# Service difficulty reports: N978AK

A list on [N978AK](https://openairdocs.org/aircraft/N978AK.md).

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

- [SDR ASAA2026052866385](https://openairdocs.org/sdr/ASAA2026052866385.md): Battery Pack · no test · May 28, 2026 · N978AK · Boeing 7379 · Emergency Lighting
  > L1 DOOR EMERGENCY LIGHT FAILED CAPACITY CHECK. SRXR430X. GROUNDED - YES. REMOVED AND REPLACED L1 DOOR EMERGENCY BATTERY PACK AND PERFORMED OPS/CHECK TESTED GOOD IAW B737 AMM 33-51-06-960-802. SRXR430X.
- [SDR ASAA2026052866384](https://openairdocs.org/sdr/ASAA2026052866384.md): Battery Pack · no test · May 28, 2026 · N978AK · Boeing 7379 · Emergency Lighting
  > RH SEAT ROWS 17, 19, AND 23 EMERGENCY CEILING LIGHT FAILED CAPACITY CHECK. SRXR430X. GROUNDED - YES. REMOVED AND REPLACED SEAT ROWS RH (17, 19, AND 23) EMERGENCY BATTERY PACK AND PERFORMED OPS/CHECK TESTED GOOD IAW B737 33-51-06-960-802. SRXR430X.
- [SDR ASAA2026052766383](https://openairdocs.org/sdr/ASAA2026052766383.md): Seat Track · damaged · May 27, 2026 · N978AK · Boeing 7379 · Fuselage, Seat/Cargo Attach Fittings
  > FIRST OFFICER SEAT INBOARD AFT SEAT TRACK HAS LOCK HOLES THAT ARE ELONGATED BEYOND LIMITS. SRXR430X. GROUNDED - YES. REMOVED AND REPLACED FIRST OFFICER SEAT INBOARD ALT SEAT TRACK IAW IPECO CMM 53-01-02 PAGE 303 STEP 3, A METHOD 1 AND PAGE 709 STEP 5, A,2,4 ME
- [SDR ASAA2026052766382](https://openairdocs.org/sdr/ASAA2026052766382.md): Seat Track · damaged · May 27, 2026 · N978AK · Boeing 7379 · Fuselage, Seat/Cargo Attach Fittings
  > CAPTAIN'S SEAT INBOARD AFT SEAT TRACK HAS LOCK HOLES THAT ARE ELONGATED BEYOND LIMITS. SRXR430X. GROUNDED - YES. REMOVED AND REPLACED CAPTAIN'S SEAT INBOARD AFT SEAT TRACK IAW IPECO CMM 53-01-02 PAGE 303 STEP 3, A METHOD 1 AND PAGE 709 STEP 5,A,2,4 METHOD 1. S
- [SDR ASAA2025051258099](https://openairdocs.org/sdr/ASAA2025051258099.md): Skin · corroded · May 12, 2025 · N978AK · Boeing 7379 · Fuselage Main, Plate/Skin
  > LOWER FUSELUGE SKIN JUST FWD OF STA 400, FWD SIDE OF DRAIN PLUG SKIN HAS CORROSION MARKED. GROUNDED - YES. REMOVED DAMAGE AND CHECKED LIMITS ORI MAT.080, REMOVED MAT.001, REMAINING.079 FOUND TO BE WITHIN LIMITS IAW B737-MAX9 SRM 53-30-01-01-1, SRM 53-00- 01
- [SDR ASAA2023102945876](https://openairdocs.org/sdr/ASAA2023102945876.md): Unknown · unknown · Oct 29, 2023 · N978AK · Boeing 7379 · Engine Controls
  > FOUND ENG 1 EEC C1 LATCHED MESSAGE DURING TC 31-005-00. GROUNDED - YES. FOUND CORRELATED MESSAGE 73-44141. PERFORMED IFIM G73-20-00-810-847 FAULT IS INTERMITTENT. LATCHED MESSAGE ERASED.
- [SDR ASAA2023102945875](https://openairdocs.org/sdr/ASAA2023102945875.md): Unknown · unknown · Oct 29, 2023 · N978AK · Boeing 7379 · Fuel Controlling System
  > FOUND ENG 2 EEC C2 LATCHED MESSAGE DURING TC 31-005-00. GROUNDED - YES. FOUND NO CORRELATED FAULTS TO ENG 2 EEC C2 LATCHED MESSAGE PERFORMED ENG IDLE TEST IAW IFIM G73-10-00-810-804. NO DEFECTS NOTED. LATCHED MESSAGE ERASED.
- [SDR ASAA2023101245591](https://openairdocs.org/sdr/ASAA2023101245591.md): Unknown · unknown · Oct 12, 2023 · N978AK · Boeing 7379 · Fuel Controlling System
  > FAULT CODE: ENG 1 EEC C1 ( 732-451-51) FOUND DURING SCHEDULE MTX TASK DISPLAY SYSTEM. GROUNDED - YES. ACCOMPLISHED IFIM TASK G73-20-00-810-855, FAULT CLEARED AND TEST N0. 32 PASSED AND FAULT DID NOT RETURN UNDER SMT MESSAGES.
- [SDR ASAA2023100845474](https://openairdocs.org/sdr/ASAA2023100845474.md): Igniter · faulty · Oct 8, 2023 · N978AK · Boeing 7379 · Spark Plug/Igniter
  > NO 1 ENG DID NOT START WHEN RIGHT IGN SELECTED. GROUNDED - YES. (RESOLVED ON W/O: 1972059 TASKCARD: N/R-00003) REMOVED AND REPLACED #1 ENG. RH IGNITER PER AMM 74-21-02 OPEN AND CLOSED FAN COWL PANALS PER AMM 71-11-04 OPENED AND CLOSED THRUST REVERSER PER AMM
- [SDR ASAA2023092145231](https://openairdocs.org/sdr/ASAA2023092145231.md): Unknown · unknown · Sep 21, 2023 · N978AK · Boeing 7379 · Ignition System
  > ABORTED #1 ENG START. NEGATIVE LIGHT OFF. GROUNDED - YES. (RESOLVED ON W/O: 1968805 TASKCARD: N/R-00014) REVERSED MEL CONFIGURATION CHANGES. ACCOMPLISHED IFIM G74-00-00-810-839 AND EEC CHANNEL A IGNITION SYSTEM TEST PPER AMM G71-00-00-730-804-G00. TEST PASSED
- [SDR ASAA2023091145081](https://openairdocs.org/sdr/ASAA2023091145081.md): Unknown · unknown · Sep 11, 2023 · N978AK · Boeing 7379 · APU Start/Ignition System
  > APU FAULT ON TAXI IN. LIGHT CLEARED WHEN APU SWITCH TURNED OFF. GROUNDED - YES. (RESOLVED ON W/O: 1969292 TASKCARD: N/R-00001) PERFORMED INITIAL EVALUATION OF IFIM 49-41254. FAULT INITIALLY SHOWED ACTIVE THEN CLEARED. STARTED APU MULTIPLE TIMES WITH NO DEFECT
- [SDR ASAA2023090845251](https://openairdocs.org/sdr/ASAA2023090845251.md): Fuel Nozzle · coked · Sep 8, 2023 · N978AK · Boeing 7379 · Fuel Injector Nozzle
  > GE DIAGNOSTICS REPORTS #1 ENGINE TREND DATA SHOWS EXCESS COKING OF THE FUEL NOZZLE MAIN ORIFICES. (#PRI3/ETOPS) (FULL SET FUEL NOZZLE REPLACEMENT)NO EXTENSION ALLOWED (150 CYCLES).CNR 20230907074. GROUNDED - YES. (RESOLVED ON W/O: 1968805 TASKCARD: N/R-00001)
- [SDR ASAA2023090244896](https://openairdocs.org/sdr/ASAA2023090244896.md): Unknown · faulty · Sep 2, 2023 · N978AK · Boeing 7379 · Central Warning
  > "MAINT" ILLUMINATED AFTER LANDING EXTINGUISHED ON TAXI IN. GROUNDED - YES. VERIFIED FAULT, NO STATUS MSG, FAULT HISTORY SHOWS INTER MSG 32-62101, SEE LAST 4 L/P'S FOR HISTORY KW 80780 09/02/2023, REMOVED & REPLACED NEW AUTO THROTTLE SWITCH PACK M1766, PERFORME
- [SDR ASAA2023090144926](https://openairdocs.org/sdr/ASAA2023090144926.md): Unknown · unknown · Sep 1, 2023 · N978AK · Boeing 7379 · Engine Controls
  > AFTER TOUCHDOWN "MAINT" LIGHT OVERHEAD PANEL ILLUMINATED. LIGHT WENT OUT AFTER ENGINE SHUTDOWN. GROUNDED - YES. PFM'D FAULT INTERRIGATION FOR MX MSG. FOUND NO ACTIVE FAULTS. FOUND FAULT MSG 32-62101 (PSEU LEFT TRA LT44 SWITCH IS OPEN DURING LANDING) NOT ACTIVE
- [SDR ASAA2023083144924](https://openairdocs.org/sdr/ASAA2023083144924.md): Unknown · unknown · Aug 31, 2023 · N978AK · Boeing 7379 · Engine Controls
  > MAINT LIGHT ILLUMINATED AFTER LANDING. GROUNDED - YES. FOUND FAULT "32-62101 LEFT AUTOTHROTTLE MICROSW ASSEMBLY LT44" PERFORMED IFIM 32-09-00-810-839 PERFORMED PSEU LRU REPLACEMENT TEST. ALL REQUIRED TESTS PASSED FAULT WAS INTERMITTENT. NO HISTORY LAST 30 DAYS
- [SDR ASAA2023071144003](https://openairdocs.org/sdr/ASAA2023071144003.md): Unknown · unknown · Jul 11, 2023 · N978AK · Boeing 7379 · Air Conditioning System
  > AMBER MAINT LIGHT OVERHEAD PANEL ILLUMINATED - DISCOVERED DURING PREFLIGHT. GROUNDED - YES. PACK FLOW PRIMARY R - ON STATUS MSG 21-59001 IS ACTIVE. FOUND P6-4 C/B B-11 PACK CONT RIGHT A/C "OUT" INSPECTED + RESET C/B REF MM 20-60-01 + IT STAYS IN. (DUE TO LOCAT
- [SDR ASAA2023062443809](https://openairdocs.org/sdr/ASAA2023062443809.md): Unknown · unknown · Jun 24, 2023 · N978AK · Boeing 7379 · Engine Fuel Distribution
  > GE DIAGNOSTICS REPORTS #2 ENGINE TREND DATA SHOWS EXCESS COKING OF THE FUEL NOZZLE MAIN ORIFICES. (FULL SET FUEL NOZZLE REPLACEMENT) NO EXTENSION ALLOWED (150 CYCLES). GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023060543491](https://openairdocs.org/sdr/ASAA2023060543491.md): Exciter · faulty · Jun 5, 2023 · N978AK · Boeing 7379 · Ignition System
  > NEGATIVE IGNITION ON #2 ENGINE START. VERY LOW FUEL FLOW WHEN START LEVER RAISED TO IDLE (.26) THEN WENT TO ZERO. GROUNDED - YES. REMOVED AND REPLACED R IGNTION EXCITER IAW B737-9 AMM 74-11-01-400-02-GOO REMOVED AND REPLACED R IGNITER PLUG IAW AMM 74-21-02/401
- [SDR ASAA2023060143434](https://openairdocs.org/sdr/ASAA2023060143434.md): Transceiver · failed · Jun 1, 2023 · N978AK · Boeing 7379 · HF Communications System
  > HF#2 SHOWS FAIL IN BOTH WINDOWS. GROUNDED - YES. NO ACTIVE FAULT ONS SHOWS 23-21042 INTERNAL FAULT. REMOVED AND REPLACED HF #2 R/T REF B737-9 AMM 23-11-21-000/400-801. GROUND VERIFICATION PASS.
- [SDR ASAA2023041942950](https://openairdocs.org/sdr/ASAA2023041942950.md): Unknown · unknown · Apr 19, 2023 · N978AK · Boeing 7379 · Pneumatic Distribution System
  > AFTER LANDING, OVERHEAD MAINT LIGHT ILLUMINATED. GROUNDED - YES. STATUS PAGE SHOWS FAMV R. RUN IAM B737-9 FIM TASK 36-12-00-801-802. NO RELATED FAULT, RUN B737-9 AMM TEST FAMV R TEST OK, REF 36-12-00.
- [SDR ASAA2023041942949](https://openairdocs.org/sdr/ASAA2023041942949.md): Modulating Valve · faulted · Apr 19, 2023 · N978AK · Boeing 7379 · Pneumatic Distribution System
  > AFTER LANDING, AMBER MAINT LIGHT ON OVERHEAD PANEL ILLUMINATED. GROUNDED - YES. REPLACED #2 FAN AIR MODULATING VALVE REF B737-9 AMM 36-12-03.
- [SDR ASAA2023041942932](https://openairdocs.org/sdr/ASAA2023041942932.md): Unknown · unknown · Apr 19, 2023 · N978AK · Boeing 7379 · Pneumatic System
  > ON TAXI IN THE OVERHEAD PANEL "MAINT" ANNUCIATOR ILLUMINATED. GROUNDED - YES. #2 ENGINE FAMV MGS 36-12021, ACCOMPLISHED B737-9 IFIM TASK 36-12-00-810-802 MSG CLEARED AFTER PNEUMATIC SYSTEM TEST, NO HISTORY PAST 90 DAYS.
- [SDR ASAA2023040442718](https://openairdocs.org/sdr/ASAA2023040442718.md): Unknown · unknown · Apr 4, 2023 · N978AK · Boeing 7379 · Turbine Engine Air Inlet Section
  > WHILE PERFORMING LL1 INSPECTION FOUND NICK ON #2 ENG BLADE #5 LEADING EDGE APPROXIMATLEY 5.5 INCHES FROM END OF BLADE. GROUNDED - YES. NICK ON #5 BLADE MEASURES 0.2 INCHES LENGTH BY 0.032 INCHES DEEP NICK IS BEYOND SERVICABLE LIMIT OF 0.0137 INCHES PER B737-9
- [SDR ASAA2023032342580](https://openairdocs.org/sdr/ASAA2023032342580.md): Unknown · unknown · Mar 23, 2023 · N978AK · Boeing 7379 · APU Start/Ignition System
  > GOT FAULT LIGHT WHEN ATTEMPTING TO START APU ON LANDING. GROUNDED - YES. INTERATED FAULT HISTORY FOUND 49-41254, REF B737-9 IFIM 49-40-00-810-818, RESTARTED APU 2 TIMES OPS GOOD AFTER NO FAULTS IN STATUS ACTIVE OR NOT ACTIVE.
- [SDR ASAA2023031042288](https://openairdocs.org/sdr/ASAA2023031042288.md): Unknown · unknown · Mar 10, 2023 · N978AK · Boeing 7379 · Cabin Temperature Control System
  > "MAINT" LIGHT ILLUMINATED ON OVERHEAD PANEL. GROUNDED - YES. INTERROGATED OMF, FOUND FAULT MESSAGE FOR CONT CAB VLV. PERFORMED SYSTEM TEST PER B737-9 IFIM 21-61-00-810. OPS GOOD. FAULT CLEARED.
- [SDR ASAA2023022842122](https://openairdocs.org/sdr/ASAA2023022842122.md): Pump · leaking · Feb 28, 2023 · N978AK · Boeing 7379 · Engine Fuel Distribution
  > ON TAXI IN #1 ENGINE STREAMING FUEL FROM FWD DRAIN MAST. GROUNDED - YES. IDLED #1 ENGINE FOUND FUEL STREAMING OUT OF FUEL PUMP PAD DRAIN - OUT OF LIMITS. REMOVED AND REPLACED #1 ENG MAIN FUEL PUMP REF B737-9 AMM 73-11-01-000-801-G00 AND AMM 73-11-01-400-801-G0
- [SDR ASAA2023022342051](https://openairdocs.org/sdr/ASAA2023022342051.md): Unknown · unknown · Feb 23, 2023 · N978AK · Boeing 7379 · Ignition Power Supply
  > OVERHEAD "MAINT" LIGHT ILLUMINATED. GROUNDED - YES. FOUND STATUS MSG "ENG 2 IGNITER L". REF B737-9 IFIM G74-20-00-810-802 STEPS A, (6), (7), ERASED FAULT AND PERFORMED CHANNELS A & B IGNITION SYS TEST, PASSED BOTH CHANNELS. MAINT LIGHT EXTINGUISHED.
- [SDR ASAA2023021341930](https://openairdocs.org/sdr/ASAA2023021341930.md): Unknown · unknown · Feb 13, 2023 · N978AK · Boeing 7379 · Turbine Engine Air Inlet Section
  > AMBER "MAINT "LIGHT. GROUNDED - YES. PERFORMED FAULT INTEGRATION IAW B737-9 AMM 31-69-00-750-801 FOUND INACTIVE MAINTENANCE MESSAGE 73-45001 AND 73-45031 PERFORMED B737-9 IFIM G73-00-00-810-A78 CONFIRMED FAULTS WERE INTERMITTENT. ERASED LATCHED MESSAGES AS RE
- [SDR ASAA2023010941466](https://openairdocs.org/sdr/ASAA2023010941466.md): Computer · faulted · Jan 9, 2023 · N978AK · Boeing 7379 · Autopilot System
  > WHILE CONDUCTING LLM TRAINING DISCOVERED A/T BITE TEST INOP. UNABLE TO ACCESS DFCS BITE EITHER. SUSPECT FCC A NOT RESPONDING. GROUNDED - YES. REMOVED FCC A PER B737-9 AMM TASK 22-11-33-000-801.INSTALLED FCC A. PERFORMED GOOD INSTALLATION TEST. ACCOMPLISHED ALL
- [SDR ASAA2023010341403](https://openairdocs.org/sdr/ASAA2023010341403.md): A/C Pack · faulted · Jan 3, 2023 · N978AK · Boeing 7379 · Cabin Cooling System
  > L PACK LIGHT ULLUMINATED AT LEVEL FLIGHT. FL350. ACCOMPLISHED QRH PROCEDURE, PACK LIGHT REMAINED ILLUMINATED. GROUNDED - YES. FOUND MX MESSAGE 21.55100-21-55030. RESET PER B737-9 FIM 21-51-00-810-807. MESSAGE CLEARED AND LH PACK REMAINS EXTINGUISHED.
- [SDR ASAA2023010141347](https://openairdocs.org/sdr/ASAA2023010141347.md): Fmc · faulted · Jan 1, 2023 · N978AK · Boeing 7379 · Flight Management Computing Hardware System
  > PILOTS OBSERVED MOMENTARY FMC-L FAILURE AND SELF RECOVERY IN CRUISE FLIGHT. GROUNDED - YES. PERFORMED OPERATIONAL TEST OF THE L-FMC SYSTEM IAW B737-9 AMM 34-61-00. OPS TEST GOOD, NO DEFECTS NOTED.
- [SDR ASAA2023010141325](https://openairdocs.org/sdr/ASAA2023010141325.md): Warning Message · false activation · Jan 1, 2023 · N978AK · Boeing 7379 · Cabin Cooling System
  > LEFT PACK ILLUMINATED AT CRUISE. RAN QRH DID NOT EXTINGUISH. GROUNDED - YES. ACCOMPLISHED B737-9 IFIM 21-51-00-810-807 FOR LATCHED FAULT 21-55030. FAULT RESET, LATCHED MSG NO LONGER DISPLAYED. LEFT PACK LIGHT EXTINGUISHED.
- [SDR ASAA2022121941195](https://openairdocs.org/sdr/ASAA2022121941195.md): Anti-Ice Valve · fault message · Dec 19, 2022 · N978AK · Boeing 7379 · Airfoil Anti/De-ice System
  > RIGHT WING ANTI-ICE VALVE CAUTION. IN-FLIGHT. GROUNDED - YES. PERFORMED OPS TEST PER B737-9 AMM 30-11-11-710-801,OPS CHECK GOOD BUT DUE TO HISTORY MX CONTROL REQUEST ANTI-ICE VALVE CHANGE. REMOVED AND REPLACED R/H WING THERMAL ANTI-ICE VALVE REF TO AMM 30-11-1
- [SDR ASAA2022112440941](https://openairdocs.org/sdr/ASAA2022112440941.md): Warning Message · false indication · Nov 24, 2022 · N978AK · Boeing 7379 · Flight Management Computing Hardware System
  > FMC DISAGREE QRH PROCEDURE PERFORMED. GROUNDED - YES. FMC DISAGREE MESSAGE NO LONGER DISPLAYED.
- [SDR ASAA2022102340410](https://openairdocs.org/sdr/ASAA2022102340410.md): Trim System · fault message · Oct 23, 2022 · N978AK · Boeing 7379 · Autopilot Computer
  > ON RECALL SPEED TRIM FAIL LIGHT ILLUMINATED LIGHT WENT OUT WHEN MASTER CAUTION WAS RESET. GROUNDED - YES. FOUND NO DFCS CURRENT STATUS RELATED FAULTS FOR CH A OR B. PERFORMED " SPEED STAB TRIM " TEST # 60.32. CH A AND B- NO FAULTS ALL TEST PASS. REF B737-9 IFI
- [SDR ASAA2022100240168](https://openairdocs.org/sdr/ASAA2022100240168.md): Sensor · intermittent · Oct 2, 2022 · N978AK · Boeing 7379 · Engine Indicating System
  > WHILE ACCOMPLISHING ASA TASK CARD 05-020-01, FOUND FAULT 73-43855, "ENGINE FAN INLET (T12) TEMPERATURE SENSOR & CALCULATED ADIRU AIR TEMPERATURE SIGNALS DO NOT AGREE" FOR ENG 2. GROUNDED - YES. PERFORMED IFIM G73-20-00-810-830 FOR FAULT 73-43855. NO FAULTS FO
- [SDR ASAA2022100240167](https://openairdocs.org/sdr/ASAA2022100240167.md): Sensor · intermittent · Oct 2, 2022 · N978AK · Boeing 7379 · Engine Indicating System
  > WHILE ACCOMPLISHING AS TASK CARD 05-020-01, FOUND FAULT 73-43850, "ENGINE FAN INLET (T12) TEMPERATURE SENSOR & CALCULATED ADIRU AIR TEMPERATURE SIGNALS DO NOT AGREE" FOR ENG 1. GROUNDED - YES. ACCOMPLISHED B737-9 FIM TASK 673-21-00-810-937, MAINTENANCE MESSAG
- [SDR ASAA2022082839682](https://openairdocs.org/sdr/ASAA2022082839682.md): Mcu · unresponsive · Aug 28, 2022 · N978AK · Boeing 7379 · Flight Management Computing Hardware System
  > CAPTAINS MCDU BLANKED OUT SEVERAL TIMES IN FLIGHT THEN BECAME UNRESPONSIVE. GROUNDED - YES. REMOVED AND REPLACED CAPT MCDU REF B737-9 AMM 34-61-01.
- [SDR ASAA2022072639231](https://openairdocs.org/sdr/ASAA2022072639231.md): Engine · smoke · Jul 26, 2022 · N978AK · Boeing 7379 · Turbine Engine Air Inlet Section
  > GROUND CREW REPORTED SMOKE COMING FROM FRONT OF # 2 ENGINE Q6TR841X. GROUNDED - YES. OPENED ENGINE # 2 FAN COWLS REF B737-9 AMM 71-11-04 AND PERFOMED GVI OF ENGINE NO DEFECTS NOTED, CREW RAN ENGINE OPS CHECK NORMAL FAN COWLS CLOSED REF AMM 71-11-04.
- [SDR ASAA2022072339194](https://openairdocs.org/sdr/ASAA2022072339194.md): Cap · open · Jul 23, 2022 · N978AK · Boeing 7379 · Engine Oil Storage (Airframe Furnished)
  > LARGE PUDDLE OF OIL DISCOVERED UNDERNEATH ENGINE #2 DURING PREFLIGHT. GROUNDED - YES. PERFORMED INSPECTION FOR OIL LEAK ON #2 ENG. FOUND CAP ON OIL TANK OPEN. SECURED CAP AND CLEANED ESIDU FROM AREA. B737-9 AMM 71-71-00-200-801-F00. OIL QTY IS WITH IN LIMITS P

## 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 = 'N978AK' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N978AK/reports

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