# N37521: 2019 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-1B28B series](https://openairdocs.org/engine/cfm-international-leap-1b28b-series) (registry code 13124)
- 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: 64497
- Year built: 2019
- Type: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: December 11, 2020
- Certificate issued: December 17, 2020
- Expires: December 31, 2027
- Mode S code: A44916
- Registered owner: [Wilmington Trust Co Trustee](https://openairdocs.org/faa-owner/WILMINGTON%20TRUST%20CO%20TRUSTEE)
- Location: [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington)
- Owner type: Corporation
- Owner's area on the map: 39.7357° N, 75.5321° W: Placed by OpenAirDocs: center of Wilmington, DE, 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=37521
- Page: https://openairdocs.org/aircraft/N37521

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-1B28B 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-1B28B 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 N37521.

## FAA accident and incident reports

None matched to N37521.

## Service difficulty reports (32)

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 CALA2026071617793](https://openairdocs.org/sdr/CALA2026071617793), Jul 14, 2026: BATTERY PACK. DISCHARGED. REMOVED AND REPLACED BATTERY PACKS M1672, M03378 AND M1670. FOR SCEPTRE TRACKING ONLY. REMOVED AND REPLACED BATTERY PACKS M1672, M03378 AND M1670. IAW AMM 33-51
- [SDR CALA2026071417784](https://openairdocs.org/sdr/CALA2026071417784), Jul 14, 2026: BATTERY PACK. NO TEST. DURING EMERGENCY LIGHT TEST, BATTERY PACK M1670 FAILED. REMOVED AND REPLACED BATTERY PACKS M1670 IAW WORK CARD3502921-0000-0037. EMERGENCY LIGHTS TEST GOOD FOR 
- [SDR CALA2026071417782](https://openairdocs.org/sdr/CALA2026071417782), Jul 14, 2026: BATTERY PACK. NO TEST. DURING EMERGENCY LIGHT TEST, BATTERY PACK M03378 FAILED. REMOVED AND REPLACED BATTERY PACKS M03378 IAW WORK CARD3502921-0000-0037. EMERGENCY LIGHTS TEST GOOD FO
- [SDR CALA2026072217938](https://openairdocs.org/sdr/CALA2026072217938), Jul 13, 2026: WINDOW FRAME. CORRODED. FLIGHT DECK L1 WINDOW FRAME, POSSIBLE CORROSION. PERFORMED A REPAIR TO THE L1 WINDOW FRAME A-B & C-D POST, A-C & B-D SILL IAW ECRA 5610-01570 REV A.
- [SDR CALA2026071417760](https://openairdocs.org/sdr/CALA2026071417760), Jul 13, 2026: BEAM. CRACKED. FWD CARGO DOOR, MACHINED BEAM #4 WITH CRACK ON UPPER CHORD AT STA 442. PERFORMED REPAIR TO FRAME P/N 143A6118-9 IAW ECRA 5230-02326, .THE REPAIR ACCOMPLISHED IN
- [SDR CALA2026071417758](https://openairdocs.org/sdr/CALA2026071417758), Jul 13, 2026: FRAME. CRACKED. FWD CARGO DOOR, UPPER FORMED FRAME WITH CRACK ON UPPER CHORD AT BS 477. PERFORMED THE REPAIR TO THE UPPER FRAME IAW ECRA 5230-02326, .THE REPAIR ACCOMPLISHED IN
- [SDR CALA2026071417756](https://openairdocs.org/sdr/CALA2026071417756), Jul 13, 2026: BEAM. CRACKED. FWD CARGO DOOR, UPPER MACHINED BEAM NR 1, WITH CRACK ON UPPER SECTION AT BS 461. PERFORMED THE REPAIR TO THE BEAM IAW ECRA 5230-02326.
- [SDR CALA2026072217942](https://openairdocs.org/sdr/CALA2026072217942), Jul 12, 2026: BEAM. CRACKED. PERFORM AN INSPECTION OF THE REPAIRS ON THE FORWARD CARGO DOOR UPPER FRAME AND BEAM IAW THE PART TWO OF THE LATEST REVISION OF ECRA 5230-02326INITIATED A DIP TO
- [SDR CALA2026072217940](https://openairdocs.org/sdr/CALA2026072217940), Jul 12, 2026: DOOR FRAME. CRACKED. CONTACT ENGINEERING FOR THE INSPECTION REQUIREMENTS ON THE FORWARD CARGO DOOR UPPER FRAME AND BEAM REPAIRS IAW PART TWO OF THE LATEST REVISION OF ECRA 5230-0232
- [SDR CALA2026071217673](https://openairdocs.org/sdr/CALA2026071217673), Jul 6, 2026: SKIN. DENTED. (SUPPORT TASK) FOUND DENTS OUT OF LIMITS AT THE FWD CARGO DOOR EXTERNAL SKIN REQUIRE REPLACEMENT. REMOVED AND REPLACED THE FWD CARGO DOOR EXTERNAL SKIN IAW B737
- [SDR CALA2026062917411](https://openairdocs.org/sdr/CALA2026062917411), Jun 25, 2026: CHANNEL. CORRODED. FOUND DAMAGE CORROSION AT THE FWD CARGO FLOOR STRUCTURE ZEE CHANNEL LH SIDE FROM STA 500B TO STA 500L (REF AAR NR 1000080344) REMOVED AND REPLACED ZEE CHANNEL, 
- [SDR CALA2026061717157](https://openairdocs.org/sdr/CALA2026061717157), Jun 16, 2026: BRACKET. CRACKED. DAMAGED HOLD-OPEN RODS BRACKET IN THE APU DOOR AFT SIDE. R & R NEW BRACKET IN THE APU DOOR AFT SIDE, APPLIED ALODINE AND PRIMER IAW DWG 148A2694 REV- & DWG 148A
- [SDR CALA2026061217058](https://openairdocs.org/sdr/CALA2026061217058), Jun 11, 2026: CHANNEL. CORRODED. FOUND DAMAGE CORROSION AT THE FWD CARGO FLOOR STRUCTURE RT ZEE CHANNEL FROM STA 500A TO STA 500L . REMOVED AND REPLACED RT ZEE CHANNEL BTW BS 500A TO 500L IAW S
- [SDR CALA2026070717571](https://openairdocs.org/sdr/CALA2026070717571), Jun 9, 2026: FLOORBEAM. CORRODED. FOUND DAMAGE CORROSION AT AFT WET AREA FLOORBEAM BS 947 RBL 50 TO BE OUT OF LIMITS , REPAIRED WET AREA FLOORBEAM STA 947 BETWEEN LBL 7.8 TO RBL 55 IAW SRM 53-70
- [SDR CALA2026061016990](https://openairdocs.org/sdr/CALA2026061016990), Jun 9, 2026: CHANNEL. CORRODED. FOUND DAMAGE CORROSION AT THE AFT CARGO LH ZEE CHANNEL STA 727H TO 847. REMOVED AND REPLACED ZEE CHANNEL LH SIDE AT AFT CARGO COMPARTMENT BTW STA 727 TO STA 847
- [SDR CALA2026061016988](https://openairdocs.org/sdr/CALA2026061016988), Jun 9, 2026: FLOOR SUPPORT. CORRODED. FOUND CORROSION AT THE MID LOWER AFT BULKHEAD SUPPORT PANEL AT STA 500L. REMOVED AND REPLACED LOWER RAIL ASSY OF MID LOWER AFT BULKHEAD PANEL AT STA. 500L. IAW 
- [SDR CALA2026061016986](https://openairdocs.org/sdr/CALA2026061016986), Jun 9, 2026: CHANNEL. CORRODED. FOUND DAMAGE CORROSION AT THE AFT CARGO RH ZEE CHANNEL BTW STA 727 TO STA 767. REMOVED AND INSTALLED NEW ZEE CHANNEL ON AFT CARGO BTW STA 727 TO STA 767 IAW B73
- [SDR CALA2026061016984](https://openairdocs.org/sdr/CALA2026061016984), Jun 9, 2026: FLOORBEAM. CORRODED. CORROSION ON AFT WET AREA FLOOR SUPPORT AT STA 950 BTW LBL 26 TO LBL 50, REQUIRE EVALUATION. REMOVED AND REPLACED FLOOR SUPPORT ON AFT WET AREA STA 950 BTW LBL 
- [SDR CALA2026051416231](https://openairdocs.org/sdr/CALA2026051416231), May 10, 2026: UNKNOWN. UNKNOWN. PAX REPORTS A NOTABLE AMOUNT OF WATER CAME OUT OF THE HANDLE FOR THE OVERWING EMERGENCY EXIST AT 20F. OCCURRED ON DESCENT THROUGH APPROXIMATELY FL180. PERFORMED
- [SDR CALA2026041315333](https://openairdocs.org/sdr/CALA2026041315333), Apr 12, 2026: SKIN. DENTED. SMALL DENT REPORTED BY CATERING PICTURED BELOW.DAMAGE ON DOOR 2 L LOCATION OF DAMAGE IS AFT OF 2 L DOOR ABOUT 18 INCHES AT STA 1010 AND S-13L FOUND TO BE 2 IMPA
- [SDR CALA2025110610943](https://openairdocs.org/sdr/CALA2025110610943), Nov 3, 2025: UNKNOWN. ODOR. JET FUEL ODOR IN AFT GALLEY AREA DURING TAKEOFF AND LANDING. PERFORMED APU DRAIN MAST INSPECTION IN REF AMM 49-16-11. NO FUEL LEAK DETECTED PERFORMED SMOKE OR F
- [SDR CALA2025100209566](https://openairdocs.org/sdr/CALA2025100209566), Oct 1, 2025: MEGAPHONE. DAMAGED. FWD CABIN MEGAPHONE TEST FUNCTION, DAMAGED, MEGAPHONE STUCK IN TEST. REPLACED FWD MEGAPHONE IAW AMM 25-64-00-710-801.
- [SDR CALA2025041603891](https://openairdocs.org/sdr/CALA2025041603891), Apr 15, 2025: BOLT. MISSING. R2 SLIDE FABRIC LOOSE. INSTALLED MISSING HARDWARE ON SLIDE LANYARD. REF. IPC 25-66-01-03 PARTS USED: 00-0595-3-4727,QTY :1 00-0593-3-2150,QTY :1 INSTALLED MISSI
- [SDR CALA2025032103066](https://openairdocs.org/sdr/CALA2025032103066), Mar 19, 2025: SLIDE. FAULTY. DOOR L2 ESCAPE SLIDE ASSY REPLACED ON JC 43-2566-1-0001 WITH RII INSPECTION ACCOMPLISHED. LOG PAGE IS TO CAPTURE. ROTABLE PARTS INFORMATION. UPDATED.PARTS USED:
- [SDR CALA2025032103065](https://openairdocs.org/sdr/CALA2025032103065), Mar 19, 2025: SCREW. SHORT. INSTALLATION OF THE ESCAPE SLIDE PACK - L2 DOOR SLIDE PACK ASSY, LH ATTACHMENT BOLT IS INCORRECT LENGTH (TOO SHORT) REF: IPC 25-66-01-03. INSTALLED CORRECT AFT 
- [SDR CALA2025031702843](https://openairdocs.org/sdr/CALA2025031702843), Mar 13, 2025: OVEN. SPARKS. OVEN SMOKING OR SPARKING FORWARD RIGHT GALLEY G2 OUTBD OVEN HAD STRONG EL EC/WIRNG BURNING ODOR W/ O ITEMS INSIDE. NO SMOKE. CB-S PULLED-BOTH OV REQUESTING NEF 
- [SDR CALA2024101400832](https://openairdocs.org/sdr/CALA2024101400832), Oct 12, 2024: FAN. FAULTED. STRONG ELEC SMELL IN CABIN ROWS 22-27 QRH RAN AT FL350 THEN DI VERT TO DENFLIGHT AND CABIN CREWS COMPLIED WITH SMOKE ODOR QUESTIONAIRE SEE PICS FIM 21-00- TASK 
- [SDR CALA2022102402912](https://openairdocs.org/sdr/CALA2022102402912), Oct 22, 2022: NONE. NONE. JETBRIDGE SCRATCHED PAINT NEXT TO DOOR 1L METAL SHOWING REF FIGURE 103 SECTION B, AC CAN BE OPERATED FOR 50 FLT HOURS PER SRM LIMITS. INSPECTED DAMAGE PER SRM 5
- [SDR CALA2022020700341](https://openairdocs.org/sdr/CALA2022020700341), Feb 7, 2022: WARNING MESSAGE. ACTIVATION ERROR. WHEN SETTING TO THRUST WE RECIEVED THE TO CONFIG WARNING. CONTACT TOMC TO UNLOCK FOR SIGNOFF. UNLOCKING FOR SIGNOFF REF LOG. 7928334 FOR PSEU R/R. PERFORMED TAK
- [SDR CALA2022020400320](https://openairdocs.org/sdr/CALA2022020400320), Feb 3, 2022: WARNING SYSTEM. FALSE INDICATION. TAKE OFF WARNING HORN SOUNDING AT ALL TIMES...CYCLED FLIGHT CONTROLS, PARKING BRAKE, STAB TRIM....NO HELP ACP TS PER IFM 31-50-00-810-803. MAINTENANCE MESSAGE F
- [SDR CALA2022012600242](https://openairdocs.org/sdr/CALA2022012600242), Jan 26, 2022: TAIL CONE. DAMAGED. POSSIBLE TAIL STRIKE PERFORMED TASK 05-51-32-210-801 AND : TAIL SKID INSPECTION, TASK 05-51-32-210-802. NO EVIDANCE OF STRIKE FOUND. SHOE IS CLEAN AND WITHOUT S
- [SDR CALA2021080901301](https://openairdocs.org/sdr/CALA2021080901301), Aug 9, 2021: COVER. LOOSE. REVIEW ALL DISCREPANCIES RECORDED AND INITIATE SFR/SDR REPORTS AS REQUIRED, PER GMM 04-20-05 AND GMM 04-20-16. - PAX SEAT EPL SHROUD LOOSE ON AISLE SEATS, 8,10,

## 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/N37521/stcs.md

## Earlier aircraft with N37521

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N37521 before.

- [Cancelled 1976-06-10](https://openairdocs.org/deregistered/N37521-1976-06-10): Douglas DC-6, S/N 43010, built 1947. Sale reported. Owner: [Oklahoma City, OK](https://openairdocs.org/faa-place/OK/Oklahoma%20City)

## Related

- Other Boeing 737-9 aircraft: https://openairdocs.org/model/boeing-737-9/aircraft.md
- The CFM International LEAP-1B28B series engine: https://openairdocs.org/engine/cfm-international-leap-1b28b-series.md

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