# N251AK: Boeing 737-990ER - Status: Valid registration - Airframe: [Boeing 737-990ER](https://openairdocs.org/model/boeing-737-990er) (registry code 13848CE, 222 seats) - Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE) (The Boeing Company) (OpenAirDocs) - Serial number: 62470 - Type: Fixed wing multi engine - Engine type: Turbo-fan - Certificate issued: July 14, 2016 - Expires: July 31, 2029 - Mode S code: A25B3F - Registered owner: [Alaska Airlines Inc](https://openairdocs.org/faa-owner/ALASKA%20AIRLINES%20INC) - Location: [Seatac, WA](https://openairdocs.org/faa-place/WA/Seatac) - 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=251AK - Page: https://openairdocs.org/aircraft/N251AK 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. ## ADs that may apply (OpenAirDocs): 103 in force ### Matched by airframe (Boeing 737-990ER) - [AD 2026-20-14](https://openairdocs.org/ad/2026-20-14): Stabilizers · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Nov 23, 2026 - [AD 2026-20-13](https://openairdocs.org/ad/2026-20-13): Equipment/furnishings · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Nov 23, 2026 - [AD 2026-13-13](https://openairdocs.org/ad/2026-13-13): Navigation · Boeing 737-100 Series, 737-200 Series, 737-200C Series and 9 more. 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 2025-24-02](https://openairdocs.org/ad/2025-24-02): Landing gear · Boeing 737-700 Series, 737-800 Series, 737-900 Series and 1 more. Effective Dec 10, 2025 - [AD 2025-19-12](https://openairdocs.org/ad/2025-19-12): Landing Gear · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Nov 6, 2025 - [AD 2025-15-01](https://openairdocs.org/ad/2025-15-01): Fuselage · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Aug 25, 2025 - [AD 2025-07-03](https://openairdocs.org/ad/2025-07-03): Fuselage · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective May 13, 2025 - [AD 2025-04-03](https://openairdocs.org/ad/2025-04-03): Exhaust · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Apr 8, 2025 - [AD 2025-04-02](https://openairdocs.org/ad/2025-04-02): Powerplant · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Apr 8, 2025 - [AD 2025-04-01](https://openairdocs.org/ad/2025-04-01): Powerplant · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Apr 8, 2025 - [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 2024-16-10](https://openairdocs.org/ad/2024-16-10): Instruments · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Oct 28, 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 2024-06-01](https://openairdocs.org/ad/2024-06-01): Fuselage · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective May 22, 2024 - [AD 2023-13-05](https://openairdocs.org/ad/2023-13-05): Fuselage · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Oct 27, 2023 - [AD 2023-13-12](https://openairdocs.org/ad/2023-13-12): Oxygen · Boeing 737-100 Series, 737-200 Series, 737-200C Series and 17 more. Effective Sep 5, 2023 - [AD 2023-12-13](https://openairdocs.org/ad/2023-12-13): Navigation · Boeing 737-100 Series, 737-200 Series, 737-200C Series and 9 more. Effective Jun 21, 2023 - [AD 2023-06-15](https://openairdocs.org/ad/2023-06-15): Fuselage · Boeing 737-600 Series, 737-700 Series, 737-800 Series and 2 more. Effective May 30, 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 2023-04-17](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 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 2022-15-08](https://openairdocs.org/ad/2022-15-08): Information systems · Airbus A318-111, A318-112, A319-111 and 49 more. Effective Aug 12, 2022 - [AD 2022-11-13](https://openairdocs.org/ad/2022-11-13): Fuselage · Boeing 737-700 Series, 737-800 Series and 737-900ER Series. Effective Aug 3, 2022 - [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 2021-26-17](https://openairdocs.org/ad/2021-26-17): Equipment/furnishings · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Feb 15, 2022 - [AD 2021-18-17](https://openairdocs.org/ad/2021-18-17): Auto flight · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Dec 20, 2021 - [AD 2021-17-08](https://openairdocs.org/ad/2021-17-08): Fuselage · Boeing 737-800 Series and 737-900ER Series with STC ST04096CH. Effective Aug 17, 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 2021-11-24](https://openairdocs.org/ad/2021-11-24): Fuel · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Jul 20, 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 2021-07-17](https://openairdocs.org/ad/2021-07-17): Electrical power · Boeing 737-900ER Series. Effective May 25, 2021 - [AD 2021-02-14](https://openairdocs.org/ad/2021-02-14): Fuel · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Mar 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 2020-21-02](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 2020-18-13](https://openairdocs.org/ad/2020-18-13): Fuel · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Oct 29, 2020 - [AD 2020-16-51](https://openairdocs.org/ad/2020-16-51): Pneumatic · Boeing 737-300 Series, 737-400 Series, 737-500 Series and 6 more. Effective Aug 26, 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 2020-01-11](https://openairdocs.org/ad/2020-01-11): Air conditioning · Boeing 737-800 Series, 737-900 Series and 737-900ER Series. Effective Feb 21, 2020 - [AD 2019-19-10](https://openairdocs.org/ad/2019-19-10): Fuel · Boeing 737-300 Series, 737-400 Series, 737-500 Series and 21 more. Effective Jan 16, 2020 - [AD 2019-24-15](https://openairdocs.org/ad/2019-24-15): Equipment/ furnishings · Boeing 737-900ER Series. Effective Jan 14, 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 2019-14-02](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 2019-11-06](https://openairdocs.org/ad/2019-11-06): Fuselage · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Jul 17, 2019 - [AD 2019-11-03](https://openairdocs.org/ad/2019-11-03): Flight Controls · Boeing 737-700C Series, 737-800 Series and 737-900ER Series. Effective Jun 10, 2019 - [AD 2019-03-07](https://openairdocs.org/ad/2019-03-07): Wings · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Mar 29, 2019 - [AD 2019-01-03](https://openairdocs.org/ad/2019-01-03): Landing Gear · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Mar 19, 2019 - [AD 2018-26-06](https://openairdocs.org/ad/2018-26-06): Doors · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Feb 1, 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 ### Historical (superseded or no longer in force) - [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 2022-05-04](https://openairdocs.org/ad/2022-05-04) (historical): Navigation · Boeing 737-100 Series, 737-200 Series, 737-200C Series and 9 more. Effective Feb 24, 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 2021-09-06](https://openairdocs.org/ad/2021-09-06) (historical): Fuselage · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Jun 8, 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 2019-25-17](https://openairdocs.org/ad/2019-25-17) (historical): Indicating/ recording system · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Dec 27, 2019 - [AD 2019-20-03](https://openairdocs.org/ad/2019-20-03) (historical): Information systems · Airbus A340-312, A340-313, A318-111 and 48 more. Effective Nov 19, 2019 - [AD 2019-22-10](https://openairdocs.org/ad/2019-22-10) (historical): Fuselage · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Nov 13, 2019 - [AD 2019-20-02](https://openairdocs.org/ad/2019-20-02) (historical): Fuselage · Boeing Airplane Company, Wichita Division 75 (Army PT-13), 737-600 Series, 737-700 Series and 4 more. Effective Oct 3, 2019 - [AD 2019-03-26](https://openairdocs.org/ad/2019-03-26) (historical): Equipment/furnishings · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Apr 8, 2019 - [AD 2017-16-05](https://openairdocs.org/ad/2017-16-05) (historical): Wings · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Sep 22, 2017 - [AD 2017-14-13](https://openairdocs.org/ad/2017-14-13) (historical): Equipment and Furnishings · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Aug 23, 2017 - [AD 2017-12-07](https://openairdocs.org/ad/2017-12-07) (historical): Air conditioning · Boeing 737-800 Series, 737-900 Series and 737-900ER Series. Effective Jul 20, 2017 - [AD 2016-18-01](https://openairdocs.org/ad/2016-18-01) (historical): Landing Gear · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Oct 5, 2016 - [AD 2016-13-16](https://openairdocs.org/ad/2016-13-16) (historical): Stabilizers · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Aug 12, 2016 - [AD 2015-19-03](https://openairdocs.org/ad/2015-19-03) (historical): Fuel Selector/Shutoff Valve · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Oct 21, 2015 - [AD 2015-16-01](https://openairdocs.org/ad/2015-16-01) (historical): Air Conditioning · Boeing 737-100 Series, 737-200 Series, 737-200C Series and 9 more. Effective Sep 15, 2015 - [AD 2013-26-08](https://openairdocs.org/ad/2013-26-08) (historical): Ice and Rain Protection · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Feb 10, 2014 - [AD 2013-18-09](https://openairdocs.org/ad/2013-18-09) (historical): Communications · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 137 more. Effective Oct 3, 2013 - [AD 2013-07-09](https://openairdocs.org/ad/2013-07-09) (historical): Oxygen · Boeing 737-700 Series, 737-700C Series, 737-800 Series and 4 more. Effective May 20, 2013 - [AD 2013-07-07](https://openairdocs.org/ad/2013-07-07) (historical): Stabilizers · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective May 20, 2013 - [AD 2012-19-11](https://openairdocs.org/ad/2012-19-11) (historical): Air Conditioning · Boeing 737-100 Series, 737-200 Series, 737-200C Series and 9 more. Effective Nov 7, 2012 - [AD 2010-17-19](https://openairdocs.org/ad/2010-17-19) (historical): Flight controls · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Sep 9, 2010 - [AD 2010-09-05](https://openairdocs.org/ad/2010-09-05) (historical): Flight controls · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Apr 29, 2010 - [AD 2010-06-51](https://openairdocs.org/ad/2010-06-51) (historical): Flight controls · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Apr 7, 2010 - [AD 2009-21-10](https://openairdocs.org/ad/2009-21-10) (historical): Oxygen · Airbus A300, Model B4-605R, A300, Model B4-620, A300, Model B4-622 and 138 more. Effective Dec 17, 2009 - [AD 2007-18-52](https://openairdocs.org/ad/2007-18-52) (historical): Main slat track downstop assemblies · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Sep 26, 2007 - [AD 2007-18-51](https://openairdocs.org/ad/2007-18-51) (historical): Main slat track downstop assembly · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 3 more. Effective Aug 25, 2007 All 131: https://openairdocs.org/aircraft/N251AK/ads.md ## Information bulletins (advisory) (14 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 AIR-21-12](https://openairdocs.org/saib/AIR-21-12): Thrust Reversers. Issued Aug 3, 2021 - [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 - [SAIB NM-18-18](https://openairdocs.org/saib/NM-18-18): Equipment/Furnishings - First Observer's Seat Cup Holder. Issued Jul 2, 2018 - [SAIB NM-17-17](https://openairdocs.org/saib/NM-17-17): Oxygen System. Issued Jun 19, 2017 - [SAIB NM-17-10](https://openairdocs.org/saib/NM-17-10): Maintenance Practices. Issued Apr 13, 2017 - [SAIB NM-16-21](https://openairdocs.org/saib/NM-16-21): Flight Controls. Issued Aug 8, 2016 - [SAIB NM-15-03](https://openairdocs.org/saib/NM-15-03): Flight Controls. Issued Nov 24, 2014 - [SAIB NM-15-02](https://openairdocs.org/saib/NM-15-02): Cabin Equipment/Furnishings. Issued Nov 6, 2014 - [SAIB NM-12-11](https://openairdocs.org/saib/NM-12-11): Equipment/Furnishings: Buffet/Galleys. Issued Jan 10, 2012 - [SAIB NM-08-24](https://openairdocs.org/saib/NM-08-24): Water/Waste: Freezing Potable Water Lines. Issued May 22, 2008 - [SAIB NM-07-47](https://openairdocs.org/saib/NM-07-47): Boeing Model 737 Series Forward Airstairs. Issued Sep 6, 2007 - [SAIB NM-06-56](https://openairdocs.org/saib/NM-06-56): . Issued Jul 19, 2006 ## NTSB investigations None matched to N251AK. ## FAA accident and incident reports None matched to N251AK. ## Service difficulty reports (25) 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 ASAA2026042065635](https://openairdocs.org/sdr/ASAA2026042065635), Apr 20, 2026: BATTERY PACK. INOPERATIVE. INTERIOR EMER LIGHTS BETWEEN ROW 1-11 ON LH SIDE INOP. GROUNDED - YES. REPLACED LH ROW 1-11 EMER LIGHT BATTERY PACK IAW AMM 33-51-06. OPS CHECK GOOD. 4APR676B. - [SDR ASAA2026021464413](https://openairdocs.org/sdr/ASAA2026021464413), Feb 14, 2026: BAFFLE. CRACKED. FWD PIT R/H BAFFLE CORRODED AND HAS ELONGATED HOLE BETWEEN STATIONS 500F AND 500G. GROUNDED - YES. INTERCOSTAL FOUND TO BE CRACKED IAW B737-900 SRM 53-00-53-1A- - [SDR ASAA2026021364445](https://openairdocs.org/sdr/ASAA2026021364445), Feb 13, 2026: TRANSITION PANEL. CORRODED. WHILE GAINING ACCESS TO REPLACE BONDED NUTPLATES AT STA 500J; FOUND R/H TRANSITION PANEL CORRODED FROM STATIONS 500H TO 500L RBL 25. GROUNDED - YES. REMOVED COR - [SDR ASAA2026022364444](https://openairdocs.org/sdr/ASAA2026022364444), Feb 13, 2026: INTERCOSTAL. CORRODED. WHILE GAINING ACCESS TO REPLACE BONDED NUTPLATES AT BS 500J, FOUND RT BAFFLE CORRODED BETWEEN BS 500I - 500J. GROUNDED - YES. REMOVED CORROSION BETWEEN BS 500I - [SDR ASAA2026022364443](https://openairdocs.org/sdr/ASAA2026022364443), Feb 13, 2026: SUPPORT ANGLE. CORRODED. FWD CARGO AFT BULKHEAD BS 500L RT SIDEWALL SUPPORT ANGLE CORRODED AT RBL 25. GROUNDED - YES. REMOVED CORROSION AND CHECKED LIMIT. FOUND TO BE OUT OF LIMITS IAW - [SDR ASAA2026020664210](https://openairdocs.org/sdr/ASAA2026020664210), Feb 6, 2026: SIGN. NO DISCREPANCY. EMERGENCY EXIT SIGN ABOVE 17F IS INTERMITTENT. GROUNDED - YES. INSPECTED AND OPS CHECKED EMERGENCY EXIT LIGHT IAW AMM 33-50-00. OPS CHKD GOOD. - [SDR ASAA2025040757288](https://openairdocs.org/sdr/ASAA2025040757288), Apr 7, 2025: POWER SUPPLY. INOPERATIVE. EMERGENCY LIGHTS ASSOCIATED WITH POWER SUPPLY M1670 ARE INOP. GROUNDED - YES. REMOVED AND REPLACED EMER LIGHT PWR SUPPLY AT M1670 IAW B737NG AMM 33-51-06-960-80 - [SDR ASAA2025040757287](https://openairdocs.org/sdr/ASAA2025040757287), Apr 7, 2025: POWER SUPPLY. INOPERATIVE. EMERGENCY LIGHTS ASSOCIATED WITH POWER SUPPLY M1671 INOP. GROUNDED - YES. RMOVED AND REPLACED EMER LIGHT PWR SUPPLY AT M1671 IAW B737NG AMM33-51-06-960-806. OPS - [SDR ASAA2025040757286](https://openairdocs.org/sdr/ASAA2025040757286), Apr 7, 2025: POWER SUPPLY. INOPERATIVE. EMERGENCY LIGHTS ASSOCIATED WITH POWER SUPPLY M1676 ARE INOP. GROUNDED - YES. REMOVED AND REPLACED EMER LIGHT PWR SUPPLY AT M1676 IAW B737NG AMM33-51-06-960-806 - [SDR ASAA2025032957372](https://openairdocs.org/sdr/ASAA2025032957372), Mar 29, 2025: STRAP. CORRODED. AFT BAG PIT DOOR SURROUND FLOOR STRUCTURE JUST INSIDE DOOR ON AFT END CORRODED AT SCREWHOLE. GROUNDED - YES. REMOVED CORROSION, ORIG THICKNESS=0.100"; REMOVED:0 - [SDR ASAA2025032957313](https://openairdocs.org/sdr/ASAA2025032957313), Mar 29, 2025: WEB. CORRODED. AFT BAG PIT DOOR SURROUND, FLOOR JUST INSIDE DOOR CORRODED ACROSS ENTRYWAY. GROUNDED - YES. REMOVED CORROSSION ORIG. THICKNESS=.050" REMOVED= .014" REMAINING= . - [SDR ASAA2025032957290](https://openairdocs.org/sdr/ASAA2025032957290), Mar 29, 2025: WEB. CORRODED. FORWARD CARGO DOOR SILL HAS CORROSION IN MULTIPLE AREAS. GROUNDED - YES. REMOVED CORROSION ON FWD CARGO DOOR THRESHOLD WEB ORIGINAL MAT=.045 MAT REMOVED .007 RE - [SDR ASAA2025032457018](https://openairdocs.org/sdr/ASAA2025032457018), Mar 24, 2025: FLOOR PANEL. DELAMINATED. MAIN CABIN OVERWING BOX CENTER FLOOR PANEL PN 144A5810-127 HAS DELAMINATION. GROUNDED - YES. REPAIRED MAIN CABIN FLOOR PANEL P/N 144A5810-127 BY PERFORMING A PE - [SDR ASAA2024050549503](https://openairdocs.org/sdr/ASAA2024050549503), May 5, 2024: GASKET. DAMAGED. #2 ENGINE FAILURE ON DEPARTURE BETWEEN 8-9K FEET. ENG FAIL LIGHT ANNUNCIATED. NO AIRFRAME VIBRATIONS FELT. ATTEMPTED XB-RELIGHT, UNSUCCESSFUL RETURNED TO DEPART - [SDR ASAA2024031548438](https://openairdocs.org/sdr/ASAA2024031548438), Mar 15, 2024: POWER SUPPLY. INOPERATIVE. R2 AREA EMERGENCY EXIT LIGHTS ARE INOP. GROUNDED - YES. REMOVED AND REPLACED POWER SUPPLY M1672 IAW B737NG AMM 33-51-06-960-806. OPS CHECK GOOD. - [SDR ASAA2024030848323](https://openairdocs.org/sdr/ASAA2024030848323), Mar 8, 2024: POWER SUPPLY. INOPERATIVE. CUSTOMER WALK: EMERGENCY LIGHTS INOP AT FLIGHT DECK DOOR OVERHEAD AND L-1 DOOR. GROUNDED - YES. REMOVED & REPLACED EMERGENCY EXIT POWER SUPPLY M1675 & INSTALLAT - [SDR ASAA2022090839905](https://openairdocs.org/sdr/ASAA2022090839905), Sep 8, 2022: ACM. ODOR. PACKS CIRCULATE AIR THAT SMELLS LIKE "DIRTY SOCKS" ESPECIALLY AT LOW ALTITUDES AND ON THE GROUND. IT IS WORST AT LOW POWER SETTINGS (IE ON TAXI AND APPROACH) BU - [SDR ASAA2022082239599](https://openairdocs.org/sdr/ASAA2022082239599), Aug 22, 2022: GROUND WIRE. DIRTY. R/H AFT OVERWING EMERGENCY EXIT DIM. GROUNDED - YES. REPLACED LIGHT ASSY AIW 737-900 AMM 33-21-00-960-805. NO HELP. CHECKED RESISTANCE OF CONNECTOR D14724 PIN B - [SDR ASAA2022032137763](https://openairdocs.org/sdr/ASAA2022032137763), Mar 21, 2022: POWER SUPPLY. INOPERATIVE. EMERGENCY LIGHTS AT R1 DOOR INOP GROUNDED - YES. REMOVED AND REPLACED POWER SUPPLY M2816 AND INSTALLATION TEST GOOD IAW B737-900 AMM 33-51-06-960-806 - [SDR ASAA2022030737775](https://openairdocs.org/sdr/ASAA2022030737775), Mar 7, 2022: SKIN. NONE. FLOOR BOARD DELAME P/N 141A5810-729. GROUNDED - YES. REPAIRED FLOOR PANEL 141A5810-729 DAMAGES IAW B737 SRM 53-00-50-2RFLOORBOARD INSTALL ON ALASKA N/R G1653565 - [SDR ASAA2022030737774](https://openairdocs.org/sdr/ASAA2022030737774), Mar 7, 2022: SKIN. NONE. FLOOR BOARD DELAM P/N 141A5810-181. GROUNDED - YES. REPAIRED FLOOR PANEL 141A5810-181 DAMAGED AREA IAW B737 SRM 53-00-50-2R FLOORBOARD INSTALL ON ALASKA N/R G16 - [SDR ASAA2022030637776](https://openairdocs.org/sdr/ASAA2022030637776), Mar 6, 2022: SKIN. NONE. SAD DEFERRAL 12182341 REQUIRES RE-EVALUATION FOR PROER DEFERRAL CODE DUE ITS LOCATION IN THE RVSM EXTRA CRITICAL AREA. ( DEFECT LOCATED AT BS384, 4.5" ABOVE S17 - [SDR ASAA2020091933197](https://openairdocs.org/sdr/ASAA2020091933197), Sep 19, 2020: BOLT. LOOSE. THE COPILOT WINDOW IS VERY DIFFICULT TO OPEN AND CLOSE. FEELS LIKE SOMETHING IS BINDING IN THE TRACK. GROUNDED-YES. FOUND FWD LOWER SPECIAL BOLT BACKING OFF. RE - [SDR ASAA2019061439692](https://openairdocs.org/sdr/ASAA2019061439692), Jun 13, 2019: BATTERY PACK. DISCHARGED. AISLE EMERGENCY LIGHTS AT ROWS 25 AND 29 DEF AND 27 ABC FAIL T/C 78233001 EMERGENCY LIGHTS OPS CHK. GROUNDED - YES. REF B737-900 AMM 33-51-06, REMOVED/REPLACED - [SDR ASAA2017062521203](https://openairdocs.org/sdr/ASAA2017062521203), Jun 25, 2017: LENS. MISSING. EXIT LIGHT COVER MISSING AT 16F. ACFT GROUNDED. INSTALLED THE LENS. OPS GOOD. ## STCs that may be installed (OpenAirDocs) (428, 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 737-990ER) - [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 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 ST12424CH](https://openairdocs.org/stc/ST12424CH): Installation of NGAS Provisions Installation. Astronics Connectivity Systems and Certification Corp - [STC ST02174SE](https://openairdocs.org/stc/ST02174SE): Installation of a B/E Aerospace lavatory. B/E Aerospace, Inc. - FSI. Lists 737-900 Series - [STC ST09927AC](https://openairdocs.org/stc/ST09927AC): Installation of a Gables Audio Management System. L2 Aviation - [STC ST10928SC](https://openairdocs.org/stc/ST10928SC): Installation of an Iridium Communications System. L2 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 ST02329AT-D](https://openairdocs.org/stc/ST02329AT-D): Installation of TCC AERIS FX IFE system. AIRCRAFT RECONFIG TECHNOLOGIES, LLC. Lists 737-900 Series - [STC ST02389AT-D](https://openairdocs.org/stc/ST02389AT-D): Installation of Collins High Frequency Radio. AIRCRAFT RECONFIG TECHNOLOGIES, LLC. Lists 737-900 Series - [STC ST04159AT](https://openairdocs.org/stc/ST04159AT): Installation of PED Power. AIRCRAFT RECONFIG TECHNOLOGIES, LLC - [STC ST04272AT](https://openairdocs.org/stc/ST04272AT): Interior reconfiguration installation. AIRCRAFT RECONFIG TECHNOLOGIES, LLC - [STC ST04392AT](https://openairdocs.org/stc/ST04392AT): Main Cabin Cargo Carry Provisions 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 ST03735NY](https://openairdocs.org/stc/ST03735NY): Installation of a ViaSat KA SATCOM Antenna System. ALOFT AeroArchitects - [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 ST09945AC](https://openairdocs.org/stc/ST09945AC): Installation of the Spacex Starlink Aviation Satcom System. Space Exploration Technologies Corp./Starlink Aviation - [STC ST04831NY](https://openairdocs.org/stc/ST04831NY): Installation of Vortex Control Technologies Finlets. Kilroy Aviation LLC - [STC ST04758NY](https://openairdocs.org/stc/ST04758NY): Installation of single cockpit USB charger. Eirtech Aviation Services Inc - [STC ST09839DS](https://openairdocs.org/stc/ST09839DS): Aircraft G4 Galley Chiller Installation. United Airlines - [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 ST02643LA](https://openairdocs.org/stc/ST02643LA): Installation of Stow Bin Protective Wear Strip. Vogt Aero LLC - [STC ST02746NY](https://openairdocs.org/stc/ST02746NY): Installation of an advertisement container on the bottom of a seat back tray table. Atin OOH LLC - [STC ST03218CH](https://openairdocs.org/stc/ST03218CH): Modify aircraft interior to match standard passenger cofigurations, IAW Global Onboard Partners MDL # 252013-737-MDL-02, Rev. N, dtd 1/4/22 or later FAA approved revisions. Atin OOH LLC - [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 ST02829CH](https://openairdocs.org/stc/ST02829CH): Installation of Row 44 Broadband Antenna System Provisions. Anuvu IFC Corporation - [STC ST02836CH-D](https://openairdocs.org/stc/ST02836CH-D): Installation and activation of a Row 44 Broadband System. Anuvu IFC Corporation - [STC ST03235CH](https://openairdocs.org/stc/ST03235CH): Certification of Compatibility with Wireless Data Technologies. Anuvu IFC Corporation. Lists 737-900 Series - [STC ST03301NY](https://openairdocs.org/stc/ST03301NY): Installation and activation of a new Row 44 Wireless Broadband System. Anuvu IFC Corporation - [STC ST04324CH](https://openairdocs.org/stc/ST04324CH): Installation of a retrofit satellite antenna and associated power supply unit on aircraft previously fitted with the Row 44 Broadband System. Anuvu IFC Corporation - [STC ST00892LA](https://openairdocs.org/stc/ST00892LA): Installation of Emergency Vision Assurance System (EVAS). VisionSafe LLC. Lists 737-900 Series - [STC ST00030IB](https://openairdocs.org/stc/ST00030IB): Installation of Test Tech ELT. APTOZ EHF - [STC ST12200IB](https://openairdocs.org/stc/ST12200IB): Istallation of the AFIRS Edge+ system. FLYHT Aerospace Solutions Ltd - [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 ST11396DS](https://openairdocs.org/stc/ST11396DS): Installation of an Avionica aviONS (Onboard Network System). Aircraft Systems and Manufacturing Inc - [STC ST01335LA](https://openairdocs.org/stc/ST01335LA): Installation of a reinforced cockpit door. Safran Cabin Inc. Lists 737-900 Series - [STC ST01492LA](https://openairdocs.org/stc/ST01492LA): Installation of Galley G3A and 6A. Safran Cabin Inc. Lists 737-900 Series - [STC ST01783LA](https://openairdocs.org/stc/ST01783LA): Installation of a Closet, P/N 501227-1. Safran Cabin Inc. Lists 737-900 Series - [STC ST02081LA](https://openairdocs.org/stc/ST02081LA): Installation of Divider and Curtain Assembly. Safran Cabin Inc. Lists 737-900 Series - [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 ST02172SE](https://openairdocs.org/stc/ST02172SE): Installation of new ovens. B/E Aerospace Inc. - FSI - [STC ST09865AC](https://openairdocs.org/stc/ST09865AC): Installation of Panasonic FlightLink. L2 Aviation - [STC ST04798NY](https://openairdocs.org/stc/ST04798NY): AAR Engineering Services Seat Re-pitch. Delta Engineering Corporation - [STC ST04668CH](https://openairdocs.org/stc/ST04668CH): Installation of Honeywell HCR-25 Cockpit Voice Recorder (CVR). Honeywell Aerospace Inc - [STC ST01479CH](https://openairdocs.org/stc/ST01479CH): Installation of Smiths Industries Flight Management System data bus portable computing device recorder. Amphenol Cable and Interconnect Technologies, Inc. Lists 737-900 Series All 428: https://openairdocs.org/aircraft/N251AK/stcs.md ## Related - Other Boeing 737-990ER aircraft: https://openairdocs.org/model/boeing-737-990er/aircraft.md --- 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.