# N438US: 1990 Boeing 737-4B7

- Status: Valid registration
- Airframe: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (registry code 138449C, 149 seats)
- Engine: [CFM International CFM56 series](https://openairdocs.org/engine/cfm-international-cfm56-series) (registry code 13802)
- Serial number: 24560
- Year built: 1990
- Type: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: April 24, 1990
- Certificate issued: May 1, 2024
- Expires: May 31, 2031
- Mode S code: A542A9
- Registered owner: [Eastern 737 Asset Holdings LLC](https://openairdocs.org/faa-owner/EASTERN%20737%20ASSET%20HOLDINGS%20LLC)
- Location: [Kansas City, MO](https://openairdocs.org/faa-place/MO/Kansas%20City)
- Owner type: LLC
- Owner's area on the map: 39.2746° N, 94.7266° W: Placed by OpenAirDocs at the center of ZIP code 64153, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=438US
- Page: https://openairdocs.org/aircraft/N438US

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 CFM56 model are included.

## ADs that may apply (OpenAirDocs): 55 in force

### Matched by airframe (Boeing 737-4B7)

None in force.

### Matched by engine (CFM International CFM56 series)

- [AD 2023-05-05](https://openairdocs.org/ad/2023-05-05): Turbine Engine Compressor Section · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/3 and 98 more. Effective May 10, 2023
- [AD 2022-02-03](https://openairdocs.org/ad/2022-02-03): Turbine Engine Accessory Drive · CFM International CFM56-3, CFM56-3B, CFM56-3C and 34 more. Effective Mar 22, 2022
- [AD 2021-16-08](https://openairdocs.org/ad/2021-16-08): Turbine Section · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/P and 55 more. Effective Sep 28, 2021
- [AD 2018-26-01](https://openairdocs.org/ad/2018-26-01): Turbine Engine Compressor Section · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective Jan 10, 2019
- [AD 2018-09-51](https://openairdocs.org/ad/2018-09-51): Engine · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective Jun 7, 2018
- [AD 2017-14-08](https://openairdocs.org/ad/2017-14-08): Turbine Engine Compressor Section · CFM International CFM56-3, CFM56-3B and CFM56-3C. Effective Aug 18, 2017
- [AD 2017-05-09](https://openairdocs.org/ad/2017-05-09): Accessory Gearboxes · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/3 and 33 more. Effective Apr 13, 2017
- [AD 2016-14-10](https://openairdocs.org/ad/2016-14-10): High-pressure turbine (HPT) disks · CFM International CFM56-3, CFM56-3B and CFM56-3C with STC SE00034EN. Effective Aug 9, 2016
- [AD 2016-02-04](https://openairdocs.org/ad/2016-02-04): Turbine rear frames (TRFs) · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/3 and 33 more. Effective Mar 1, 2016
- [AD 2015-18-04](https://openairdocs.org/ad/2015-18-04): 73-tooth gearshaft located in the engine accessory gearbox (AGB) · CFM International CFM56-3, CFM56-7B20, CFM56-7B20/2 and 47 more. Effective Oct 20, 2015
- [AD 2015-04-02](https://openairdocs.org/ad/2015-04-02): Dual engine thrust instability event · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective Mar 31, 2015
- [AD 2013-14-06](https://openairdocs.org/ad/2013-14-06): Hydro-mechanical unit (HMU) fuel control · CFM International CFM56-5, CFM56-5B1, CFM56-5B1/2P and 34 more. Effective Sep 3, 2013
- [AD 2012-02-03](https://openairdocs.org/ad/2012-02-03): Engine · CFM International CFM56-5B1/3, CFM56-5B2/3, CFM56-5B3/3 and 8 more. Effective Mar 15, 2012
- [AD 2010-13-09](https://openairdocs.org/ad/2010-13-09): Stage 3 low-pressure turbine (LPT) · CFM International CFM56-5, CFM56-5-A1/F, CFM56-5A4 and 88 more. Effective Jul 26, 2010
- [AD 2010-12-03](https://openairdocs.org/ad/2010-12-03): Fan blades · CFM International CFM56-3 and CFM56-3B. Effective Jul 13, 2010
- [AD 2010-09-14](https://openairdocs.org/ad/2010-09-14): Exhaust gas temperature (EGT) · CFM International CFM56-5B1/2P, CFM56-5B1/P, CFM56-5B2/2P and 16 more. Effective Jun 8, 2010
- [AD 2010-01-05](https://openairdocs.org/ad/2010-01-05): LP turbine rear frames · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 25 more. Effective Feb 18, 2010
- [AD 2009-18-01](https://openairdocs.org/ad/2009-18-01): LP turbine rear frames · CFM International CFM56-5B1/3, CFM56-5B1/P, CFM56-5B2/3 and 19 more. Effective Oct 1, 2009
- [AD 2009-11-02](https://openairdocs.org/ad/2009-11-02): HPC 4-9 spools · CFM International CFM56-2, CFM56-2A, CFM56-2B and 109 more. Effective Jun 23, 2009
- [AD 2008-03-09](https://openairdocs.org/ad/2008-03-09): Low pressure turbine rear frames (TRFs) · CFM International CFM56-7B18, CFM56-7B20, CFM56-7B22 and 10 more. Effective Mar 10, 2008
- [AD 2007-24-04](https://openairdocs.org/ad/2007-24-04): Low pressure turbine (LPT) · CFM International CFM56-5C4/1. Effective Dec 6, 2007
- [AD 2007-03-15](https://openairdocs.org/ad/2007-03-15): Exhaust gas temperature (EGT) harness · CFM International CFM56-5, CFM56-5B1, CFM56-5B1/2P and 34 more. Effective Mar 19, 2007
- [AD 2006-26-01](https://openairdocs.org/ad/2006-26-01): Fuel filters · CFM International CFM56-2, CFM56-2A, CFM56-2B and 93 more. Effective Jan 3, 2007
- [AD 2005-10-05](https://openairdocs.org/ad/2005-10-05): Air turbine starters · CFM International CFM56-5, CFM56-5B1, CFM56-5B1/2P and 50 more. Effective Jun 14, 2005
- [AD 97-09-02 R3](https://openairdocs.org/ad/97-09-02-R3): High pressure turbine rotor (HPTR) front shafts · CFM International CFM56-5C2, CFM56-5C3/G and CFM56-5C4. Effective Oct 14, 2004
- [AD 2004-10-13](https://openairdocs.org/ad/2004-10-13): Service main fuel pumps · CFM International CFM56-3, CFM56-5, CFM56-5-A1/F and 4 more. Effective Jun 24, 2004
- [AD 2002-22-12](https://openairdocs.org/ad/2002-22-12): Titeflex hoses · BAE Systems ATP, Avro 146-RJ100A, Avro 146-RJ70A and 122 more. Effective Dec 13, 2002
- [AD 2002-16-18](https://openairdocs.org/ad/2002-16-18): Low pressure turbine (LPT) nozzle segments · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/P and 33 more. Effective Sep 18, 2002
- [AD 2002-13-03](https://openairdocs.org/ad/2002-13-03): Turbofan Engines · CFM International CFM56-2, CFM56-2A, CFM56-2B and 55 more. Effective Aug 1, 2002
- [AD 2002-02-13](https://openairdocs.org/ad/2002-02-13): Magnetic Drain Plug · CFM International CFM56-5, CFM56-5-A1/F, CFM56-5A4 and 33 more. Effective Mar 21, 2002
- [AD 2001-11-05](https://openairdocs.org/ad/2001-11-05): No. 4 Bearings · CFM International CFM56-2, CFM56-2B, CFM56-3 and 45 more. Effective Jun 11, 2001
- [AD 2001-09-17](https://openairdocs.org/ad/2001-09-17): Fuel Manifold and CJ9L Harness · CFM International CFM56-5C2, CFM56-5C2/4, CFM56-5C2/F and 13 more. Effective May 14, 2001
- [AD 2001-04-06](https://openairdocs.org/ad/2001-04-06): Fan Disk · CFM International CFM56-3, CFM56-3B and CFM56-3C. Effective Apr 4, 2001
- [AD 2001-02-12](https://openairdocs.org/ad/2001-02-12): On-Wing Torque Inspection · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B22 and 11 more. Effective Feb 14, 2001
- [AD 2000-15-01](https://openairdocs.org/ad/2000-15-01): Fuel Leakage · CFM International CFM56-2, CFM56-2A, CFM56-2B and 39 more. Effective Oct 2, 2000
- [AD 2000-05-22](https://openairdocs.org/ad/2000-05-22): CFM International CFM56-2, CFM56-2A, CFM56-2B and 3 more. Effective May 2, 2000
- [AD 99-06-16](https://openairdocs.org/ad/99-06-16): High Pressure Turbine Rotor (HPTR) Front Air Seal · CFM International CFM56-5, CFM56-5-A1/F, CFM56-5A4 and 3 more. Effective Apr 21, 1999
- [AD 98-21-23](https://openairdocs.org/ad/98-21-23): Electronic Engine Control · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B22 and 10 more. Effective Nov 2, 1998
- [AD 98-19-20](https://openairdocs.org/ad/98-19-20): Hydromechanical Unit · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B22 and 7 more. Effective Oct 7, 1998
- [AD 98-14-51](https://openairdocs.org/ad/98-14-51): Accessory Gearbox · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B22 and 10 more. Effective Oct 1, 1998
- [AD 98-19-10](https://openairdocs.org/ad/98-19-10): Accessory Gearbox · CFM International CFM56-3, CFM56-3B and CFM56-3C. Effective Sep 28, 1998
- [AD 98-12-32](https://openairdocs.org/ad/98-12-32): High Pressure Turbine Rotor Disks · CFM International CFM56-2, CFM56-2A, CFM56-2B and 3 more. Effective Jul 20, 1998
- [AD 98-10-11](https://openairdocs.org/ad/98-10-11): Accessory Gearbox · CFM International CFM56-3, CFM56-3B, CFM56-3C and 31 more. Effective Jun 3, 1998
- [AD 98-07-02](https://openairdocs.org/ad/98-07-02): Air/oil Seal · CFM International CFM56-3, CFM56-3B and CFM56-3C. Effective Mar 30, 1998
- [AD 98-02-04](https://openairdocs.org/ad/98-02-04): Low Pressure Turbine Case · CFM International CFM56-5B1/2P, CFM56-5B2/2P, CFM56-5B3/2P and 1 more. Effective Mar 23, 1998
- [AD 89-23-06 R1](https://openairdocs.org/ad/89-23-06-R1): Magnetic Chip Detector · CFM International CFM56-2, CFM56-2A, CFM56-3 and 8 more. Effective Jan 28, 1998
- [AD 97-08-01](https://openairdocs.org/ad/97-08-01): Fan Disks · CFM International CFM56-3, CFM56-3B and CFM56-3C. Effective Jun 23, 1997
- [AD 97-06-01](https://openairdocs.org/ad/97-06-01): High Pressure Compressor Rotor (HPCR) Stage 1-2 Spool · CFM International CFM56-5, CFM56-5B1, CFM56-5B1/2P and 28 more. Effective Jun 3, 1997
- [AD 97-05-13](https://openairdocs.org/ad/97-05-13): Air Turbine Engine Starter · CFM International CFM56-5, CFM56-5-A1/F, CFM56-5A4 and 3 more. Effective Jun 3, 1997
- [AD 96-25-11](https://openairdocs.org/ad/96-25-11): Redesigned Fan Blades · CFM International CFM56-3B and CFM56-3C. Effective Jan 29, 1997

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

- [AD 2021-10-09](https://openairdocs.org/ad/2021-10-09) (historical): Turbine Engine Compressor Section · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/3 and 82 more. Effective Jun 24, 2021
- [AD 2019-12-05](https://openairdocs.org/ad/2019-12-05) (historical): Turbine Section · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/P and 39 more. Effective Jul 5, 2019
- [AD 2018-18-01](https://openairdocs.org/ad/2018-18-01) (historical): Turbine Engine Compressor Section · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective Oct 16, 2018
- [AD 2018-10-11](https://openairdocs.org/ad/2018-10-11) (historical): Turbine Engine Compressor Section · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective Jun 1, 2018
- [AD 2018-09-10](https://openairdocs.org/ad/2018-09-10) (historical): Turbine Engine Compressor Section · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective May 14, 2018
- [AD 2013-26-01](https://openairdocs.org/ad/2013-26-01) (historical): Oil dynamic seal assembly · CFM International CFM56-3, CFM56-3B, CFM56-3C and 52 more. Effective Feb 3, 2014
- [AD 2013-02-02](https://openairdocs.org/ad/2013-02-02) (historical): High-pressure turbine (HPT) disks · CFM International CFM56-3, CFM56-3B and CFM56-3C with STC SE00034EN. Effective Jan 28, 2013
- [AD 2009-01-01](https://openairdocs.org/ad/2009-01-01) (historical): Exhaust gas temperature (EGT) · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/P and 22 more. Effective Dec 31, 2008
- [AD 97-09-02 R2](https://openairdocs.org/ad/97-09-02-R2) (historical): Low pressure turbine rotor (LPTR) · CFM International CFM56-5C2, CFM56-5C2/4, CFM56-5C2/F and 9 more. Effective Apr 29, 2003
- [AD 2003-02-04](https://openairdocs.org/ad/2003-02-04) (historical): Exhaust gas temperature (EGT) · CFM International CFM56-5 Series (all). Effective Feb 27, 2003
- [AD 97-09-02 R1](https://openairdocs.org/ad/97-09-02-R1) (historical): High Pressure Turbine rotor (HPTR) front shaft · CFM International CFM56-5C2/G, CFM56-5C2/G4, CFM56-5C3/G and 3 more. Effective Sep 24, 2002
- [AD 2001-17-14](https://openairdocs.org/ad/2001-17-14) (historical): LPT Conical Supports · CFM International CFM56-5C4/1. Effective Sep 7, 2001
- [AD 2001-08-51](https://openairdocs.org/ad/2001-08-51) (historical): Fuel leakage · CFM International CFM56-5 Series (all)
- [AD 2000-12-01](https://openairdocs.org/ad/2000-12-01) (historical): Critical Life-Limited Parts · CFM International CFM56-2, CFM56-2A, CFM56-2B and 54 more. Effective Dec 11, 2000
- [AD 99-08-16](https://openairdocs.org/ad/99-08-16) (historical): CFM International CFM56-2, CFM56-2A, CFM56-2B and 3 more. Effective May 13, 1999
- [AD 97-09-02](https://openairdocs.org/ad/97-09-02) (historical): High/Low Pressure Turbine Rotor · CFM International CFM56-5C2/G, CFM56-5C2/G4, CFM56-5C3/G and 3 more. Effective Jun 30, 1997

All 71: https://openairdocs.org/aircraft/N438US/ads.md

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

- [SAIB NE-08-17R3](https://openairdocs.org/saib/NE-08-17R3): Turbine Section - Propulsion Technology LLC Unapproved Repair. Issued May 28, 2014
- [SAIB NE-13-33R2](https://openairdocs.org/saib/NE-13-33R2): Turbine Engine Air Inlet Section - LP Turbine, Stage 1 Nozzle Vanes. Issued Jan 28, 2014
- [SAIB NE-12-29](https://openairdocs.org/saib/NE-12-29): Engine Fuel Distribution  CFM56-5B LPTACC Fuel Manifold. Issued Apr 27, 2012
- [SAIB NE-06-02](https://openairdocs.org/saib/NE-06-02): . Issued Oct 18, 2005
- [SAIB NE-13-33R1](https://openairdocs.org/saib/NE-13-33R1) (historical): Turbine Engine Air Inlet Section - LP Turbine, Stage 1 Nozzle Vanes. Issued Jun 24, 2013
- [SAIB NE-13-33](https://openairdocs.org/saib/NE-13-33) (historical): Turbine Engine Air Inlet Section - LP Turbine, Stage 1 Nozzle Vanes. Issued May 13, 2013
- [SAIB NE-08-17R2](https://openairdocs.org/saib/NE-08-17R2) (historical): Turbine Section - Propulsion Technology LLC Unapproved Repair. Issued Mar 7, 2011
- [SAIB NE-08-17R1](https://openairdocs.org/saib/NE-08-17R1) (historical): Propulsion Technology LLC Unapproved Repair. Issued May 22, 2008
- [SAIB NE-08-17](https://openairdocs.org/saib/NE-08-17) (historical): Propulsion Technologies International Unapproved Repair. Issued May 14, 2008

## NTSB investigations

None matched to N438US.

## FAA accident and incident reports

None matched to N438US.

## Service difficulty reports (235, 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 I5EA2024040400001](https://openairdocs.org/sdr/I5EA2024040400001), Mar 13, 2024: CHARGER. NO TEST. L-1 DOOR EMERGENCY SLIDE EXTERIOR LIGHT INOP. REPLACED EMERGENCY LIGHT BATTERY CHARGER IAW B737-400 AMM 31-51-51.
- [SDR I5EA2023111900008](https://openairdocs.org/sdr/I5EA2023111900008), Nov 19, 2023: UNKNOWN. UNKNOWN. EMERGENCY LIGHT AT STA 465 INOP - REMOVED AND REPLACED BATTERY PACK AT MODULE M1132 STA 330R IAW B737-400 AMM 33-51-51
- [SDR I5EA2021050300002](https://openairdocs.org/sdr/I5EA2021050300002), May 2, 2021: BATTERY PACK. DISCHARGED. LEFT OVER WING EMERGENCY EXIT IDENTIFIER INOP. REPLACED BATTERY PACK ON POWER SUPPLY M1134, OPS CHECK GOOD, REF B737-400 AMM 33-51-51
- [SDR I5EA2021032900012](https://openairdocs.org/sdr/I5EA2021032900012), Mar 28, 2021: WARNING MESSAGE. ILLUMINATED. CABIN ALTITUDE WARNING LIGHT AND HORN SOUNDED AT 37,000 FEET. CABIN OBSERVED ABOVE 10,000 FEET AND CLIMBING. EMERGENCY DESCENT EXECUTED AND QRH MEMORY ITEMS AND
- [SDR I5EA2021010500002](https://openairdocs.org/sdr/I5EA2021010500002), Dec 31, 2020: BATTERY PACK. NO TEST. CABIN L-2 DOOR EMERGENCY LIGHT INOPERABLE. REMOVED AND REPLACED L-2 DOOR EMERGENCY BATTERY PACK. PERFORMED OPERATIONS CHECK, NORMAL AS PER B737 AMM 33-51-51.
- [SDR I5EA2021010500001](https://openairdocs.org/sdr/I5EA2021010500001), Dec 31, 2020: BATTERY PACK. NO TEST. CABIN L-1 DOOR EMERGENCY LIGHT INOPERABLE. REMOVED AND REPLACED L-1 DOOR EMERGENCY BATTERY PACK. PERFORMED OPERATIONS CHECK, NORMAL AS PER B737 AMM 33-51-51.
- [SDR I5EA20191011907](https://openairdocs.org/sdr/I5EA20191011907), Sep 29, 2019: SMOKE DETECTOR. FAILED. LH LAVATORY SMOKE DETECTOR ALARM IS ON ( SMELL BURNED)
- [SDR I5EA2019050200002](https://openairdocs.org/sdr/I5EA2019050200002), May 2, 2019: BULKHEAD. CANNING. DISCREPANCY: AFT PRESSURE BULKHEAD AT FS 1016 HAS OIL CANNING BEYOND LIMITS OF SRM 53-80-08 A. 5 AND 7 PAGE 109 AT LBL 19, 4 INCHES BELOW STRINGER 4L. CORRECTIV
- [SDR I5EA2019050200001](https://openairdocs.org/sdr/I5EA2019050200001), May 2, 2019: BULKHEAD. CANNING. DISCREPANCY: AFT PRESSURE BULKHEAD AT FS 1016 HAS OIL CANNING BEYOND LIMITS OF SRM 53-80-08 A5 AND 7 PAGE 109 AT LBL 51, 4 INCHES INBOARD AT STRINGER 10L. CORRE
- [SDR I5EA2019050200000](https://openairdocs.org/sdr/I5EA2019050200000), May 2, 2019: BULKHEAD. CANNING. DISCREPANCY: AFT PRESSURE BULKHEAD AT FS 1016 HAS OIL CANNING BEYOND LIMITS OF SRM 53-80-08 A. 5 AND 7 PAGE 109 AT LBL 41, 12 INCHES INBOARD OF STRINGER 9R. COR
- [SDR I5EA2019005020000](https://openairdocs.org/sdr/I5EA2019005020000), May 2, 2019: BULKHEAD. CANNING. DISCREPANCY: AFT PRESSURE BULKHEAD AT FS 1016 HAS OIL CANNING BEYOND LIMITS OF SRM 737-400 53-80-08 A. 5 AND 7 PAGE 109 AT LBL 35, 12 INCHES INBOARD OF STRINGER
- [SDR I5EA201711010002](https://openairdocs.org/sdr/I5EA201711010002), Nov 1, 2017: BATTERY PACK. DISCHARGED. FWD LT EMERGENCY BATTERY LOW ON CHARGE. REMOVED AND REPLACED BATTERY PACK IAW AMM 33-51-51. OPERATION CHECK NORMAL
- [SDR I5EA20171101001](https://openairdocs.org/sdr/I5EA20171101001), Nov 1, 2017: BATTERY PACK. DISCHARGED. FED RT EMERGENCY BATTERY LOW ON CHARGE. REMOVED AND REPLACED BATTERY PACK IAW AMM 33-51-51. OPERATION CHECK NORMAL.
- [SDR USAA2013071500002](https://openairdocs.org/sdr/USAA2013071500002), Jul 12, 2013: COVER. BROKEN. IN-SEAT EMERGENCY EXIT LIGHTING COVER BROKEN AT EXIT ROW 11C. MX R & R EXIT LIGHT ASSY. CHECKS GOOD AT ROW 11C.
- [SDR USAA2013061800002](https://openairdocs.org/sdr/USAA2013061800002), Jun 17, 2013: LIGHT. INOPERATIVE. CREW REPORTED THE AFT RT OVERWING EMERGENCY LIGHT AND AFT SERVICE DOOR EMERGENCY LIGHT ARE INOP. PLACED ON MEL 33-14A. SUBSEQUENTLY, MX REPORTED ALL EMERGENCY L
- [SDR USAA2013053000004](https://openairdocs.org/sdr/USAA2013053000004), May 29, 2013: GUST LOCK. BROKEN. GUST LOCK ON LT REAR DOOR BROKEN. ADJUSTED DOOR RELEASE IAW MM 52-13-41-01.
- [SDR USAA2013051700020](https://openairdocs.org/sdr/USAA2013051700020), May 17, 2013: GIRT BAR. OUT OF ADJUST. CREW REPORTED THE 1R DOOR SLIDE HARD TO DISARM. MAINTENANCE ADJUSTED 1R DOOR SLIDE GIRT BAR PER MPPM 54-01-10. OK FOR CONTINUED SERVICE.
- [SDR USAA2013050700006](https://openairdocs.org/sdr/USAA2013050700006), May 6, 2013: LENS. MISSING. CREW REPORTED THE EXIT SEAT LIGHT LENS COVER IS MISSING AT SEAT 12C. MAINTENANCE REPLACED LENS.
- [SDR USAA2013042900017](https://openairdocs.org/sdr/USAA2013042900017), Apr 28, 2013: LENS. UNSECURE. CREW REPORTED THE EMERGENCY EXIT PLACARD AT ROW 11 NEEDS TO BE RE-INSTALLED. MAINTENANCE REPLACED ROW 11 EMERGENCY LIGHT LENS. OPS CHECK OK.
- [SDR USAA2013042300005](https://openairdocs.org/sdr/USAA2013042300005), Apr 23, 2013: SIGN. BROKEN. CREW REPORTED THE EMERGENCY FLOOR LIGHT INDICATOR "EXIT" LIGHT SIGN BROKEN. MAINTENANCE REPAIRED/ADJUSTED EMERGENCY FLOOR LIGHT PER MPPM 54-01-10. OK FOR CONTIN
- [SDR USAA2013041500014](https://openairdocs.org/sdr/USAA2013041500014), Apr 12, 2013: COVER. MISSING. CREW REPORTED THE EMERGENCY EXIT LIGHT COVER MISSING AT DOOR R2. MAINTENANCE REPLACED R2 DOOR EXIT COVER (LIGHT).
- [SDR USAA2013041000002](https://openairdocs.org/sdr/USAA2013041000002), Apr 9, 2013: PLACARD. UNSECURE. CREW REPORTED THE EXIT PLACARD AT ROW 12 FELL OFF. MAINTENANCE RE-INSTALLED EXIT PLACARD AT ROW 12.
- [SDR USAA2013032500009](https://openairdocs.org/sdr/USAA2013032500009), Mar 23, 2013: SWITCH. STUCK. DURING CRUISE, CREW COULD NOT TRANSMIT OR RECEIVE ON RADIO NR 1 & NR 2. FIRST OFFICER THINKS HIS YOKE SWITCH IS STUCK. FLIGHT DIVERTED TO MCO BECAUSE OF THE DIF
- [SDR USAA2013031500032](https://openairdocs.org/sdr/USAA2013031500032), Mar 14, 2013: SEAT TRACK. DIRTY. CREW REPORTS THE CAPTAINS SEAT FORWARD AND AFT SLIDE BINDING. MAINTENANCE CLEANED TRACKS. OPS CHECK GOOD. OK FOR SERVICE.
- [SDR USAA2013030700016](https://openairdocs.org/sdr/USAA2013030700016), Mar 5, 2013: LENS. MISSING. MAINTENANCE REPORTED THE EMERGENCY EXIT ROW 5L LENS MISSING. MAINTENANCE INSTALLED EMERGENCY EXIT LIGHT LENS 5L PER AMM 33-51-12-910-801 C1.
- [SDR USAA2013021400016](https://openairdocs.org/sdr/USAA2013021400016), Feb 12, 2013: LENS. MISSING. MAINTENANCE REPORTED THE EMERGENCY LIGHT LENS AT OVERHEAD BAG BIN 3 D&F IS MISSING. LIGHT IS OPERATIVE. MAINTENANCE INSTALLED NEW EMERGENCY LIGHT LENS. EMERGENC
- [SDR USAA2013012800005](https://openairdocs.org/sdr/USAA2013012800005), Jan 26, 2013: SMOKE DETECTOR. DIRTY. CREW REPORTED, THE AFT LEFT LAVATORY SMOKE DETECTOR INOPERATIVE. MAINTENANCE CLEANED AFT LEFT LAVATORY SMOKE DETECTOR. TESTED DETECTOR PER AMM 26-14-00-501. TES
- [SDR USAA2013012300004](https://openairdocs.org/sdr/USAA2013012300004), Jan 22, 2013: GIRT BAR. DIRTY. CREW REPORTED THE GIRT BAR, A/C RIGHT FORWARD, WAS HARD TO PUT IN AND OUT. MAINTENANCE CLEANED GIRT BAR AND RETAINER CLIPS. OPS CHECKED GOOD.
- [SDR USAA2013010800007](https://openairdocs.org/sdr/USAA2013010800007), Jan 7, 2013: LIGHT. INOPERATIVE. MAINTENANCE REPORTED THE EXIT SIGN ON END BAY OF SEAT ROW 11LT HAS ONE RED AND ONE WHITE LAMP INOPERATIVE. MAINTENANCE REPLACED DEFECTIVE LAMPS. OPERATIONAL CHE
- [SDR USAA2012112300003](https://openairdocs.org/sdr/USAA2012112300003), Nov 21, 2012: POWER SUPPLY. SHORTED. RON - ROW 1DF COVE EMERGENCY LIGHT INOPERATIVE. FOUND DIRECT SHORT TO GROUND ON M1132 POWER SUPPLY CP D2956 PIN 13. FOUND UNUSED DISCONNECT D3162 CONNECTED TO U
- [SDR USAA2012111200004](https://openairdocs.org/sdr/USAA2012111200004), Nov 10, 2012: LENS. MISSING. CREW REPORTED THE EXIT SIGN ON ROW 12, SEAT D, IS MISSING. MAINTENANCE REPLACED ROW 12, SEAT D, EXIT SIGN LENS.
- [SDR USAA2012102600001](https://openairdocs.org/sdr/USAA2012102600001), Oct 26, 2012: BRACKET. LOOSE. CREW REPORTED THE R1 DOOR SLIDE BRACKET IS LOOSE. MAINTENANCE ADJUSTED R1 DOOR SLIDE BRACKET. OPS CHECK GOOD AT THIS TIME PER AMM 05-30.
- [SDR USAA2012102200006](https://openairdocs.org/sdr/USAA2012102200006), Oct 21, 2012: LENS. MISSING. WEEKLY CHECK - ROW 11ABC AISLE EXIT SIGN MISSING LENS. INSTALLED 11ABC AISLE EXIT SIGN LENS AS REQUIRED.
- [SDR USAA2012100800018](https://openairdocs.org/sdr/USAA2012100800018), Oct 4, 2012: CAP. DELAMINATED. Q6 CHECK - DELAMINATION ON RIGHT WING TRAILING EDGE FLAP UPPER END CAP APPROX 2 INCHES FROM TRAILING EDGE. REPLACED RIGHT WING TRAILING EDGE FLAP UPPER END CAP 
- [SDR USAA2012100400009](https://openairdocs.org/sdr/USAA2012100400009), Oct 2, 2012: SLAT. WARPED. Q6 CHECK - WARPED RIGHT WING NR 4 LEADING EDGE SLAT. REPLACED RIGHT WING NR 4 LEADING EDGE SLAT IAW EA 104256 AND JOB CARD 03C40227004.
- [SDR USAA2012100400001](https://openairdocs.org/sdr/USAA2012100400001), Oct 2, 2012: STRINGER. CORRODED. Q6 CHECK - CORROSION ON STRINGER AT BS 1119, WL 246. REPAIRED STRINGER AT BS 1119, WL 246 IAW EA 104218.
- [SDR USAA2012100400010](https://openairdocs.org/sdr/USAA2012100400010), Sep 30, 2012: DOOR FRAME. CRACKED. Q6 CHECK - CRACK ON R1 INTERIOR DOOR FRAME AT BS 360, S17R. REPLACED R1 DOOR IAW JOB CARD 03C10652008.
- [SDR USAA2012100400008](https://openairdocs.org/sdr/USAA2012100400008), Sep 30, 2012: TIE CLIP. CRACKED. Q6 CHECK - CRACK ON STRINGER TIE CLIP AT BS 767, S16L. REPLACED STRINGER TIE CLIP AT BS 767, S16L IAW B737-400 SRM 51-40-02.
- [SDR USAA2012092600038](https://openairdocs.org/sdr/USAA2012092600038), Sep 20, 2012: FASTENER. LOOSE. Q6 CHECK - LOOSE FASTENERS ON RIGHT OUTBOARD FORE FLAP AT WS 280, RBL 141. REPLACED RIGHT OUTBOARD FORE FLAP AT WS 280, RBL 141 IAW JOB CARD 03C40927013.
- [SDR USAA2012092600036](https://openairdocs.org/sdr/USAA2012092600036), Sep 19, 2012: FRAME. CRACKED. Q6 CHECK - CRACK ON FRAME AT BS 440, BETWEEN S8L TO S9L. REPLACED FRAME AT BS 440, BETWEEN S8L TO S9L IAW EA 104217.
- [SDR USAA2012092600033](https://openairdocs.org/sdr/USAA2012092600033), Sep 19, 2012: FLOORBEAM. CORRODED. Q2 CHECK - EXFOLIATION CORROSION ON CARGO FLOORBEAM AT BS 777, LBL 12.5. REPLACED CARGO FLOORBEAM AT BS 777, LBL 12.5 IAW TYPICAL REPAIR 737-5311-11-0495.
- [SDR USAA2012092600030](https://openairdocs.org/sdr/USAA2012092600030), Sep 17, 2012: TIE CLIP. CRACKED. Q2 CHECK - CRACK ON STRINGER TIE CLIP AT BS 616, S5L. REPLACED STRINGER TIE CLIP AT BS 616, S5L IAW B737-400 SRM 51-10-02.
- [SDR USAA2012092600037](https://openairdocs.org/sdr/USAA2012092600037), Sep 15, 2012: TIE CLIP. CRACKED. Q6 CHECK - CRACK ON STRINGER TIE CLIP AT BS 500F, S26R. REPLACED STRINGER TIE CLIP AT BS 500F, S26R IAW B737-400 SRM 51-40-01.
- [SDR USAA2012092600029](https://openairdocs.org/sdr/USAA2012092600029), Sep 15, 2012: TIE CLIP. CRACKED. Q2 CHECK - CRACK ON STRINGER TIE CLIP AT BS500F, S26L. REPLACED STRINGER TIE CLIP AT BS 500F, S26L IAW B737-400 SRM 51-40-01.
- [SDR USAA2012092600028](https://openairdocs.org/sdr/USAA2012092600028), Sep 15, 2012: BRACKET. CRACKED. Q2 CHECK - CRACK ON TIE BRACKET AT BS 320, S21L. REPLACED TIE BRACKET AT BS 320, S21L IAW B737-400 SRM 51-10-02 AND BOEING DRAWING 65-54892.
- [SDR USAA2012092600027](https://openairdocs.org/sdr/USAA2012092600027), Sep 15, 2012: TIE CLIP. CRACKED. Q2 CHECK - CRACK ON STRINGER TIE CLIP AT BS 500E, S26R. REPLACED STRINGER TIE CLIP AT BS 500E, S26R IAW B737-400 SRM 51-40-01.
- [SDR USAA2012091700033](https://openairdocs.org/sdr/USAA2012091700033), Sep 15, 2012: FRAME. CRACKED. Q6 CHECK - FUSELAGE FRAME CRACKED AT BS 400 AND S8R. REPAIRED FRAME IAW TR 737-5310-10-0287.
- [SDR USAA2012091700032](https://openairdocs.org/sdr/USAA2012091700032), Sep 14, 2012: BRACKET. CRACKED. Q6 CHECK - BRACKET CRACKED AT BS 328 AND S21L. REMOVED AND REPLACED BRACKET IAW B737 SRM 51-40-02.
- [SDR USAA2012091700031](https://openairdocs.org/sdr/USAA2012091700031), Sep 12, 2012: DOOR FRAME. CRACKED. Q6 CHECK - R1 DOOR AFT FRAME CRACKED AT LOWEST STOP FITTING POSITION. REMOVED AND REPLACED DOOR IAW JOB CARD 03C10652008.
- [SDR USAA2012092600031](https://openairdocs.org/sdr/USAA2012092600031), Sep 9, 2012: BEAM. CRACKED. Q2 CHECK - CRACK ON L1 ENTRY DOOR FORWARD CORNER BEAM ASSEMBLY AT BS 312, S17L. REPLACED L1 ENTRY DOOR FORWARD CORNER BEAM ASSEMBLY AT BS 312, S17L IAW B737-400

All 235: https://openairdocs.org/aircraft/N438US/reports.md

## STCs that may be installed (OpenAirDocs) (7)

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 engine (CFM International CFM56 series)

- [STC SE04840NY](https://openairdocs.org/stc/SE04840NY): Installation of HarcoSemco Exhaust Gas Temperature (EGT) Electrical Harnesses in CFM56-7 engine. Kilroy Aviation LLC. Lists CFM56-7B20
- [STC SE03036CH](https://openairdocs.org/stc/SE03036CH): Application of a deep compressive stress layer using a Low Plasticity Burnishing (LPB) process on CFM56-7 Series Engines Stage 1 High Pressure Compressor (HPC) Blade Dovetails in accordance with Delta Air Lines Inc. Drawing No. 72-0396, Revision B, dated November 3, 2011, or later FAA Approved revision. Delta Air Lines Inc. Lists CFM56-7B20
- [STC SE00032EN](https://openairdocs.org/stc/SE00032EN): Installation of Pratt & Whitney (P&W) Global Material Solutions (GMS) CFM56-3 Fan/Booster Module. Pratt & Whitney. Lists CFM56-3
- [STC SE00033EN](https://openairdocs.org/stc/SE00033EN): Installation of Pratt & Whitney (P&W) Global Material Solutions (GMS) CFM56-3 High Pressure Compressor Module. Pratt & Whitney. Lists CFM56-3
- [STC SE00034EN](https://openairdocs.org/stc/SE00034EN): Installation of Pratt & Whitney (P&W) Global Material Solutions (GMS) CFM56-3 High Pressure Turbine Module. Pratt & Whitney. Lists CFM56-3
- [STC SE00035EN](https://openairdocs.org/stc/SE00035EN): Installation of Pratt & Whitney (P&W) Global Material Solutions (GMS) CFM56-3 Low Pressure Turbine Module. Pratt & Whitney. Lists CFM56-3
- [STC SE00822CH](https://openairdocs.org/stc/SE00822CH): Install AeroControlex P/N 2604880-001 variable stator feedback control cable and P/N 2604880-002 variable bleed valve feedback control cable on CFM International engines. AeroControlex Group TransDigm Inc. Lists CFM56-2

## Related

- Other Boeing 737-4B7 aircraft: https://openairdocs.org/model/boeing-737-4b7/aircraft.md
- The CFM International CFM56 series engine: https://openairdocs.org/engine/cfm-international-cfm56-series.md

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