# N27509: 2018 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: 43443
- Year built: 2018
- Type: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: November 28, 2018
- Certificate issued: November 29, 2018
- Expires: November 30, 2028
- Mode S code: A2BB89
- Registered owner: [United Airlines Inc](https://openairdocs.org/faa-owner/UNITED%20AIRLINES%20INC)
- Location: [Chicago, IL](https://openairdocs.org/faa-place/IL/Chicago)
- Owner type: Corporation
- Owner's area on the map: 41.8813° N, 87.6375° W: Placed by OpenAirDocs at the center of ZIP code 60606, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=27509
- Page: https://openairdocs.org/aircraft/N27509

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 N27509.

## FAA accident and incident reports

None matched to N27509.

## Service difficulty reports (5)

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 CALA2026092219654](https://openairdocs.org/sdr/CALA2026092219654), Sep 19, 2026: POWER SUPPLY. INOPERATIVE. R2 DOOR EMERGENCY LIGHTS INOPERATIVE. REPLACED THE POWER SUPPLY (M1672) IAW AMM 33-51-06 -960-803. OP CHECKED GOOD.
- [SDR CALA2026020213489](https://openairdocs.org/sdr/CALA2026020213489), Jan 29, 2026: WINDOW FRAME. DAMAGED. LOUD SQUEALING COMING FROM FO FRONT WINDOW AREA. DEBRIEFED CREW SQUEALING COMING FROM RIGHT SIDE OF FO FRONT WINDOW IMAGE LABOR UPDATE R2 WINDOW LEAKING FROM TH
- [SDR CALA2025012301976](https://openairdocs.org/sdr/CALA2025012301976), Jan 19, 2025: LIGHT. MALFUNCTIONED. SIDEWALL LIGHT WILL NOT TURN OFF 11F SIDEWALL LIGHT AT SEAT 11F IS STROBING. LIGHT IS NIS LAS. PULLED AND COLLARED C/B PANEL P92 C/B E-11 WDO LT RIGHT. CLOSED A
- [SDR CALA2022051301233](https://openairdocs.org/sdr/CALA2022051301233), May 13, 2022: SHROUD. LOOSE. EPL SHROUD AT PAX SEAT 35C IS LOOSE. SECURED EPL SHROUD IAW CMM 25-21-65, EPL OPS. CHK''S. GOOD.
- [SDR CALA2022030300559](https://openairdocs.org/sdr/CALA2022030300559), Mar 3, 2022: SHROUD. LOOSE. COACH SEATS 11C AND 12C, EPL SHROUDS ARE LOOSE. SECURED IAW CMM 25-21-65, EPL OPS. CHK''S. GOOD

## Service difficulty reports on N27509 not matched to an aircraft (87, newest 50)

They name N27509, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [SDR L1GA200000316](https://openairdocs.org/sdr/L1GA200000316), Oct 26, 2000: SKIN. DELAMINATED. LEFT I/B FLAP T/E DELAMINATED 5 INCHES.
- [SDR L1GA200000312](https://openairdocs.org/sdr/L1GA200000312), Oct 14, 2000: HARNESS. BURNED. DURING AFT CENTER BOOST PUMP REM FOUND EVIDENCE OF ARCING IN BOOST PUMP HARNESS CONNECTION. ALSO EVIDENCE OF ARCING DAMAGE ON 2 PINS IN ELEC CONN-REM. REPLACED 
- [SDR L1GA200000244](https://openairdocs.org/sdr/L1GA200000244), Aug 12, 2000: A/C PACK. DAMAGED. AFTER T/O, LT AC PACK OVERHEAT. RETURNED TO DAL, SMOKE IN CABIN AND COCKPIT AND EMERGENCY DECLARED. RESET LT INSTRUMENT XFORMER C/B OPS CK ON LT PACK NORMAL. CR
- [SDR L1GA200000179](https://openairdocs.org/sdr/L1GA200000179), Jul 21, 2000: PUSHROD. DIRTY. 921 GEAR UNSAFE LIGHT ON DEPARTURE FLT 1 DAT-LAX. RETURNED TO FIELD. GEAR DAMAGE INCURRED, REQ FERRY TO AAR OK CITY, R2 DOORS AND BYPASS VALVE AS PRECAUTION RET
- [SDR L1GA200000178](https://openairdocs.org/sdr/L1GA200000178), Jul 19, 2000: STRUCTURE. TORN. FLT 11 TO LAX, AFTER T/O HEARD BANGING NOISE OUTSIDE AIRCRAFT. RETURNED TO DAL. FOUND R1 DOOR TRIM TORN, PIEICE STICKING OUT OF DOOR. TRIMMED OFF, ACFT RETURNED
- [SDR L1GA200000175](https://openairdocs.org/sdr/L1GA200000175), Jul 7, 2000: DOOR SEAL. TORN. FLT 1 TO LA ACFT 921 AIRCREW HEARD FLAPPING NOISE RT FWD OUTSIDE OF FUSELAGE NEAR RT FWD SERVICE DOOR. ON RETURN FOUND INNER DOOR SEAL STICKING OUT. SECURED
- [SDR L1GA200000174](https://openairdocs.org/sdr/L1GA200000174), Jul 7, 2000: UPLOCK SWITCH. MALFUNCTIONED. FLT 1 TO LA RETURNED TO FIELD, NLG DOWN LOCK LIGHT DID NOT ILLUMINATE. R&R NLG UP & DOWNLOCK SWITCHES, RETRACT 2 TIMES RET TO SERVICE
- [SDR L1GA200000130](https://openairdocs.org/sdr/L1GA200000130), May 31, 2000: PUMP. FAILED. ACFT ABORTED TO NR 1 ENGINE POWER REDUCED TO 80 PERCENT N2 W/O THROTTLE INPUT. NR 1 ENGINE FUEL PUMP REPLACED.
- [SDR L1GA200000127](https://openairdocs.org/sdr/L1GA200000127), May 15, 2000: OXYGEN BOTTLE. CONTAMINATED. BAD SMELL FROM CREW O2 BOTTLE, R2 BOTTLE. INSPECTION RESULTS FOUND CHLORINE AND FLUORINE VAPORS. CONSISTANT WITH VAPORS FOUND IF BURN-OUT OF VALVE SEAT OCCURRED
- [SDR L1GA200000172](https://openairdocs.org/sdr/L1GA200000172), May 10, 2000: STOP. CORRODED. LEVEL 2 CORROSION AFT CARGO DOOR AFT STOPS PADS HARDWARE.
- [SDR L1GA200000171](https://openairdocs.org/sdr/L1GA200000171), May 10, 2000: STRAP. CUT. GOUGE AND CUT ON STRAP ON RT AFT STEP IN AFT ACCESS COMP AT STATION 1155.
- [SDR L1GA200000170](https://openairdocs.org/sdr/L1GA200000170), May 10, 2000: FASTENER. CORRODED. CORROSION LOCATED ON ELEVATOR PANEL 3624A UPPER I/B FASTENERS.
- [SDR L1GA200000169](https://openairdocs.org/sdr/L1GA200000169), May 10, 2000: FLOORBOARD. CRACKED. CRACK ON CABIN FLOOR PANEL L/E STATION 237 O/B OF X44L.
- [SDR L1GA200000098](https://openairdocs.org/sdr/L1GA200000098), May 10, 2000: FLOORBOARD. CRACKED. CABIN FLOOR PANEL I/B EDGE CRACKED AT STATION 351 X24L TO X44L.
- [SDR L1GA200000097](https://openairdocs.org/sdr/L1GA200000097), May 10, 2000: SKIN. CRACKED. CRACK AT LEFT ELEVATOR LEADING EDGE LOWER SKIN EDGE AT XE 49.7
- [SDR L1GA200000096](https://openairdocs.org/sdr/L1GA200000096), May 10, 2000: FLOORBOARD. BROKEN. OUTBOARD CABIN FLOOR PANEL AT STATION 756 X44L TO X54L BROKEN.
- [SDR L1GA200000095](https://openairdocs.org/sdr/L1GA200000095), May 10, 2000: FITTING. CORRODED. CORROSION WAS FOUND ON THE RIGHT FLAP INBOARD HINGE FITTING ASSEMBLY.
- [SDR L1GA200000094](https://openairdocs.org/sdr/L1GA200000094), May 10, 2000: FLOORBOARD. PUNCTURED. A .875 INCH DIAMETER PUNCTURE AND CRACK WAS FOUND IN THE FLOOR PANEL AT FS 389 LBL 48.
- [SDR L1GA200000093](https://openairdocs.org/sdr/L1GA200000093), May 10, 2000: FLOORBOARD. CRACKED. FLOORBOARD PANEL NUMBER 65 WAS FOUND TO HAVE A PUNCTURE AND CRACK.
- [SDR L1GA200000092](https://openairdocs.org/sdr/L1GA200000092), May 10, 2000: FLOORBOARD. PUNCTURED. A 1.5 INCH PUNCTURE WAS FOUND IN THE FLOORBOARD AT FS 455 RBL 12.
- [SDR L1GA200000091](https://openairdocs.org/sdr/L1GA200000091), May 10, 2000: FLOORBOARD. CRACKED. A 3 INCH SECTION OF THE FOWARD INBOARD CORNER OF PANEL NUMBER 4221A WAS CRACKED AND TORN AT STATION 133BL 30 LEFT.
- [SDR L1GA200000090](https://openairdocs.org/sdr/L1GA200000090), May 10, 2000: FLOORBOARD. CORRODED. CORROSION WITH A PUNCTURE WAS FOUND ON THE CABIN FLOOR PANEL NUMBER 26 BETWEEN X54 LEFT AT STATION 275.
- [SDR L1GA200000089](https://openairdocs.org/sdr/L1GA200000089), May 10, 2000: FLOORBOARD. CRACKED. A CRACK WAS FOUND ON THE CABIN FLOOR PANEL NUMBER 38 AT STATION 389 X44 LEFT TO 54 LEFT.
- [SDR L1GA200000088](https://openairdocs.org/sdr/L1GA200000088), May 10, 2000: FAIRING. CRACKED. A CRACK WAS FOUND ON THE LEFT WING TRAILING EDGE FLAP INBOARD HINGE AFT FAIRING, OUTBOARD LEADING EDGE TRIM STRIP.
- [SDR L1GA200000087](https://openairdocs.org/sdr/L1GA200000087), May 10, 2000: PANEL. CRACKED. A CRACK WAS FOUND ON THE NUMBER 1 ENGINE PYLON PANEL 8210A FROM THE EDGE TO THE FASTENER HOLE.
- [SDR L1GA200000086](https://openairdocs.org/sdr/L1GA200000086), May 10, 2000: PAN. CRACKED. A CRACK WAS FOUND ON THE L-1 DOOR PAN 1 INCH ABOVE THE NR 8 STOP.
- [SDR L1GA200000085](https://openairdocs.org/sdr/L1GA200000085), May 10, 2000: SKIN. CRACKED. A GOUGE AND CRACK WERE FOUND ON THE I/B EDGE OF THE CONDITIONED AIR CONNECTOR OPENING BELOW THE NR 2 ENGINE AREA.
- [SDR L1GA200000084](https://openairdocs.org/sdr/L1GA200000084), May 10, 2000: STRINGER. CRACKED. THE STRINGER AT 17 LEFT AT FRAME FS 965 WAS FOUND CRACKED.
- [SDR L1GA200000083](https://openairdocs.org/sdr/L1GA200000083), May 10, 2000: BRACKET. CRACKED. THE AFT CARGO BARRIER DOOR MOUNT BRACKET INBOARD SIDE WAS CRACKED ON THE CENTER MOUNT.
- [SDR L1GA200000082](https://openairdocs.org/sdr/L1GA200000082), May 10, 2000: AIR DUCT. CHAFED. THE APU AIR INLET DOOR CORNERS WERE FOUND CHAFING, TORN AND DEFORMED.
- [SDR L1GA200000074](https://openairdocs.org/sdr/L1GA200000074), May 10, 2000: BULKHEAD. CRACKED. CRACK FOUND ON THE AFT BULKHEAD DOOR FOWARD SKIN RIGHT UPPER LIGHTENING HOLE EDGE.
- [SDR L1GA200000081](https://openairdocs.org/sdr/L1GA200000081), May 10, 2000: SUPPORT BRACKET. CUT. A CUT WAS FOUND ON THE AFT CARGO FOWARD BULKHEAD WALL LINER SUPPORT BRACE.
- [SDR L1GA200000080](https://openairdocs.org/sdr/L1GA200000080), May 10, 2000: FLOORBOARD. CRACKED. THE RIGHT OUTBOARD CABIN FLOORBOARD PANEL AFT END WAS CRACKED AND DEFORMED.
- [SDR L1GA200000079](https://openairdocs.org/sdr/L1GA200000079), May 10, 2000: ANTENNA. CORRODED. CORROSION WAS FOUND ON THE LOWER VHF ANTENNA.
- [SDR L1GA200000078](https://openairdocs.org/sdr/L1GA200000078), May 10, 2000: SKIN. CRACKED. DENT WITH CREASE WAS FOUND ON THE LOWER FUSELAGE SKIN FOWARD OF THE TAIL JACK PAD.
- [SDR L1GA200000077](https://openairdocs.org/sdr/L1GA200000077), May 10, 2000: INTERCOSTAL. CRACKED. THE INTERCOSTAL ATTACH HOLES AT STRUCTURE 7R BETWEEN STATION 513 AND 522 WERE DEFORMED AND CRACKED.
- [SDR L1GA200000125](https://openairdocs.org/sdr/L1GA200000125), May 10, 2000: FLOORBOARD. CRACKED. CRACK ON THE OUTBOARD LEFT FLOOR PANEL AT STATION 832.
- [SDR L1GA200000114](https://openairdocs.org/sdr/L1GA200000114), May 10, 2000: FLOORBEAM. MISREPAIRED. INTERFERENCE FROM EXISTING REPAIR STATION 980 FLOORBEAM BL 21 TO 35 LT. SPLICED IN NEW FLOORBEAM CAP TO AVOID MOD INTERFERENCE-AFT LAV RECONFIGURATION.
- [SDR L1GA200000113](https://openairdocs.org/sdr/L1GA200000113), May 10, 2000: SKIN. CORRODED. CORROSION AT FS 1040 LEFT SIDE OF FUSELAGE 12 INCH FLANGE.
- [SDR L1GA200000112](https://openairdocs.org/sdr/L1GA200000112), May 10, 2000: FLOORBOARD. CORRODED. LEVEL 2 CORROSION AND CRACKS CO-PILOTS FLOORBOARD UNDER RUDDER PEDALS.
- [SDR L1GA200000111](https://openairdocs.org/sdr/L1GA200000111), May 10, 2000: FRAME. DAMAGED. HOLE IN FOWARD RIGHT SIDE RIGHT UPPER CORNER OF THE AFT PRESSURE BULKHEAD.
- [SDR L1GA200000110](https://openairdocs.org/sdr/L1GA200000110), May 10, 2000: FLOORBOARD. CRACKED. FLOOR PANEL NUMBER 62 CRACKED.
- [SDR L1GA200000115](https://openairdocs.org/sdr/L1GA200000115), May 10, 2000: SKIN. CORRODED. LEVEL 2 CORROSION RT ELEV O/B WRAP AROUND HARDWARE.
- [SDR L1GA200000109](https://openairdocs.org/sdr/L1GA200000109), May 10, 2000: FLOORBOARD. BROKEN. FLOOR PANEL NUMBER 67 CORNER BROKEN OFF.
- [SDR L1GA200000108](https://openairdocs.org/sdr/L1GA200000108), May 10, 2000: FLOORBOARD. CORRODED. CORROSION ON NR 13 CABIN FLOOR PANEL AT STATION 148 APPROX X14.
- [SDR L1GA200000107](https://openairdocs.org/sdr/L1GA200000107), May 10, 2000: PLATE. CORRODED. CORROSION FOUND AT FOWARD CARGO AREA RIGHT SIDE AT STATION 370.
- [SDR L1GA200000106](https://openairdocs.org/sdr/L1GA200000106), May 10, 2000: FLOORBEAM. MISREPAIRED. INTERFERENCE FROM EXISTING REPAIR AT FS 996 BL 32 TO 43L SPLICED NEW SECTION OF FLOORBEAM CAP TO AVOID MOD INTERFERENCE. REF MOD IS AFT LAV COMPLEX FOR INTERIOR
- [SDR L1GA200000105](https://openairdocs.org/sdr/L1GA200000105), May 10, 2000: FLOORBOARD. PUNCTURED. FLOOR PANEL PUNCTURED AT STATION 670 BL 24L.
- [SDR L1GA200000104](https://openairdocs.org/sdr/L1GA200000104), May 10, 2000: FLOORBOARD. PUNCTURED. FLOOR PANEL PUNCTURED 2 PLACES AT STATION 240 BL 44L TO BL 54R.
- [SDR L1GA200000103](https://openairdocs.org/sdr/L1GA200000103), May 10, 2000: FLOORBOARD. CORRODED. CORROSION FOUND ON CABIN FLOOR PANEL NR 14 AT STATION 148 TO 160 X20R TO X34R.

All 87: https://openairdocs.org/aircraft/N27509/unmatched-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/N27509/stcs.md

## Earlier aircraft with N27509

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N27509 before.

- [Cancelled 1948-10-13](https://openairdocs.org/deregistered/N27509-1948-10-13): Taylorcraft BL-65, S/N 2151. Owner: [Mcdaniel K](https://openairdocs.org/faa-owner/MCDANIEL%20K)

## 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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