# N973AK: 2021 Boeing 737-9

- Status: Valid registration
- Airframe: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (registry code 138469A, 48 seats)
- Engine: [CFM International LEAP-1B28 series](https://openairdocs.org/engine/cfm-international-leap-1b28-series) (registry code 13120)
- Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE) (The Boeing Company), [TCDS E00088EN](https://openairdocs.org/tcds/E00088EN) (CFM International S.A.) (OpenAirDocs)
- Serial number: 43346
- Year built: 2021
- Type: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: February 8, 2022
- Certificate issued: March 30, 2022
- Expires: March 31, 2029
- Mode S code: AD8ED4
- Registered owner: [Alaska Airlines Inc](https://openairdocs.org/faa-owner/ALASKA%20AIRLINES%20INC)
- Location: [Seattle, WA](https://openairdocs.org/faa-place/WA/Seattle)
- Owner type: Corporation
- Owner's area on the map: 47.4466° N, 122.2721° W: Placed by OpenAirDocs at the center of ZIP code 98188, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=973AK
- Page: https://openairdocs.org/aircraft/N973AK

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every CFM International LEAP-1B28 model are included.

## ADs that may apply (OpenAirDocs): 48 in force

### Matched by airframe (Boeing 737-9)

- [AD 2026-18-07](https://openairdocs.org/ad/2026-18-07): Fuselage · Boeing 737-8, 737-9 and 737-8200. Effective Oct 22, 2026
- [AD 2026-15-11](https://openairdocs.org/ad/2026-15-11): Fuselage · Boeing 737-8, 737-9 and 737-8200. Effective Sep 10, 2026
- [AD 2026-14-11](https://openairdocs.org/ad/2026-14-11): Air Conditioning · Boeing 737-8, 737-9 and 737-8200. Effective Jul 13, 2026
- [AD 2026-13-17](https://openairdocs.org/ad/2026-13-17): Navigation · Boeing 737-8, 737-9 and 737-8200. Effective Jul 1, 2026
- [AD 2026-13-02](https://openairdocs.org/ad/2026-13-02): Navigation · Airbus Canada Limited Partnership 18, 49-46, 80-A and 555 more. Effective Jul 1, 2026
- [AD 2025-25-04](https://openairdocs.org/ad/2025-25-04): Equipment/furnishings · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 6 more. Effective Jan 16, 2026
- [AD 2025-02-07](https://openairdocs.org/ad/2025-02-07): Navigation · Modification of Rockwell Collins, Inc. Multi-Mode Receiver (STC ST01883WI or 4 others). Effective Mar 17, 2025
- [AD 2024-23-11](https://openairdocs.org/ad/2024-23-11): Flight controls · Boeing 737-8, 737-9 and 737-8200. Effective Jan 6, 2025
- [AD 2024-19-06](https://openairdocs.org/ad/2024-19-06): Ice/Rain Protection System · Boeing 737-8 and 737-9. Effective Nov 26, 2024
- [AD 2024-13-02](https://openairdocs.org/ad/2024-13-02): Oxygen · Boeing 737-8, 737-9, 737-8200 and 3 more. Effective Jul 25, 2024
- [AD 2024-06-03](https://openairdocs.org/ad/2024-06-03): Electrical Power · Boeing 737-8 and 737-9. Effective May 22, 2024
- [AD 2024-03-04](https://openairdocs.org/ad/2024-03-04): Flight controls · Boeing 737-8, 737-9 and 737-8200. Effective Feb 12, 2024
- [AD 2024-02-51](https://openairdocs.org/ad/2024-02-51): Doors · Boeing 737-9. Effective Jan 18, 2024
- [AD 2023-15-05](https://openairdocs.org/ad/2023-15-05): Ice and Rain Protection, Powerplant · Boeing 737-8, 737-9 and 737-8200. Effective Aug 25, 2023
- [AD 2023-12-11](https://openairdocs.org/ad/2023-12-11): Navigation · Boeing 737-8, 737-9 and 737-8200. Effective Jun 21, 2023
- [AD 2023-10-02](https://openairdocs.org/ad/2023-10-02): Indicating/Recording System, Navigation · Boeing 18, 23, 35 and 1,060 more. Effective May 26, 2023
- [AD 2023-05-06](https://openairdocs.org/ad/2023-05-06): Fuel · Boeing 737-8, 737-9 and 737-8200. Effective May 10, 2023
- [AD 2023-04-17](https://openairdocs.org/ad/2023-04-17): Fuel · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 5 more. Effective May 1, 2023
- [AD 2023-06-10](https://openairdocs.org/ad/2023-06-10): Ice and Rain Protection, Powerplant · Boeing 737-8, 737-8200 and 737-9. Effective Apr 11, 2023
- [AD 2022-24-09](https://openairdocs.org/ad/2022-24-09): Air conditioning · Boeing 737-100 Series, 737-200 Series, 737-200C Series and 12 more. Effective Jan 26, 2023
- [AD 2022-06-06](https://openairdocs.org/ad/2022-06-06): Flight controls · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 5 more. Effective Jun 16, 2022
- [AD 2021-19-19](https://openairdocs.org/ad/2021-19-19): Wings · Boeing 737-9. Effective Dec 8, 2021
- [AD 2021-13-18](https://openairdocs.org/ad/2021-13-18): Powerplant · Boeing 737-8, 737-8200 and 737-9. Effective Sep 3, 2021
- [AD 2021-16-15](https://openairdocs.org/ad/2021-16-15): Air conditioning · Boeing 737-8, 737-800 Series, 737-8200 and 2 more. Effective Aug 9, 2021
- [AD 2021-12-13](https://openairdocs.org/ad/2021-12-13): Fuel · Boeing 737-8 and 737-9. Effective Jul 29, 2021
- [AD 2021-10-07](https://openairdocs.org/ad/2021-10-07): Autoflight, Flight controls · Boeing 737-8 and 737-9. Effective Jul 8, 2021
- [AD 2021-08-04](https://openairdocs.org/ad/2021-08-04): Oxygen · Boeing 737-200 Series, 737-300 Series, 737-400 Series and 23 more. Effective May 26, 2021
- [AD 2021-09-08](https://openairdocs.org/ad/2021-09-08): Electrical power system · Boeing 737-8 and 737-9. Effective Apr 30, 2021
- [AD 2021-01-04](https://openairdocs.org/ad/2021-01-04): Doors · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 5 more. Effective Mar 29, 2021
- [AD 2020-24-02](https://openairdocs.org/ad/2020-24-02): Auto flight, Flight controls, and Indicating/recording systems · Boeing 737-8 and 737-9. Effective Nov 20, 2020
- [AD 2020-21-02](https://openairdocs.org/ad/2020-21-02): Fire protection · Airbus Canada Limited Partnership BD-500-1A10, BD-500-1A11, A330-201 and 45 more. Effective Nov 19, 2020
- [AD 2020-11-12](https://openairdocs.org/ad/2020-11-12): Nacelles/pylons · Boeing 737-8 and 737-9. Effective Jul 30, 2020
- [AD 2020-14-09](https://openairdocs.org/ad/2020-14-09): Fuel storage · Boeing 737-8 and 737-9. Effective Jul 15, 2020
- [AD 2020-03-10](https://openairdocs.org/ad/2020-03-10): Fuselage · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 5 more. Effective Mar 27, 2020
- [AD 2019-18-03](https://openairdocs.org/ad/2019-18-03): Exhaust · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 5 more. Effective Oct 3, 2019
- [AD 2019-14-12](https://openairdocs.org/ad/2019-14-12): Flight Controls · Boeing 737-8 and 737-9. Effective Aug 30, 2019
- [AD 2019-14-02](https://openairdocs.org/ad/2019-14-02): Hydraulic power · Boeing 737-100 Series, 737-200 Series, 737-200C Series and 11 more. Effective Aug 27, 2019
- [AD 2018-23-12](https://openairdocs.org/ad/2018-23-12): Equipment/furnishings · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 180 more. Effective Dec 28, 2018
- [AD 2018-20-13](https://openairdocs.org/ad/2018-20-13): Fuel · Boeing 757-200 Series, 757-200CB Series, 757-200PF Series and 13 more. Effective Nov 15, 2018

### Matched by engine (CFM International LEAP-1B28 series)

- [AD 2025-14-08](https://openairdocs.org/ad/2025-14-08): Turbine Section · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Aug 25, 2025
- [AD 2025-04-12](https://openairdocs.org/ad/2025-04-12): Turbine Section · CFM International LEAP-1A23, LEAP-1A24, LEAP-1A24E1 and 24 more. Effective Apr 8, 2025
- [AD 2024-25-02](https://openairdocs.org/ad/2024-25-02): Turbine Engine Compressor Section · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Feb 12, 2025
- [AD 2023-07-11](https://openairdocs.org/ad/2023-07-11): Turbine Engine Compressor Section · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Jun 13, 2023
- [AD 2022-17-02](https://openairdocs.org/ad/2022-17-02): Turbine Engine Accessory Drive · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Oct 20, 2022
- [AD 2022-11-02](https://openairdocs.org/ad/2022-11-02): Turbine Engine Compressor Section, Turbine Section · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Jul 8, 2022
- [AD 2021-10-06](https://openairdocs.org/ad/2021-10-06): Engine Controls · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective May 10, 2021
- [AD 2020-06-01](https://openairdocs.org/ad/2020-06-01): Turbine/Turboprop · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Apr 16, 2020
- [AD 2018-20-01](https://openairdocs.org/ad/2018-20-01): Turbine Section · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Dec 17, 2018

### Historical (superseded or no longer in force)

- [AD 2026-13-05](https://openairdocs.org/ad/2026-13-05) (historical): Air conditioning · Boeing 737-8, 737-9 and 737-8200. Effective Jul 16, 2026
- [AD 2026-04-05](https://openairdocs.org/ad/2026-04-05) (historical): Electrical Power · Boeing 737-8, 737-9 and 737-8200. Effective Feb 24, 2026
- [AD 2023-09-04](https://openairdocs.org/ad/2023-09-04) (historical): Equipment/furnishings · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 5 more. Effective Jun 29, 2023
- [AD 2022-03-20](https://openairdocs.org/ad/2022-03-20) (historical): Navigation · Boeing 737-8, 737-9 and 737-8200. Effective Jan 31, 2022
- [AD 2021-14-20](https://openairdocs.org/ad/2021-14-20) (historical): Cabin Altitude Pressure Switches · Boeing 737-100 Series, 737-200 Series, 737-200C Series and 12 more. Effective Jul 20, 2021
- [AD 2020-03-20](https://openairdocs.org/ad/2020-03-20) (historical): Navigation · Modification of Rockwell Collins, Inc. Multi-Mode Receiver (STC ST01883WI or 4 others). Effective Feb 18, 2020
- [AD 2018-23-51](https://openairdocs.org/ad/2018-23-51) (historical): Flight controls · Boeing 737-8 and 737-9. Effective Dec 21, 2018
- [AD 2023-23-12](https://openairdocs.org/ad/2023-23-12) (historical): Turbine Section · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Jan 16, 2024
- [AD 2019-12-01](https://openairdocs.org/ad/2019-12-01) (historical): Turbine Engine Accessory Drive · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Jul 3, 2019
- [AD 2018-25-09](https://openairdocs.org/ad/2018-25-09) (historical): Engine Controls · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Dec 26, 2018

## Information bulletins (advisory) (4 in force)

- [SAIB 2026-17](https://openairdocs.org/saib/2026-17): VNAV Approach Disconnect Following Missed Approach, Anomaly on Airplanes with FMC U14.0/14.1. Issued Oct 3, 2026
- [SAIB NM-20-02](https://openairdocs.org/saib/NM-20-02): Fire Protection. Issued Mar 11, 2020
- [SAIB NE-19-03](https://openairdocs.org/saib/NE-19-03): Escape Slide Maintenance Tasks and Intervals - JASC 2565. Issued Feb 19, 2019
- [SAIB NM-18-33](https://openairdocs.org/saib/NM-18-33): Engine Fuel and Control. Issued Dec 17, 2018

## NTSB investigations

None matched to N973AK.

## FAA accident and incident reports

None matched to N973AK.

## Service difficulty reports (62, newest 50)

As reported by operators and repair stations. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR ASAA2026010463657](https://openairdocs.org/sdr/ASAA2026010463657), Jan 4, 2026: SEAT TRACK. DAMAGED. FIRST OFFICER'S SEAT AFT INBOARD SEAT TRACK HAS ELONGATED HOLES BEYOND LIMITS. GROUNDED - YES. REMOVED AND REPLACED NEW SEAT TRACK AT FIRST OFFICER SEAT AFT INB
- [SDR ASAA2026010463656](https://openairdocs.org/sdr/ASAA2026010463656), Jan 4, 2026: SEAT TRACK. DAMAGED. CAPTAIN'S SEAT AFT INBD SEAT TRACK HAS ELONGATED HOLES BEYOND LIMITS. SRXR430X. GROUNDED - YES. REMOVED AND REPLACED CAPITAIN SEAT AFT INBOARD SEAT TRAK IAW CMM
- [SDR ASAA2026010463655](https://openairdocs.org/sdr/ASAA2026010463655), Jan 4, 2026: POWER SUPPLY. INOPERATIVE. RIGHT OVERWING AND BEHIND THE WING EMERGENCY LIGHTS FAILED CAPACITY TEST. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK M1671 IAW AMM 33-51-06-960-802. OPS 
- [SDR ASAA2026010463654](https://openairdocs.org/sdr/ASAA2026010463654), Jan 4, 2026: POWER SUPPLY. INOPERATIVE. L1 DOOR EXTERNAL EMERGENCY LIGHT FAILED CAPACITY TEST. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK M1677 IAW AMM 33-51-06-960-802. OPS CHECKED GOOD.
- [SDR ASAA2026010463653](https://openairdocs.org/sdr/ASAA2026010463653), Jan 4, 2026: BATTERY PACK. NO TEST. LEFT OVERWING AFT & BEHIND THE WING EXTERNAL EMERGENCY LIGHT FAILED CAPACITY TEST. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK M1670 IAW AMM 33-51-06-960-
- [SDR ASAA2026010463652](https://openairdocs.org/sdr/ASAA2026010463652), Jan 4, 2026: BATTERY PACK. NO TEST. EMERGENCY LIGHT AT ROW 17 RIGHT HAND FAILED CAPACITY TEST. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK M1671 IAW AMM 33-51-06-960-802 ON MIG5 NONROUTINE S
- [SDR ASAA2026010463651](https://openairdocs.org/sdr/ASAA2026010463651), Jan 4, 2026: BATTERY PACK. NO TEST. R1 DOOR EXTERNAL EMERGENCY LIGHT FAILED CAPACITY TEST. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK M2816 IAW AMM 33-51-06-960-802. PERFORMED OPS CHECKED G
- [SDR ASAA2026010463650](https://openairdocs.org/sdr/ASAA2026010463650), Jan 4, 2026: BATTERY PACK. NO TEST. R2 DOOR EXTERNAL EMERGENCY LIGHT FAILED CAPACITY TEST. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK IAW AMM 33-51-06-960-802. PERFORMED OPS CHECKED GOOD.
- [SDR ASAA2025120762878](https://openairdocs.org/sdr/ASAA2025120762878), Dec 7, 2025: POWER SUPPLY. INOPERATIVE. EMERGENCY LIGHT EXIT SIGN BATTERY M1673 FAILS TASK CARD 33-055-00. GROUNDED - YES. REPLACED EMERGENCY LIGHT M1673 BATTERY PACK PER AMM 33-51-06. BATTERY PACK CH
- [SDR ASAA2025120362837](https://openairdocs.org/sdr/ASAA2025120362837), Dec 3, 2025: LENS. MISINSTALLED. FLIGHT ATTENENT REPORTS THAT THE ORANGE AND BLUE FUNCTIONS OF THE AFT FA VISUAL ALERTING SYSTEM ( ON CEILING) ARE REVERSED. GROUNDED - YES. AFT GALLEY EXIT SIGN
- [SDR ASAA2025100161311](https://openairdocs.org/sdr/ASAA2025100161311), Oct 1, 2025: DOOR. NO DISCREPANCY. JETWAY AGENT REPORTS L1 DOOR FEELS ABNORMAL WHEN CLOSING. GROUNDED - YES. PERFORMED GENERAL VISUAL OF DOOR AND OPENED AND CLOSED L1 DOOR. L1 DOOR FUNCTIONS NORM
- [SDR ASAA2024090952411](https://openairdocs.org/sdr/ASAA2024090952411), Sep 9, 2024: JAM-NUT. LOOSE. FA'S REPORT THAT R1 DOOR IS DIFFICULT TO CLOSE FULLY. CLOSES WITH HANDLE IN CORRECT POSITION, BUT CAN LEAVE OPEN GAP AT UPPER RIGHT CORNER. REQUIRES MULTIPLE AT
- [SDR ASAA2024072751362](https://openairdocs.org/sdr/ASAA2024072751362), Jul 27, 2024: COVER. MISSING. ROW 17A EMER EXIT LIGHT COVER MISSING. GROUNDED - YES. REINSTALLED EMER. EXIT LIGHT COVER AT ROW 17A AS REQUIRED.
- [SDR ASAA2023110746078](https://openairdocs.org/sdr/ASAA2023110746078), Nov 7, 2023: OIL FILTER. CLOGGED. APU LUBE MODULE LUBE FILTER DPI POPPED WILL NOT RESET. GROUNDED - YES. (RESOLVED ON W/O: 1975989 TASKCARD: N/R-00004 ) REMOVED AND REPLACED OIL FILTER ELEMENTS 
- [SDR ASAA2023101745711](https://openairdocs.org/sdr/ASAA2023101745711), Oct 17, 2023: UNKNOWN. UNKNOWN. FMC DISAGREE DISPLAYED DURING PREFLIGHT. GROUNDED - YES. PERFORMED IFIM 34-61-00-810-918 & FMC DISAGREE MSG EXTINGUISHED.
- [SDR ASAA2023100745489](https://openairdocs.org/sdr/ASAA2023100745489), Oct 7, 2023: UNKNOWN. UNKNOWN. # 2 ENG TRF DRAIN LINE @ 6:00 POS, LH LINE MISSING. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023100245411](https://openairdocs.org/sdr/ASAA2023100245411), Oct 2, 2023: UNKNOWN. UNKNOWN. WHILE PERFORMING T/C 31-005-00. FOUND ENG 2 EEC C1 SMT, FAULT CODE 73-43984 " ENGINE START OVERSPEED THRUST CONTROL MALFUNCTION ACCOMMODATION TEST FAILED ( SING
- [SDR ASAA2023093045397](https://openairdocs.org/sdr/ASAA2023093045397), Sep 30, 2023: UNKNOWN. UNKNOWN. AFT GALLEY EMERGENCY LIGHT FLICKER OCCASIONALLY. GROUNDED - YES. ACCOMPLISHED B737-9 IFIM 33-51-00-810-817. OPS TEST NORMAL REF B737-9 AMM 33-51-00-720-801.
- [SDR ASAA2023092945479](https://openairdocs.org/sdr/ASAA2023092945479), Sep 29, 2023: FUEL NOZZLE. COKED. GE DIAGNOSTICS REPORTS CNR 20230929082 #2 ENGINE (S/N 603191) TREND DATA SHOWS EXCESS COKING OF THE FUEL NOZZLE MAIN ORIFICES. (#PRI3/ETOPS) (FULL SET FUEL NOZZ
- [SDR ASAA2023092945399](https://openairdocs.org/sdr/ASAA2023092945399), Sep 29, 2023: UNKNOWN. UNKNOWN. SINGLE CHANNEL SPEED TRIM FAIL FAULT FOUND AT TOP OF DESCENT SPEED TRIM FAIL LIGHT EXTINGUISHES WITH MASTER CAUTION RESET. GROUNDED - YES. INTERROGATED DFCS BIT
- [SDR ASAA2023092945386](https://openairdocs.org/sdr/ASAA2023092945386), Sep 29, 2023: UNKNOWN. UNKNOWN. SINGLE CHANNEL SPEED TRIM FAULT FOUND AT TOP OF DESCENT SPEED TRIM LIGHT EXTINGUISHES WITH MASTER CAUTION RESET. GROUNDED - YES. COMPLIED WITH B737-9 IFIM TASK 
- [SDR ASAA2023092645325](https://openairdocs.org/sdr/ASAA2023092645325), Sep 26, 2023: ANTI-ICE VALVE. FAULTY. R VALVE LIGHT ILLUMINATED WITH WING HEAT SELECTED ON DURING APPROACH. GROUNDED - YES. REMOVED AND REPLACED R/H WING THERMAL ANTI-ICE VALVE, REF B737-9 AMM 30-11
- [SDR ASAA2023091945221](https://openairdocs.org/sdr/ASAA2023091945221), Sep 19, 2023: UNKNOWN. UNKNOWN. WHILE PERFORMING T/C 31-005-00FOUND SMT SHORT TIME FAULT ENG 2 EEC C1, WITH ASSOCIATE MTX MESSAGE 73-43984 ELECTRONIC OVERSPEED THRUST CONTROL MALFUNCTION ACCOM
- [SDR ASAA2023090845003](https://openairdocs.org/sdr/ASAA2023090845003), Sep 8, 2023: SENSOR. UNKNOWN. WHILE INTERROGATING SCHEDULED MAINTENANCE TASK DISPLAY PER TASK CARD NUMBER 31-005-00, FOUND FAULT CODE 73-44633, " FAN SPEED (N1) SENSOR LOW TOTH SIGNAL IS INV
- [SDR ASAA2023083044984](https://openairdocs.org/sdr/ASAA2023083044984), Aug 30, 2023: MODULATING VALVE. FAULTY. TECH SERVICES REQUEST FOR FOLLOW-UP TO AERMETRIC FAULT 21-55091(RT PACK TCV IS OUT OF RANGE OR VALVE IS NOT IN COMMANDED POSITION)----(#PRI2)----ETOPS SIGNIFICA
- [SDR ASAA2023082644798](https://openairdocs.org/sdr/ASAA2023082644798), Aug 26, 2023: UNKNOWN. UNKNOWN. FOUND MAINT LIGHT "ON" FAULT CODE 77-43023 ACTIVE #2 ENGINE. GROUNDED - YES. FOUND ENG #2 N1 SENSOR OUT OF RANGE EEC CHANNEL "A". ACCOMP ENG #2 IDLE SYSTEM TEST
- [SDR ASAA2023082544773](https://openairdocs.org/sdr/ASAA2023082544773), Aug 25, 2023: UNKNOWN. UNKNOWN. FLIGHT ATTENDANTS REPORT CABIN TEMP EXCESSIVELY HOT FWD & AFT TEMP SELECTORS ON MAX COOL. RAN THE CABIN TEMPERATURE HOT QRH AND CABIN TEMP RETURNED TO NORMAL. T
- [SDR ASAA2023081844694](https://openairdocs.org/sdr/ASAA2023081844694), Aug 18, 2023: UNKNOWN. UNKNOWN. OVERHEAD MAINT LIGHT CAME ON AFTER LANDING AND REMAINS ON. GROUNDED - YES. STATUS MESSSAGE #2 2 CTRL DISPLAYED. FOUND MESSAGE FAN SPEED ( N1) SENSOR IS OUT OF R
- [SDR ASAA2023081644642](https://openairdocs.org/sdr/ASAA2023081644642), Aug 16, 2023: UNKNOWN. UNKNOWN. SPEED TRIM LIGHT ON RECALL. GROUNDED - YES. ACCOMPLISHED IFIM 22-00-810-D73, DFCS SPEED/STAB TRIM TEST PASSED, NO HISTORY 60 DAYS.
- [SDR ASAA2023081544613](https://openairdocs.org/sdr/ASAA2023081544613), Aug 15, 2023: UNKNOWN. UNKNOWN. WRX FAIL MESSAGE ON ND. WITH PWS FAIL. GROUNDED - YES. CYCLE AIRCRAFT POWER. PERFORMED WEATHER RADAR OPERATIONAL TEST. REF AMM TASK 34-41-710-801. OPS CHECKED G
- [SDR ASAA2023081144554](https://openairdocs.org/sdr/ASAA2023081144554), Aug 11, 2023: UNKNOWN. UNKNOWN. DURING PDC NOTED MAINT LIGHT ILLUMINATED OVERHEAD. GROUNDED - YES. ON STATUS PAGE ENG 2 CONTROL STATUS MESSAGE SHOWS. ACCOMPLISHED EXISTING FAULTS CHECK & FOUND
- [SDR ASAA2023080844500](https://openairdocs.org/sdr/ASAA2023080844500), Aug 8, 2023: UNKNOWN. UNKNOWN. AFTER LANDING, DURING ROLLOUT, BEFORE FLAPS RETRACTED UP, MAINTENANCE LIGHT ILLUMINATED. GROUNDED - YES. COMPLIED BOTH FAULT INTERROGATION FOR MX MSG, FOUND NON
- [SDR ASAA2023080744455](https://openairdocs.org/sdr/ASAA2023080744455), Aug 7, 2023: UNKNOWN. UNKNOWN. WHEN COMPLETING T/C 05-020-01, FOUND PRESENT LEG FAULT "ENG 2 EE C1". GROUNDED - YES. FOUND MAINT MSG 73-43855. PERFORMED IFIM TASK G73-22-00-810-830. OMF SHOWS
- [SDR ASAA2023080144345](https://openairdocs.org/sdr/ASAA2023080144345), Aug 1, 2023: UNKNOWN. UNKNOWN. UNABLE TO ESTABLISH COMMUNICATION ON HF2 RADIO. COULD NOT TRANSMITA NOR RECEIVE AUDIO. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023072544230](https://openairdocs.org/sdr/ASAA2023072544230), Jul 25, 2023: UNKNOWN. UNKNOWN. FOUND ENG 2 EEC C1 FAULT WHILE PREFORMING T/C 05-020-01. GROUNDED - YES. (RESOLVED ON W/O: 1963301 TASKCARD: N/R-00001 ) INTERROGATED SMT WITH NO FAULTS FOUND. 
- [SDR ASAA2023072144168](https://openairdocs.org/sdr/ASAA2023072144168), Jul 21, 2023: UNKNOWN. UNKNOWN. SMT MSG ENG 1 EEC C2 FAULT. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023071344015](https://openairdocs.org/sdr/ASAA2023071344015), Jul 13, 2023: UNKNOWN. UNKNOWN. SMT MSG ENG 2 EEC C1 FAULT. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023070543949](https://openairdocs.org/sdr/ASAA2023070543949), Jul 5, 2023: CARTRIDGE. UNKNOWN. TECH SERVICES FOLLOW UP ON GE CNR # 20230705063, #2 ENG OIL FILTER APPROACHING BYPASS. GROUNDED - YES. REMOVED AND REPLACED OIL FILTER CARTRIDGE ELEMENT REF AMM
- [SDR ASAA2023070343867](https://openairdocs.org/sdr/ASAA2023070343867), Jul 3, 2023: UNKNOWN. UNKNOWN. SAT CALL INOP. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023070143849](https://openairdocs.org/sdr/ASAA2023070143849), Jul 1, 2023: UNKNOWN. UNKNOWN. WHILE PERFORMING T/C 31-005-00 FOUND SMT SHORT TIME FAULT ENG 2 EEC C1. FAULT CODE 73245152, CORRELATED MAINT MSG. 73-43984 & 73-43855. GROUNDED - YES. NEITHER 
- [SDR ASAA2023062743771](https://openairdocs.org/sdr/ASAA2023062743771), Jun 27, 2023: UNKNOWN. UNKNOWN. PERFORMING T/C 05-020-01 FOUND ENG # 2 EEC C1 SMT WITH CORRELATED FAULT CODE 73-43983 "ELECTRONIC OVERSPEED THRUST CONTROL MALFUNCTION ACCOMADATION TEST FAILED 
- [SDR ASAA2023061643607](https://openairdocs.org/sdr/ASAA2023061643607), Jun 16, 2023: UNKNOWN. UNKNOWN. SPEED TRIM FAIL ILLUMINATED ON RECALL, LIGHT EXTINGUISHES WHEN MASTER CAUTION SYSTEM IS RESET. GROUNDED - YES. LAST LEG B FCC FAULTED TRIM CMD RESPONSE MONITOR,
- [SDR ASAA2023040342714](https://openairdocs.org/sdr/ASAA2023040342714), Apr 3, 2023: UNKNOWN. UNKNOWN. FMC DISAGREE DISPLAY ON ND. GROUNDED - YES. QRH PROCEDURE PERFORMED.
- [SDR ASAA2023032942633](https://openairdocs.org/sdr/ASAA2023032942633), Mar 29, 2023: UNKNOWN. UNKNOWN. FMC DISAGREE MSG BOTH SIDES. GROUNDED - YES. PERFORMED B737-9 IFIM 34-61-00-810-918, FMC MESSAGE CLEARED.
- [SDR ASAA2023032342590](https://openairdocs.org/sdr/ASAA2023032342590), Mar 23, 2023: UNKNOWN. UNKNOWN. DURING ASA TC 05-020-01 FOUND SHORT TIME FAULT ENG 2 EEC C1 WITH CORRELATED MSG 73-43984 "ELECTRONIC OVERSPEED THRUST CONTROL MALFUNCTION ACCOMMODATION TEST FAI
- [SDR ASAA2023032342557](https://openairdocs.org/sdr/ASAA2023032342557), Mar 23, 2023: UNKNOWN. UNKNOWN. SPEED TRIM FAIL LIGHT COME ON ON RECALL IN FLIGHT. GROUNDED - YES. AFCS LOGGED FAULT 22-11186 ON FCC B RAN B737-9 IFIM TASK 22-11-00-810-C61 NUISANCE FAULT RESE
- [SDR ASAA2023032142454](https://openairdocs.org/sdr/ASAA2023032142454), Mar 21, 2023: UNKNOWN. UNKNOWN. SPEED TRIM LIGHT ILLUMINATES WITH MASTER RECALL. LIGHT EXTINGUISHES WITH RESET. GROUNDED - YES. REF B737-9 FIM TASK 22-11-00-810-D71 FOUND 1 MSG 22-11186 TRIM C
- [SDR ASAA2023030642267](https://openairdocs.org/sdr/ASAA2023030642267), Mar 6, 2023: UNKNOWN. UNKNOWN. ENGINE 2 EEC C1 FAULT WITH CORRELATED FAULT CODE 73245152 'ELECTRONIC OVERSPEED THRUST CONTROL MALFUNCTION ACCOMODATION TEST FAILED (SINGLE CHANNEL.)'. GROUNDED
- [SDR ASAA2023022442074](https://openairdocs.org/sdr/ASAA2023022442074), Feb 24, 2023: UNKNOWN. UNKNOWN. LEFT SIDE WINDOW HEAT (L2) ILLUMINATED OVERHEAT DURING TAXI. QRH PROCEDURE ACCOMPLISHED AND LIGHT STAYED OUT. GROUNDED - YES. WINDOW HEAT OPS NORMAL NO MX ACTIO
- [SDR ASAA2023022042019](https://openairdocs.org/sdr/ASAA2023022042019), Feb 20, 2023: UNKNOWN. UNKNOWN. ON DESCENT CHECK DURING "RECALL" CHECK, "SPEED TRIM FAIL" ILLUMINATED. INDICATION CLEARS ON RESET (SINGLE CHNL FAIL FAIL). GROUNDED - YES. ACCOMPLISHED B737-9 I

All 62: https://openairdocs.org/aircraft/N973AK/reports.md

## STCs that may be installed (OpenAirDocs) (105, first 50)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Boeing 737-9)

- [STC ST03438NY](https://openairdocs.org/stc/ST03438NY): Installation of Adams Rite Lavatory Equipment. Delta Engineering Corporation
- [STC ST04669CH](https://openairdocs.org/stc/ST04669CH): Installation of Honeywell Advanced Communications and Entertainment System (ACES). Honeywell Aerospace
- [STC ST09941AC](https://openairdocs.org/stc/ST09941AC): Installation of a Gables SATVOICE Annunciator Panel. L2 Aviation
- [STC ST02269NY](https://openairdocs.org/stc/ST02269NY): Installation of Self Illuminating Floor Path Marking System. Lufthansa Technik AG
- [STC ST00885LA](https://openairdocs.org/stc/ST00885LA): Installation of fire extinguisher cartridges as replacements for Pacific Scientific fire extinguisher cartridges in fire extinguisher bottles. AMETEK AMERON, LLC d/b/a MASS Systems
- [STC ST12443LA](https://openairdocs.org/stc/ST12443LA): Installation of Teledyne Controls Edge Computing Platform (ECP). Teledyne Controls, LLC
- [STC ST04474NY](https://openairdocs.org/stc/ST04474NY): Activation of Wireless Local Area Network (WLAN) system. Jet Aviation AG
- [STC ST04254NY](https://openairdocs.org/stc/ST04254NY): Installation of Viasat Satcom Software. ALOFT AeroArchitects
- [STC ST09927AC](https://openairdocs.org/stc/ST09927AC): Installation of a Gables Audio Management System. L2 Aviation
- [STC ST12005SE](https://openairdocs.org/stc/ST12005SE): Installation of Starlink Aviation System. Space Exploration Technologies Corp./Starlink Aviation
- [STC ST04040CH](https://openairdocs.org/stc/ST04040CH): Activation of Smart Runway and Smart Landing (SRSL) Runway Awareness Advisory System (RAAS) Functions for Honeywell Mark V and Mark V-A Enhanced Ground Proximity Warning Systems (EGPWS). Honeywell International Inc
- [STC ST00555AT](https://openairdocs.org/stc/ST00555AT): Installation of Airshow 210 system. AIRCRAFT RECONFIG TECHNOLOGIES, LLC. Lists 737 Series
- [STC ST04384AT](https://openairdocs.org/stc/ST04384AT): Interior reconfiguration installation. AIRCRAFT RECONFIG TECHNOLOGIES, LLC
- [STC ST00952LA](https://openairdocs.org/stc/ST00952LA): Installation of Mass Systems fire extinguisher cartridges as replacements for Kidde fire extinguisher cartridges in fire extinguisher bottles. AMETEK AMERON LLC d/b/a MASS Systems
- [STC ST04328NY](https://openairdocs.org/stc/ST04328NY): The Manufacture and Installation of Exterior Placards, Labels and Signs is to be performed, installed. Libellule Monde Inc
- [STC ST03405NY](https://openairdocs.org/stc/ST03405NY): Installation (with demod option) of an Connectivity Antenna. Delta Engineering Corporation
- [STC ST04758NY](https://openairdocs.org/stc/ST04758NY): Installation of single cockpit USB charger. Eirtech Aviation Services Inc
- [STC ST09844DS](https://openairdocs.org/stc/ST09844DS): This project installs a new Next-IS media server and installation provisions to interface with the Starlink IFC system. United Airlines
- [STC ST04052NY](https://openairdocs.org/stc/ST04052NY): ViaSat KA Cabin Distribution System Installation. ALOFT AeroArchitects
- [STC ST02908NY](https://openairdocs.org/stc/ST02908NY): Installation of a Panasonic Avionics Corporation Global Communications Suite (GCS) and/or In-Flight Entertainment (IFE). Delta Engineering Corporation
- [STC ST04051NY](https://openairdocs.org/stc/ST04051NY): ViaSat KA SATCOM Antenna System Installation. ALOFT AeroArchitects
- [STC ST00030IB](https://openairdocs.org/stc/ST00030IB): Installation of Test Tech ELT. APTOZ EHF
- [STC ST03885AT](https://openairdocs.org/stc/ST03885AT): Installation of an Avionica, Inc. avCM Cellular Module. Aircraft Systems and Manufacturing Inc
- [STC ST12102IB](https://openairdocs.org/stc/ST12102IB): Installation of a Honeywell Aspire 400 SBB Satcom and/or an AMT-3800 high gain antenna. Jet Aviation AG
- [STC ST12059IB](https://openairdocs.org/stc/ST12059IB): Installation of Seat to Floor Interface - isotropic intercostals for installation of seats and divans. JET AVIATION AG
- [STC ST04243NY](https://openairdocs.org/stc/ST04243NY): Installation of the ALOFT AeroArchitects Auxiliary Fuel System (AFS). ALOFT AeroArchitects
- [STC ST04368AT](https://openairdocs.org/stc/ST04368AT): Installation of a Rockwell Collins CMU-900 ACARS/CPDLC Communication Management Unit P/N 822-1239-151 to provide Data Link communications via existing data link capable VHF Mode 2 (VDLM2), HF and/or SATCOM systems and host the CPDLC application which support EASA Link 2000+ communications. LB Aircraft Engineering Inc
- [STC ST00079IB](https://openairdocs.org/stc/ST00079IB): Integration of Halon-free Portable Fire Extinguisher HAFEX. UMLAUT ENGINEERING GMBH
- [STC ST00215IB](https://openairdocs.org/stc/ST00215IB): Installation of saf-Tglo ECO Photoluminescent Aisle Path Marking Systems. STG AEROSPACE GERMANY GmbH
- [STC ST01936WI](https://openairdocs.org/stc/ST01936WI): Installation of LED lights. AeroLED's Holdings LLC
- [STC ST09830DS](https://openairdocs.org/stc/ST09830DS): AVOD Integration on Boeing B737-9 fleet. United Airlines
- [STC ST04585AT](https://openairdocs.org/stc/ST04585AT): Installation of a Cobham AVIATOR 200S Inmarsat / Swift Broadband Satellite Communications System. Avionics Support Group
- [STC ST04071NY](https://openairdocs.org/stc/ST04071NY): Installation of VisionSafe Emergency Vision Assurance System (EVAS). VisionSafe LLC
- [STC ST03952NY](https://openairdocs.org/stc/ST03952NY): Installation of Controller-Pilot Data-Link communications. 365 Aerospace Ltd Aerospace Logistics Centre
- [STC ST03403NY](https://openairdocs.org/stc/ST03403NY): Installation of a Intelsat Cabin Connectivity (with demod option) system. Delta Engineering Corporation
- [STC ST04493AT](https://openairdocs.org/stc/ST04493AT): Interior Reconfiguration (Carpet Installation). ZIM Aircraft Cabin Solutions LLC
- [STC ST00161IB](https://openairdocs.org/stc/ST00161IB): Installation of a DK180 Underwater Locator Device (ULD) using Dukane mounting bracket. Fokker Services B.V
- [STC ST00158IB](https://openairdocs.org/stc/ST00158IB): Installation of Tablet Cradle, consisting of the installation of 2 arm mounts on the existing sliding windows (both sides, Captain and First Officer). PMV Engineering
- [STC ST04203AT](https://openairdocs.org/stc/ST04203AT): Installation of a Constant Friction Mount , Cradle, and Integrated Power Supply. Avionics Support Group Inc
- [STC ST11386DS](https://openairdocs.org/stc/ST11386DS): Installation of USB Charging Hubs on the Flight Deck. Aircraft Systems and Manufacturing Inc
- [STC ST00792NY](https://openairdocs.org/stc/ST00792NY): Installation of evacuation slide and compartment assemblies. Air Cruisers
- [STC ST00126IB](https://openairdocs.org/stc/ST00126IB): Replacement of Halon agent with alternate Halon-free Portable Fire Extinguisher agent. AMAC Aerospace Switzerland AG
- [STC ST00140IB](https://openairdocs.org/stc/ST00140IB): Installation of Potable Water Pre-Select system. International Water-Guard Industries Inc
- [STC ST04664NY](https://openairdocs.org/stc/ST04664NY): Activation of Wireless Local Area Network (WLAN) system. AMAC Aerospace AG
- [STC ST00121IB](https://openairdocs.org/stc/ST00121IB): Installation of photoluminescent floor path marking with the option to install LED lighting. Cobalt Aerospace Limited
- [STC ST04562NY](https://openairdocs.org/stc/ST04562NY): Installation of saf-Tglo® SuperSeal UltraLite-X (SSUL-X) Photoluminescent Floor Proximity Emergency Escape Path Marking Systems. STG AEROSPACE GERMANY GmbH
- [STC ST00105IB](https://openairdocs.org/stc/ST00105IB): Introduction of Activation of Wireless Charging Systems for Portable Electronic Devices. AMAC AEROSPACE SWITZERLAND AG
- [STC ST04594CH](https://openairdocs.org/stc/ST04594CH): Installation of a Viasat Cellular Data Modem (VCDM). Envoy Aerospace LLC
- [STC ST02747SE](https://openairdocs.org/stc/ST02747SE): Remove existing two (2) Branding Panels from forward monuments and install new two (2) Jamco Branding Panels on Boeing Model 737-9 aircraft. Jamco America, Inc
- [STC SA00787SE](https://openairdocs.org/stc/SA00787SE): Installation of Sliding Carpet Cargo Loading System in the cargo compartment. SBC-America LLC

All 105: https://openairdocs.org/aircraft/N973AK/stcs.md

## Related

- Other Boeing 737-9 aircraft: https://openairdocs.org/model/boeing-737-9/aircraft.md
- The CFM International LEAP-1B28 series engine: https://openairdocs.org/engine/cfm-international-leap-1b28-series.md

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OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.