAUTION LIGHT REMAINED ILLUMINATED. CHECKLIST DIRECTED TO TURN OFF WING ANTI-ICE AND CAUTION LIGHT EXTINGUISHED. GROUNDED - YES. PREFORMED OPS CHECK REF B737-9 AMM 30-11-11-710-801 NO
- [SDR ASAA2022101340320](https://openairdocs.org/sdr/ASAA2022101340320.md): Wire · misinstalled · Oct 13, 2022 · N977AK · Boeing 7379 · Emergency Lighting
  > EMERGENCY EXIT LIGHTS "NOT ARMED" INDICATOR INOP. GROUNDED - YES. RELAMPED NO HELP. REPLACED L-1 "NOT ARMED" LIGHT ASSEMBLY AND SOCKET, NO HELP. PULLING C/B 96-3 D11 MASTER DIM/TEST CONT. WILL TURN ON LIGHT. REPLACED DIODE M208 REF B737-9 WDM 33-18-11 SH2. NO
- [SDR ASAA2022091339939](https://openairdocs.org/sdr/ASAA2022091339939.md): Unknown · unknown · Sep 13, 2022 · N977AK · Boeing 737 · Flight Management Computing Hardware System
  > FMC DISAGREE ON BOTH NDS. GROUNDED - YES. FAULT RESET AND CLEARED REF B737-9 IFIM TASK 34-61-00-810-919.
- [SDR ASAA2022071339073](https://openairdocs.org/sdr/ASAA2022071339073.md): Pressure Switch · faulty · Jul 13, 2022 · N977AK · Boeing 7379 · Engine Fuel Distribution
  > #1 ENG FILTER BYPASS LIGHT ON DEPARTURE. GROUNDED - YES. REMOVED AND REPLACED #1 ENG MAIN FUEL/OIL HEAT EXCHANGER DIFFERENTIAL PRESS SWITCH. REF B737-9 AMM 73-11-12-000-801-G00/-400-801-G00.
- [SDR ASAA2022071339056](https://openairdocs.org/sdr/ASAA2022071339056.md): Heat Exchanger · faulty · Jul 13, 2022 · N977AK · Boeing 7379 · Engine Fuel Distribution
  > TROUBLESHOOTING RECOMMENDATIONS FOR #1 ENGINE MAIN FUEL/OIL HEAT EXCHANGER FAULT. GROUNDED - YES. REMOVED AND REPLACED #1 ENG MAIN FUEL/OIL HEAT EXCHANGER DIFFERENTIAL PRESSURE SENSOR REF B737-9 AMM TASKS 73-11-12-000-801-G00/-400-801-G00. OPS CHECK GOOD.
- [SDR ASAA2022071239055](https://openairdocs.org/sdr/ASAA2022071239055.md): Fmu · damaged · Jul 12, 2022 · N977AK · Boeing 7379 · Fuel Controlling System
  > DURING INSPECTION OF #1 ENGINE FUEL METERING UNIT FOUND DAMAGE DURING REMOVAL OF FMU SOLENOID JUST FWRD OF SB2 STRAIN REF ASA L/P 60220674 REQ P/N 8062-1155. GROUNDED - YES. REPLACED FUEL METERING UNIT REF B737-9 AMM 73-21-04-400-801 STEPS A-H OPERATIONAL TEST

## 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 = 'N977AK' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N977AK/reports

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