# N127NK: Douglas DC-9-21

- Status: Valid registration
- Airframe: [Douglas DC-9-21](https://openairdocs.org/model/douglas-dc-9-21) (registry code 302205A, 85 seats)
- Engine: [Pratt & Whitney JT8D series](https://openairdocs.org/engine/pratt-whitney-jt8d-series) (registry code 52053)
- Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE) (The Boeing Company) (OpenAirDocs)
- Serial number: 47361
- Type: Fixed wing multi engine
- Engine type: Turbo-jet
- Airworthiness: Standard, transport
- Airworthiness date: May 12, 1995
- Certificate issued: September 18, 2018
- Expires: September 30, 2028
- Mode S code: A06EE9
- Registered owner: [Perris Valley Airport Inc](https://openairdocs.org/faa-owner/PERRIS%20VALLEY%20AIRPORT%20INC)
- Location: [Perris, CA](https://openairdocs.org/faa-place/CA/Perris)
- Owner type: Corporation
- Owner's area on the map: 33.7788° N, 117.3258° W: Placed by OpenAirDocs at the center of ZIP code 92570, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=127NK
- Page: https://openairdocs.org/aircraft/N127NK

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 Pratt & Whitney JT8D model are included.

## ADs that may apply (OpenAirDocs): 265 in force

### Matched by airframe (Douglas DC-9-21)

- [AD 2026-13-15](https://openairdocs.org/ad/2026-13-15): Navigation · Boeing 707-100 Long Body, 707-200, 707-100B Long Body and 74 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 2025-09-11](https://openairdocs.org/ad/2025-09-11): Flight controls · Boeing DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83) and 20 more. Effective Jun 12, 2025
- [AD 2024-20-02](https://openairdocs.org/ad/2024-20-02): Fuselage · Boeing 717-200, DC-9-11, DC-9-12 and 16 more. Effective Oct 21, 2024
- [AD 2023-12-15](https://openairdocs.org/ad/2023-12-15): Navigation · Boeing 707-100 Long Body, 707-200, 707-100B Long Body and 74 more. 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 2018-03-04](https://openairdocs.org/ad/2018-03-04): Airspeed/Mach Indicator · Boeing 717-200, DC-9-11, DC-9-12 and 23 more. Effective Mar 16, 2018
- [AD 2016-03-06](https://openairdocs.org/ad/2016-03-06): Fuel · Boeing DC-9-11, DC-9-12, DC-9-13 and 21 more. Effective Mar 23, 2016
- [AD 2014-22-05](https://openairdocs.org/ad/2014-22-05): Fuselage · Boeing DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective Dec 11, 2014
- [AD 2014-22-04](https://openairdocs.org/ad/2014-22-04): Fuselage · Boeing DC-9-11, DC-9-12, DC-9-13 and 13 more. Effective Dec 11, 2014
- [AD 2014-05-27](https://openairdocs.org/ad/2014-05-27): Navigation · Airbus A319-111, A319-112, A319-113 and 99 more. Effective May 2, 2014
- [AD 2011-21-08](https://openairdocs.org/ad/2011-21-08): Equipment/Furnishings · ATR - GIE Avions de Transport Régional ATR42-200, ATR42-300, ATR42-320 and 202 more. Effective Nov 23, 2011
- [AD 2011-12-01](https://openairdocs.org/ad/2011-12-01): Equipment/Furnishings · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 268 more. Effective Aug 1, 2011
- [AD 2011-07-04](https://openairdocs.org/ad/2011-07-04): Fuel · Boeing DC-9-14, DC-9-15, DC-9-15F and 12 more. Effective May 6, 2011
- [AD 2010-23-10](https://openairdocs.org/ad/2010-23-10): Wings · Boeing DC-9-14, DC-9-15, DC-9-15F and 12 more. Effective Dec 14, 2010
- [AD 2009-21-10 R1](https://openairdocs.org/ad/2009-21-10-R1): Oxygen · Airbus A300 B4-605R, A300 B4-620, A300 B4-622 and 138 more. Effective Feb 4, 2010
- [AD 2009-24-21](https://openairdocs.org/ad/2009-24-21): Landing gear · Boeing DC-9-14, DC-9-15, DC-9-15F and 12 more. Effective Jan 8, 2010
- [AD 2009-03-03](https://openairdocs.org/ad/2009-03-03): Fuel boost pump of the center tank · Boeing DC-9-14, DC-9-15, DC-9-15F and 12 more. Effective Mar 31, 2009
- [AD 2008-18-06](https://openairdocs.org/ad/2008-18-06): Tail cone slide · Protective rigid cover over the tail cone emergency evacuation… (Derlan STC ST735SO). Effective Jan 7, 2009
- [AD 2008-11-15](https://openairdocs.org/ad/2008-11-15): Fuel tank systems · Boeing 717-200, DC-9-11, DC-9-12 and 21 more. Effective Jul 3, 2008
- [AD 2008-06-27](https://openairdocs.org/ad/2008-06-27): Evacuation system's shear-pin · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 91 more. Effective Apr 28, 2008
- [AD 2008-03-12](https://openairdocs.org/ad/2008-03-12): Rudder pedal bracket · Boeing DC-8-11, DC-8-12, DC-8-21 and 47 more. Effective Mar 11, 2008
- [AD 2007-17-18](https://openairdocs.org/ad/2007-17-18): Static port heater assemblies · Boeing DC-9-11, DC-9-12, DC-9-13 and 20 more. Effective Oct 2, 2007
- [AD 2006-21-06](https://openairdocs.org/ad/2006-21-06): Structural inspection revisions · Boeing DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective Nov 29, 2006
- [AD 2006-18-05](https://openairdocs.org/ad/2006-18-05): Disconnect panel · Boeing DC-9-14, DC-9-15, DC-9-15F and 12 more. Effective Oct 11, 2006
- [AD 2006-18-02](https://openairdocs.org/ad/2006-18-02): Replacing the clamp bases for the fuel vent pipe · Boeing DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective Oct 4, 2006
- [AD 2006-10-14](https://openairdocs.org/ad/2006-10-14): Stop pad support fittings · Boeing 717-200, DC-9-11, DC-9-12 and 22 more. Effective Jun 21, 2006
- [AD 2006-07-08](https://openairdocs.org/ad/2006-07-08): Main fuselage frame · Boeing DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective May 5, 2006
- [AD 2006-06-04](https://openairdocs.org/ad/2006-06-04): Main landing gear (MLG) · Boeing DC-9-11, DC-9-12, DC-9-13 and 17 more. Effective Apr 20, 2006
- [AD 2006-01-02](https://openairdocs.org/ad/2006-01-02): Upper lock link assembly of the nose landing gear (NLG) · Boeing DC-9-14, DC-9-15, DC-9-15F and 18 more. Effective Feb 22, 2006
- [AD 2005-13-18](https://openairdocs.org/ad/2005-13-18): Battery terminal screws · Boeing DC-9-11, DC-9-12, DC-9-13 and 20 more. Effective Aug 1, 2005
- [AD 2005-07-18](https://openairdocs.org/ad/2005-07-18): Cargo configuration · Class E cargo compartment and pallet system (Aeronautical Engineers STC SA1993SO). Effective May 11, 2005
- [AD 2005-07-03](https://openairdocs.org/ad/2005-07-03): Rear spar of the left and right wings · Boeing DC-9-11, DC-9-12, DC-9-13 and 17 more. Effective May 4, 2005
- [AD 2004-25-14](https://openairdocs.org/ad/2004-25-14): Main landing gear (MLG) · Boeing DC-9-14, DC-9-15, DC-9-15F and 17 more. Effective Jan 20, 2005
- [AD 2004-22-01](https://openairdocs.org/ad/2004-22-01): Cargo restraint strap assemblies · Cargo restraint straps (Airline Container Manufacturing STC ST01004NY). Effective Dec 1, 2004
- [AD 2004-18-11](https://openairdocs.org/ad/2004-18-11): Outboard idler hinge fitting of the left and right wing · Boeing DC-9-14, DC-9-15, DC-9-15F and 12 more. Effective Oct 13, 2004
- [AD 2004-07-05](https://openairdocs.org/ad/2004-07-05): Engine Pylon Aft Upper Spar Straps (Caps) · Boeing DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective May 5, 2004
- [AD 2004-07-04](https://openairdocs.org/ad/2004-07-04): Ballast transformers · Boeing DC-9-14, DC-9-15, DC-9-15F and 12 more. Effective May 5, 2004
- [AD 2004-05-25](https://openairdocs.org/ad/2004-05-25): Seat Locking Pins · Boeing DC-9-14, DC-9-15, DC-9-15F and 18 more. Effective Apr 19, 2004
- [AD 2003-03-15 R1](https://openairdocs.org/ad/2003-03-15-R1): Airplane Flight Manual (AFM) - oxygen masks · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 90 more. Effective Dec 22, 2003
- [AD 2003-17-07 R1](https://openairdocs.org/ad/2003-17-07-R1): Auxiliary power unit (APU) · Boeing DC-10-10, DC-10-10F, DC-10-15 and 57 more. Effective Sep 24, 2003
- [AD 2003-09-07](https://openairdocs.org/ad/2003-09-07): Left and right main landing gear (MLG) · Boeing DC-9-14, DC-9-15, DC-9-15F and 17 more. Effective Jun 5, 2003
- [AD 2002-26-10](https://openairdocs.org/ad/2002-26-10): Corners of the Forward Lower Cargo Doorjamb · Boeing DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective Feb 10, 2003
- [AD 2002-26-08](https://openairdocs.org/ad/2002-26-08): Emergency Power Switch Knob on the Overhead Switch Panel in the Flight Compartment · Boeing DC-9-11, DC-9-12, DC-9-13 and 20 more. Effective Feb 10, 2003
- [AD 2002-26-13](https://openairdocs.org/ad/2002-26-13): Left and right generator power relays · Boeing DC-9-11, DC-9-12, DC-9-13 and 20 more. Effective Feb 6, 2003
- [AD 2002-25-04](https://openairdocs.org/ad/2002-25-04): Circuit breakers · Boeing DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective Jan 17, 2003
- [AD 2002-21-09](https://openairdocs.org/ad/2002-21-09): Cockpit enclosure window sill · Boeing DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective Nov 29, 2002
- [AD 2002-07-06](https://openairdocs.org/ad/2002-07-06): Upper and Lower Corners and Upper Center of the Door Cutout of the Aft Pressure Bulkhead · Boeing DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective May 14, 2002
- [AD 2002-04-01](https://openairdocs.org/ad/2002-04-01): Upper Lock Link Assembly of the Nose Landing Gear (NLG) · Boeing DC-9-11, DC-9-12, DC-9-13 and 21 more. Effective Mar 28, 2002
- [AD 2001-24-27](https://openairdocs.org/ad/2001-24-27): Rudder Pedal Adjuster Hub Assembly · Boeing DC-9-11, DC-9-12, DC-9-13 and 20 more. Effective Jan 16, 2002

### Matched by engine (Pratt & Whitney JT8D series)

- [AD 2021-22-19](https://openairdocs.org/ad/2021-22-19): Turbine Engine Compressor Section · Pratt & Whitney JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Dec 28, 2021
- [AD 2015-14-05](https://openairdocs.org/ad/2015-14-05): Cracking in the low-pressure turbine (LPT) shaft · Pratt & Whitney Division JT8D-217C and JT8D-219. Effective Aug 25, 2015
- [AD 2011-04-04](https://openairdocs.org/ad/2011-04-04): Critical life-limited parts · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Mar 22, 2011
- [AD 2011-03-01](https://openairdocs.org/ad/2011-03-01): Critical life- limited parts · Pratt & Whitney Division JT8D-11, JT8D-15, JT8D-15A and 9 more. Effective Mar 4, 2011
- [AD 2010-21-17](https://openairdocs.org/ad/2010-21-17): Fan blade · Pratt & Whitney Division JT8D-11, JT8D-15, JT8D-17 and 3 more. Effective Nov 12, 2010
- [AD 97-17-04 R1](https://openairdocs.org/ad/97-17-04-R1): Front compressor front hub · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217C and 1 more. Effective Apr 22, 2010
- [AD 2009-24-01](https://openairdocs.org/ad/2009-24-01): Fan blade · Pratt & Whitney Division JT8D-11, JT8D-15, JT8D-17 and 5 more. Effective Jan 4, 2010
- [AD 2006-17-07 R1](https://openairdocs.org/ad/2006-17-07-R1): High pressure compressor (HPC) front hubs and HPC disk · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 18 more. Effective Nov 2, 2006
- [AD 2005-21-01](https://openairdocs.org/ad/2005-21-01): High pressure turbine (HPT) shaft · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Nov 21, 2005
- [AD 2005-17-16](https://openairdocs.org/ad/2005-17-16): Critical life-limited rotating parts · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 17 more. Effective Sep 30, 2005
- [AD 2004-26-04](https://openairdocs.org/ad/2004-26-04): HPT containment hardware · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Feb 9, 2005
- [AD 2003-16-05](https://openairdocs.org/ad/2003-16-05): High pressure compressor (HPC) disks · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Sep 12, 2003
- [AD 2003-12-07](https://openairdocs.org/ad/2003-12-07): 12th Stage high pressure compressor · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 12 more. Effective Jul 18, 2003
- [AD 2003-05-07](https://openairdocs.org/ad/2003-05-07): Low pressure compressor (LPC) · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 12 more. Effective Apr 17, 2003
- [AD 2002-21-17](https://openairdocs.org/ad/2002-21-17): Fan duct and fan exit guide vane · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Nov 29, 2002
- [AD 2002-16-08](https://openairdocs.org/ad/2002-16-08): Combustion Chamber Outer Case (CCOC) · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Sep 20, 2002
- [AD 2001-15-18](https://openairdocs.org/ad/2001-15-18): Stage Compressor Disks · Pratt & Whitney Division JT8D-11, JT8D-15, JT8D-15A and 6 more. Effective Sep 4, 2001
- [AD 2000-22-06](https://openairdocs.org/ad/2000-22-06): Main Fuel Pump · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 8 more. Effective Dec 4, 2000
- [AD 99-10-11](https://openairdocs.org/ad/99-10-11): Fan Blades and Shrouds · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Jun 14, 1999
- [AD 99-01-08](https://openairdocs.org/ad/99-01-08): Stage 7 through Stage 15 High-Pressure Compressor (HPC) Disks · Pratt & Whitney Division JT3D-1, JT3D-1-MC6, JT3D-1-MC7 and 30 more. Effective Jan 5, 1999
- [AD 98-21-24](https://openairdocs.org/ad/98-21-24): Compressor Disks · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 17 more. Effective Nov 16, 1998
- [AD 98-04-39](https://openairdocs.org/ad/98-04-39): Combustion Chamber Outer Case · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 12 more. Effective Feb 25, 1998
- [AD 97-19-12](https://openairdocs.org/ad/97-19-12): Hub Inspection · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 9 more. Effective Nov 18, 1997
- [AD 97-19-14](https://openairdocs.org/ad/97-19-14): Low Pressure Turbine (LPT) Blade Sets · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 9 more. Effective Oct 24, 1997
- [AD 96-23-14](https://openairdocs.org/ad/96-23-14): Combustion Chamber Outer Cases · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 12 more. Effective Jan 2, 1997
- [AD 96-15-06](https://openairdocs.org/ad/96-15-06): First Stage Fan Hubs · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Sep 3, 1996
- [AD 95-26-03](https://openairdocs.org/ad/95-26-03): High Pressure Compressor Disks · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 12 more. Effective Jan 11, 1996
- [AD 86-09-02 R2](https://openairdocs.org/ad/86-09-02-R2): Combustion Chamber Liners · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 12 more. Effective Nov 17, 1995
- [AD 95-16-07](https://openairdocs.org/ad/95-16-07): High Pressure Compressor (HPC) Disks · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 11 more. Effective Sep 11, 1995
- [AD 95-10-10](https://openairdocs.org/ad/95-10-10): Compressor Fan Hub · Pratt & Whitney Division JT8D-11, JT8D-15, JT8D-15A and 6 more. Effective Jul 21, 1995
- [AD 94-25-07](https://openairdocs.org/ad/94-25-07): Combustion Chamber Outer Case · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 12 more. Effective Mar 30, 1995
- [AD 95-02-16](https://openairdocs.org/ad/95-02-16): Fuel Nozzle and Support Assembly · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 17 more. Effective Feb 21, 1995
- [AD 94-20-09](https://openairdocs.org/ad/94-20-09): Low Pressure Turbine Blade Sets · Pratt & Whitney Division JT8D-15A, JT8D-17A and JT8D-17AR. Effective Nov 14, 1994
- [AD 91-24-14](https://openairdocs.org/ad/91-24-14): Bearing Seal Spacer · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 18 more. Effective Jan 21, 1992
- [AD 89-25-11](https://openairdocs.org/ad/89-25-11): Fan Blade Retaining Plates · Pratt & Whitney Division JT8D-11, JT8D-15, JT8D-15A and 6 more. Effective Jan 15, 1990
- [AD 89-24-02](https://openairdocs.org/ad/89-24-02): Fan Disk · Pratt & Whitney Division JT8D-7, JT8D-7A and JT8D-7B. Effective Nov 13, 1989
- [AD 88-04-02](https://openairdocs.org/ad/88-04-02): Anti-rotation Pin Failures · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Mar 4, 1988
- [AD 87-03-13](https://openairdocs.org/ad/87-03-13): Compressor Blade · Pratt & Whitney Division JT8D-209, JT8D-217 and JT8D-217A. Effective Feb 16, 1987
- [AD 86-08-04 R1](https://openairdocs.org/ad/86-08-04-R1): HPC Removable Sleeve Spacers · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 12 more. Effective Nov 4, 1986
- [AD 86-02-52 R1](https://openairdocs.org/ad/86-02-52-R1): Combustion Chamber · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 12 more. Effective Apr 14, 1986
- [AD 85-19-51 R1](https://openairdocs.org/ad/85-19-51-R1): Second Stage Turbine Disk · Pratt & Whitney Division JT8D-15, JT8D-17 and JT8D-17R. Effective Dec 26, 1985
- [AD 78-17-02 R3](https://openairdocs.org/ad/78-17-02-R3): Compressor Front Hubs · Pratt & Whitney Division JT8D-11, JT8D-15, JT8D-15A and 6 more. Effective Mar 30, 1984
- [AD 80-15-51](https://openairdocs.org/ad/80-15-51): Engine Rear Compressor Front Hubs · Pratt & Whitney Division JT8D-209, JT8D-1, JT8D-11 and 11 more. Effective Aug 21, 1980
- [AD 78-23-12](https://openairdocs.org/ad/78-23-12): Third Stage Turbine Blade Rivet · Pratt & Whitney Division JT8D-1, JT8D-1A, JT8D-1B and 5 more. Effective Dec 20, 1978
- [AD 77-16-12](https://openairdocs.org/ad/77-16-12): Low Turbine Shaft · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 8 more. Effective Aug 31, 1977
- [AD 76-24-01](https://openairdocs.org/ad/76-24-01): Eighth Stage Compressor Disk · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-1A and 6 more. Effective Jun 22, 1977
- [AD 77-07-11](https://openairdocs.org/ad/77-07-11): Fourth Stage Turbine Stator And Rotor · Pratt & Whitney Division JT8D-9 and JT8D-9A. Effective Apr 15, 1977
- [AD 77-03-06](https://openairdocs.org/ad/77-03-06): Compressor Front Hubs · Pratt & Whitney Division JT8D-1, JT8D-1A, JT8D-1B and 3 more. Effective Feb 25, 1977
- [AD 75-05-06](https://openairdocs.org/ad/75-05-06): Fuel Manifold Leakage · Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15 and 18 more. Effective Feb 24, 1977
- [AD 76-20-02](https://openairdocs.org/ad/76-20-02): Second Stage Fan Blades · Pratt & Whitney Division JT8D-1, JT8D-1A, JT8D-1B and 3 more. Effective Oct 10, 1976

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

- [AD 2022-09-18](https://openairdocs.org/ad/2022-09-18) (historical): Navigation · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 72 more. Effective May 23, 2022
- [AD 2012-18-05](https://openairdocs.org/ad/2012-18-05) (historical): Fuel · Boeing DC-9-11, DC-9-12, DC-9-13 and 21 more. Effective Oct 11, 2012
- [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 2006-07-25](https://openairdocs.org/ad/2006-07-25) (historical): Rudder pedal bracket · McDonnell Douglas DC-8-11, DC-8-12, DC-8-21 and 44 more. Effective May 16, 2006
- [AD 2005-19-08](https://openairdocs.org/ad/2005-19-08) (historical): Main landing gear (MLG) shock strut cylinder · McDonnell Douglas DC-9-14, DC-9-15, DC-9-15F and 12 more. Effective Oct 21, 2005
- [AD 2004-23-11](https://openairdocs.org/ad/2004-23-11) (historical): Center wing rear spar · Boeing DC-9-14, DC-9-15, DC-9-21 and 11 more. Effective Dec 20, 2004
- [AD 2003-17-07](https://openairdocs.org/ad/2003-17-07) (historical): Fire Extinguishers for the Engine and Auxiliary Power Unit (APU) · McDonnell Douglas DC-10-10, DC-10-10F, DC-10-15 and 60 more. Effective Sep 24, 2003
- [AD 2003-03-15](https://openairdocs.org/ad/2003-03-15) (historical): Airplane Flight Manual (AFM) - Oxygen Masks · Boeing 707 Series (all), 720 Series (all), 727 Series (all) and 75 more. Effective Mar 7, 2003
- [AD 2003-03-08](https://openairdocs.org/ad/2003-03-08) (historical): Eletrical connectors · McDonnell Douglas DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective Mar 7, 2003
- [AD 2001-26-24](https://openairdocs.org/ad/2001-26-24) (historical): Transformer Ballast Assembly · McDonnell Douglas DC-9-11, DC-9-12, DC-9-13 and 14 more. Effective Feb 8, 2002
- [AD 98-26-09](https://openairdocs.org/ad/98-26-09) (historical): Fatigue Cracking In Doorstops And Doorjamb · McDonnell Douglas DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective Jan 22, 1999
- [AD 98-08-24](https://openairdocs.org/ad/98-08-24) (historical): Fuselage Skin Or Doubler · McDonnell Douglas DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective May 22, 1998
- [AD 96-21-01](https://openairdocs.org/ad/96-21-01) (historical): Main Landing Gear Hydraulic Damper Assembly · McDonnell Douglas DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective Nov 14, 1996
- [AD 74-08-09 R2](https://openairdocs.org/ad/74-08-09-R2) (historical): Waste Receptacles · Aero Spacelines 377, 377MG, 377SGT and 268 more. Effective Jul 29, 1996
- [AD 96-13-03](https://openairdocs.org/ad/96-13-03) (historical): Structural Integrity · McDonnell Douglas DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective Jul 24, 1996
- [AD 96-02-05](https://openairdocs.org/ad/96-02-05) (historical): Rudder Pedals Adjuster Hub Assembly · McDonnell Douglas DC-9-11, DC-9-12, DC-9-13 and 20 more. Effective Mar 25, 1996
- [AD 95-12-25](https://openairdocs.org/ad/95-12-25) (historical): FIREX Pipe Assembly · McDonnell Douglas DC-9-11, DC-9-12, DC-9-13 and 20 more. Effective Jul 24, 1995
- [AD 95-04-01](https://openairdocs.org/ad/95-04-01) (historical): AFM - Limitations - Windshear · Boeing 727-100 Series, 727-200 Series, 737-100 Series and 54 more. Effective Mar 8, 1995
- [AD 94-03-01](https://openairdocs.org/ad/94-03-01) (historical): Maintenance Inspection Program · McDonnell Douglas DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective Mar 14, 1994
- [AD 93-13-07](https://openairdocs.org/ad/93-13-07) (historical): Install Water Drain System · McDonnell Douglas DC-9-11, DC-9-12, DC-9-13 and 17 more. Effective Aug 18, 1993
- [AD 92-27-07](https://openairdocs.org/ad/92-27-07) (historical): Rudder Pedals Adjuster Hub Assembly · McDonnell Douglas DC-9-11, DC-9-12, DC-9-13 and 20 more. Effective Jan 22, 1993
- [AD 87-14-07 R1](https://openairdocs.org/ad/87-14-07-R1) (historical): Maintenance Inspection Program · McDonnell Douglas DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective Dec 23, 1988
- [AD 77-14-19](https://openairdocs.org/ad/77-14-19) (historical): Engine Pylon · McDonnell Douglas DC-9-11, DC-9-12, DC-9-13 and 15 more. Effective Aug 23, 1977
- [AD 2011-07-02](https://openairdocs.org/ad/2011-07-02) (historical): Turbine Blade · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Apr 28, 2011
- [AD 2006-17-07](https://openairdocs.org/ad/2006-17-07) (historical): Fretting and fluorescent magnetic particle inspections (FMPI) for cracking in the area of the tierod holes on the HPC front hubs · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 18 more. Effective Oct 4, 2006
- [AD 2005-18-02](https://openairdocs.org/ad/2005-18-02) (historical): Engine manufacturer's time limits section (TLS) · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Feb 28, 2006
- [AD 2005-02-03](https://openairdocs.org/ad/2005-02-03) (historical): Turbine (LPT) Blades 3rd and 4th Stage · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Mar 3, 2005
- [AD 2002-23-14](https://openairdocs.org/ad/2002-23-14) (historical): High Pressure Compressor (HPC) Front Hubs · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Dec 31, 2002
- [AD 2002-13-09](https://openairdocs.org/ad/2002-13-09) (historical): Rotating engine parts · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Dec 30, 2002
- [AD 2000-21-07](https://openairdocs.org/ad/2000-21-07) (historical): Critical Life-Limited Parts · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Apr 23, 2001
- [AD 99-26-06](https://openairdocs.org/ad/99-26-06) (historical): Combustion Chamber Outer Case · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Feb 22, 2000
- [AD 99-27-01](https://openairdocs.org/ad/99-27-01) (historical): Low Pressure Turbine Blades · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Feb 2, 2000
- [AD 99-22-14](https://openairdocs.org/ad/99-22-14) (historical): High Pressure Turbine Shaft · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Dec 28, 1999
- [AD 99-12-04](https://openairdocs.org/ad/99-12-04) (historical): Critical Life Limited Part Inspection · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Jul 8, 1999
- [AD 97-19-13](https://openairdocs.org/ad/97-19-13) (historical): High Pressure Turbine (HPT) Shaft · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217A and 2 more. Effective Oct 24, 1997
- [AD 97-17-04](https://openairdocs.org/ad/97-17-04) (historical): Fan Hubs · Pratt & Whitney Division JT8D-209, JT8D-217, JT8D-217C and 1 more. Effective Sep 30, 1997

All 301: https://openairdocs.org/aircraft/N127NK/ads.md

## Information bulletins (advisory) (10 in force)

- [SAIB NM-15-03](https://openairdocs.org/saib/NM-15-03): Flight Controls. Issued Nov 24, 2014
- [SAIB NM-06-57](https://openairdocs.org/saib/NM-06-57): Reports of damage to airplanes and to property on the ground caused by blue or clear ice falling from airplanes.. Issued Jul 27, 2006
- [SAIB NE-16-22](https://openairdocs.org/saib/NE-16-22): Turbine Engine Combustion Section  JT8D Series Turbofan Engines. Issued Sep 2, 2016
- [SAIB NE-10-32](https://openairdocs.org/saib/NE-10-32): Turbine Engine Accessory Drive. Issued May 7, 2010
- [SAIB NE-05-75R1](https://openairdocs.org/saib/NE-05-75R1): . Issued Aug 4, 2005
- [SAIB NE-05-30](https://openairdocs.org/saib/NE-05-30): . Issued Feb 3, 2005
- [SAIB NE-02-22](https://openairdocs.org/saib/NE-02-22): . Issued Mar 26, 2002
- [SAIB NE-02-08R1](https://openairdocs.org/saib/NE-02-08R1): . Issued Feb 8, 2002
- [SAIB NE-01-42](https://openairdocs.org/saib/NE-01-42): . Issued Sep 25, 2001
- [SAIB ANE-97-03](https://openairdocs.org/saib/ANE-97-03): . Issued Apr 25, 1997
- [SAIB NE-05-75](https://openairdocs.org/saib/NE-05-75) (historical): . Issued Jul 22, 2005

## NTSB investigations

None matched to N127NK.

## FAA accident and incident reports

None matched to N127NK.

## Service difficulty reports (41)

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 WX0A02009A](https://openairdocs.org/sdr/WX0A02009A), Nov 2, 2002: DUCT. RUPTURED. LAS - TAIL COMPARTMENT HIGH TEMP ANNUNCIATOR INDICATION ILLUMINATED IN FLIGHT. AIRCRAFT RETURNED TO STATION WITHOUT INCIDENT. MAINTENANCE INSPECTED TAIL COMPART
- [SDR WXOA02009A](https://openairdocs.org/sdr/WXOA02009A), Nov 2, 2002: DUCT. CRACKED. TAIL COMP HIGH TEMP ANNUNCIATOR INDIC ILLUMINATED INFLIGHT. AC RETURNED TO STATION W/O INCIDENT. MAINT INSP TAIL COMP AND ASSOC PRESS DIST SYS FOR CAUSE OF HIGH
- [SDR WXOA02009](https://openairdocs.org/sdr/WXOA02009), Nov 2, 2002: DUCT. RUPTURED. LAS - TAIL COMPARTMENT HIGH TEMP ANNUNCIATOR INDICATION ILLUMINATED IN FLIGHT. AIRCRAFT RETURNED TO STATION WITHOUT INCIDENT. MAINTENANCE INSPECTED TAIL COMPART
- [SDR WXOA02007](https://openairdocs.org/sdr/WXOA02007), Sep 18, 2002: DRIVE GEAR. FAILED. ENROUTE, NR 1 ENGINE LOW OIL PRESSURE ANNUNCIATOR INDICATION ILLUMINATED. CREW COMPLIED WITH AOM EMERGENCY/ ABNORMAL PROCEDURES. PRECAUTIONARY INFLIGHT ENGINE S
- [SDR WX0A01003](https://openairdocs.org/sdr/WX0A01003), Jul 25, 2001: PAN. CRACKED. LCQ - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, FOUND AFT CARGO DOOR CRACKED AROUND RIVNUT FASTENER AT LOWER FORWARD CORNER. ROUTED OUT CRACK ON A
- [SDR WX0A01002](https://openairdocs.org/sdr/WX0A01002), Jul 25, 2001: AILERON. DELAMINATED. LCQ - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, LEFT AILERON INBOARD TAB DELAMINATION DETECTED ON LOWER OUTBOARD SIDE. DELAMINATION REPORTED TO BE
- [SDR WX0A01001](https://openairdocs.org/sdr/WX0A01001), Jul 25, 2001: ATTACH FITTING. CRACKED. LCQ - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, CRACKED DETECTED BY VISUAL INSPECTION AT VERTICAL STABILIZER LEFT DORSAL FIN ATTACH FITTING. HFEC 
- [SDR WX0A01007](https://openairdocs.org/sdr/WX0A01007), Jul 25, 2001: FUEL LINE. LEAKING. LCQ - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, MAIN FUEL SUPPLY HOSE ASSEMBLIES ON RIGHT AND LEFT ENGINES TO FUEL CONTROL UNITS REPORTED LEAKING.
- [SDR WX0A01008](https://openairdocs.org/sdr/WX0A01008), Jul 25, 2001: WIRE. CHAFED. LCQ - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, FOUND RIGHT ENGINE AC LOAD METER IN COCKPIT OVERHEAD PANEL TO HAVE CHAFED WIRES AT CONNECTOR MAINT
- [SDR WX0A01006](https://openairdocs.org/sdr/WX0A01006), Jul 25, 2001: JACKSCREW. WORN. LCQ - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, HORIZONTAL STABILIZER JACKSCREW FAILED END PLAY CHECK PER WORK CARD 0855, SB 27A362 AND AD 2000-15
- [SDR WX0A01005](https://openairdocs.org/sdr/WX0A01005), Jul 25, 2001: SKIN. CORRODED. LCQ - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, LEVEL 1 CORROSION WAS FOUND IN LOWER AFT FUSELAGE SKIN AT AFT JACK PAD AREA. CORROSION DAMAGE TO F
- [SDR WX0A01004](https://openairdocs.org/sdr/WX0A01004), Jul 25, 2001: SKIN. CRACKED. LCQ - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, FOUND FORWARD CARGO DOOR INNER SKIN CRACKED IN THE RADIUS BELOW AFT LATCH COVER. STOP DRILLED CRAC
- [SDR WXOA99031](https://openairdocs.org/sdr/WXOA99031), Nov 13, 1999: SLAT. DENTED. AMA - BIRD STRIKE REPORTED TO LEFT WING AT 8500 FT DURING DESCENT FOR LANDING. AIRCRAFT LANDED WITHOUT INCIDENT. BIRD STRIKE INSPECTION ACCOMPLISHED IAW DC-9 MM
- [SDR WXOA99030](https://openairdocs.org/sdr/WXOA99030), Oct 22, 1999: ANGLE. CORRODED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, FOUND LEVEL 1 CORROSION ON AFT STAIR ANGLE. REMOVED CORRODED ANGLE. FABRICATED REPAIR ANGLE AND IN
- [SDR WXOA99029](https://openairdocs.org/sdr/WXOA99029), Oct 22, 1999: BEAM. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, FOUND CRACK IN GALLEY SERVICE DOOR HORIZONTAL BEAM AFT EDGE. CRACK REPORTED APPROXIMATELY .240 INC
- [SDR WXOA99028](https://openairdocs.org/sdr/WXOA99028), Oct 22, 1999: FRAME. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, FOUND THREE CRACKES ON FUSELAGE FRAME STATION 718 AT STRINGER 17L. REMOVED DAMAGED MATERIAL. PERFO
- [SDR WXOA99027](https://openairdocs.org/sdr/WXOA99027), Oct 22, 1999: FRAME. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, FOUND 3.5 INCH CRACK IN RADIUS OF FUSELAGE FRAME STATION 737 AT LONGERON 17L. REMOVED DAMAGED SECT
- [SDR WXOA99026](https://openairdocs.org/sdr/WXOA99026), Oct 22, 1999: FRAME. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, FOUND CRACK IN AFT ACCESSORY COMPARTMENT RIGHT SIDE OF FRAME 859 AT LONGERON 13R NEAR LIGHTNING HO
- [SDR WXOA99025](https://openairdocs.org/sdr/WXOA99025), Oct 22, 1999: INTERCOSTAL. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, FOUND INTERCOSTAL CRACKED AT FORWARD AREA OF AFT CARGO DOOR JAMB. REMOVED DAMAGED INTERCOSTAL AND 
- [SDR WXOA99024](https://openairdocs.org/sdr/WXOA99024), Oct 20, 1999: DOUBLER. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, FOUND INTERNAL DOUBLER EDGE OF RUDDER BROKEN AT REFERENCE ZR99. REMOVED DAMAGED INTERNAL DOUBLER. 
- [SDR WXOA99023](https://openairdocs.org/sdr/WXOA99023), Oct 16, 1999: SHEAR TIE. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, NDT HFEC INSPECTION DETECTED AND APPROXIMATE 2 INCH LONG CRACK ON SHEAR TIE BETWEEN LONGERON L14 A
- [SDR WXOA99022](https://openairdocs.org/sdr/WXOA99022), Oct 16, 1999: SUPPORT. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, NDT HFEC INSPECTION OF FORWARD CARGO DORO PER OPS 4.735 DETECTED CRACKED AT AFT SIDE OF INTERCOSTA
- [SDR WXOA99021](https://openairdocs.org/sdr/WXOA99021), Oct 15, 1999: SHEAR TIE. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, NDT HFEC INSPECTION DETECTED CRACK OF APPROXIMATELY 2 INCH LONG ON SHEER CLIP BETWEEN LONGERON L15
- [SDR WXOA99020](https://openairdocs.org/sdr/WXOA99020), Oct 15, 1999: SKIN. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, CRACK DETECTED AT UPPER AFT AREA OF LEFT MLG DOOR NEAR HINGE. STOP DRILLED CRACK, INSTALLED DOUBLE
- [SDR WXOA99019](https://openairdocs.org/sdr/WXOA99019), Oct 15, 1999: ANGLE. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, NDT HFEC DETECTED A CRACK ON ANGLE P/N 9912243-10 AT THE RIGHT PYLON BULKHEAD LOWER FRONT SPAR (F/
- [SDR WXOA99018](https://openairdocs.org/sdr/WXOA99018), Oct 15, 1999: SKIN. DENTED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, DENT DISCOVERED ON RIGHT SIDE OF RUDDER BETWEEN RIBS 23 AND 24, LOCATED APPROXIMATELY 18 INCH FROM
- [SDR WXOA99017](https://openairdocs.org/sdr/WXOA99017), Oct 15, 1999: FITTING. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, NDT HFEC INSPECTIN PERFORMED PER OPS 4.751 OF LEFT PYLON 'BATH TUB' FITTING. INDICATION OF CRACK N
- [SDR WXOA99016](https://openairdocs.org/sdr/WXOA99016), Oct 15, 1999: ANGLE. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, NDT HFEC INSPECTION PERFORMED PER OPS 4.735 AT FORWARD CARGO DOOR. INDICATION OF CRACK NOTED ON IN
- [SDR WXOA99015](https://openairdocs.org/sdr/WXOA99015), Oct 14, 1999: DOOR PAN. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, CRACK DETECTED AT PAN AND INTERCOSTAL INTERSECTION OF TOP FORWARD CORNER OF FORWARD CARGO DOOR. FA
- [SDR WXOA99014](https://openairdocs.org/sdr/WXOA99014), Oct 14, 1999: ANGLE. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, NDT HFEC INSPECTION DETECTED CRACK INDICATION ON FORWARD CARGO DOOR AT FORWARD SIDE OF LOWER AFT D
- [SDR WXOA99013](https://openairdocs.org/sdr/WXOA99013), Oct 14, 1999: LONGERON. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, NDT HFEC INSPECTION DETECTED CRACK INDICATION AT LONGERON 16, FUSELAGE STATION 786 RIGHT. CRACK EV
- [SDR WXOA99012](https://openairdocs.org/sdr/WXOA99012), Oct 14, 1999: PANEL. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, VERTICAL STABILIZER ACCESS PANEL 3806 HAS CRACK PROPOGATING FROM EXISTING STOP DRILL. STOP DRILLED
- [SDR WXOA99011](https://openairdocs.org/sdr/WXOA99011), Oct 14, 1999: DUCT. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, VERTICAL STABILIZER AIR INTAKE DUCT AT 12 O'CLOCK POSITION HAS A CRACK APPROXIMATELY .25 INCHES LO
- [SDR WXOA99010](https://openairdocs.org/sdr/WXOA99010), Oct 14, 1999: FRAME. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, NDT HFEC INSPECTION AT STATION 766 RIGHT SIDE, BETWEEN LONGERON 15 AND 16, DETECTED CRACK IN RADIU
- [SDR WXOA99009](https://openairdocs.org/sdr/WXOA99009), Oct 14, 1999: SUPPORT. CORRODED. MHV - DURING AIRCRAFT SCHEDULED INSPECTON AT REPAIR STATION, LEVEL 1 SURFACE CORROSION DETECTED AT THREE PLACES IN AFT RIGHT LAV FLOOR SUPPORT FRAME, STATIONS 7
- [SDR WXOA99008](https://openairdocs.org/sdr/WXOA99008), Oct 12, 1999: CLIPS. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, CRACKS DETECTED IN TWO CLIPS ON RIGHT ENGINE LOWER APRON. REMOVED CRACKED CLIPS, FABRICATED REPAIR
- [SDR WXOA99007](https://openairdocs.org/sdr/WXOA99007), Oct 11, 1999: ANGLE. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, PERFORMED NDT HFEC INSPECTION PER OPS 4.735. RESULTS OF INSPECTION DETECTED CRACK ON ANGLE P/N 991
- [SDR WXOA99006](https://openairdocs.org/sdr/WXOA99006), Oct 6, 1999: FRAME. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, AFT ACCESSORY COMPARTMENT FRAME 859 AT LONGERON L13 IS CRACKED BY LIGHTNING HOLE. STOP DRILLED CRA
- [SDR WXOA99005](https://openairdocs.org/sdr/WXOA99005), Oct 6, 1999: DUCT. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, CRACK DETECTED IN COOLING EXHAUST DUCT AT FUSELAGE STATION 261 AND LONGERON L21. WELDED CRACKS TWO
- [SDR WXOA99004](https://openairdocs.org/sdr/WXOA99004), Oct 6, 1999: BRACKET. CRACKED. MHV - DURING AIRCRAFT SCHEDULED INSPECTION AT REPAIR STATION, LEFT WING SLAT TRACK NR 2 FORWARD LOWER PANEL BRACKET CRACKED AND OUTBOARD BRACKET HOLE ELONGATED.
- [SDR WXOA98001](https://openairdocs.org/sdr/WXOA98001), Oct 14, 1998: CONNECTOR. FAILED. FAT - DURING ACCOMPLISHMENT OF SCHEDULED AIRCRAFT MAINTENANCE, FOUND DAMAGED ELECTRICAL WIRING CONNECTOR AT PRODUCTION SPLICE FOR ROWS 9-10 (RT) CABIN INTERIOR 

## STCs that may be installed (OpenAirDocs) (235, 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 (Douglas DC-9-21)

- [STC SA2622NM](https://openairdocs.org/stc/SA2622NM): Installation of Precise Flight Pulselite Control Unit in landing/taxi system. (767-200 B17) (DHC-8 101). Precise Flight Inc
- [STC ST00030IB](https://openairdocs.org/stc/ST00030IB): Installation of Test Tech ELT. APTOZ EHF
- [STC ST09181AC](https://openairdocs.org/stc/ST09181AC): Installation of main landing gear spotlights. The Boeing Company
- [STC ST03885AT](https://openairdocs.org/stc/ST03885AT): Installation of an Avionica, Inc. avCM Cellular Module. Aircraft Systems and Manufacturing Inc
- [STC SA2040NM](https://openairdocs.org/stc/SA2040NM): Installation of closet and windscreen. Safran Cabin Inc
- [STC SA3469NM](https://openairdocs.org/stc/SA3469NM): Installation of Closet/Stowage Compartments/Coat Compartment/ Coatroom. Safran Cabin Inc
- [STC SA3494NM](https://openairdocs.org/stc/SA3494NM): Installation of auxiliary galley. Safran Cabin Inc. Lists DC-9 Series
- [STC SA3165NM](https://openairdocs.org/stc/SA3165NM): Installation of Floor Proximity Emergency Escape Path Marking System. Bruce Aerospace Inc
- [STC ST00092LA](https://openairdocs.org/stc/ST00092LA): Instalation of interior fluorescent cabin lighting system. Bruce Aerospace Inc
- [STC ST00069AT](https://openairdocs.org/stc/ST00069AT): Installation of a Fairchild Digital or Sundstrand Universal expanded parameters digital flight data recorder. Acron Aviation Inc
- [STC ST01518NY](https://openairdocs.org/stc/ST01518NY): Installation of Flight Systems Cabin Surveillance System (CSS). Acron Aviation Inc
- [STC ST02472AT](https://openairdocs.org/stc/ST02472AT): Installation of a mini Quick Access Recorder (QAR) model MKI, MKII, or MKIII. Aircraft Systems and Manufacturing Inc
- [STC ST00984CH](https://openairdocs.org/stc/ST00984CH): Installation of Rockwell Collins FPI-955 Electronic Horizontal Situation Indicators (EHSI). Amphenol Cable and Interconnect Technologies Inc
- [STC ST01017CH](https://openairdocs.org/stc/ST01017CH): Installation of an AlliedSignal CAS-81 TCAS II System with dual AlliedSignal Mode S Transponders. Amphenol Cable and Interconnect Technologies Inc
- [STC ST01019CH](https://openairdocs.org/stc/ST01019CH): Installation of a Rockwell Collins GNLS-910 GPS Flight Management System. Amphenol Cable and Interconnect Technologies Inc
- [STC ST01167CH](https://openairdocs.org/stc/ST01167CH): Installation of an AlliedSignal MK-VII Enhanced Ground Proximity Warning System. Amphenol Cable and Interconnect Technologies, Inc
- [STC ST01404CH](https://openairdocs.org/stc/ST01404CH): Installation of Universal Avionics System Corporation Multi-Function Display. Amphenol Cable and Interconnect Technologies, Inc
- [STC ST01818CH](https://openairdocs.org/stc/ST01818CH): Installation of a Honeywell Enhanced Ground Proximity Warning System. Amphenol Cable and Interconnect Technologies, Inc
- [STC ST01887CH](https://openairdocs.org/stc/ST01887CH): Installation of GPS antenna provisions. Amphenol Cable and Interconnect Technologies, Inc
- [STC ST01936WI](https://openairdocs.org/stc/ST01936WI): Installation of LED lights. AeroLED's Holdings LLC
- [STC ST02876AT](https://openairdocs.org/stc/ST02876AT): Installation of a Free Flight Model 2101 I/O Approach Plus Global Positioning System (GPS), Universal Model MFD 640 Multi-function Display (MFD), and Provisions for an Aviation Communication & Surveillance Systems (ACSS) Terrain & Traffic Collision Avoidance System (TTCAS). Woven Electronics, LLC
- [STC ST00098IB](https://openairdocs.org/stc/ST00098IB): Introduction of ADS-B Out. STC Twenty One Limited
- [STC ST02896AT](https://openairdocs.org/stc/ST02896AT): Installation of a Kannad Model 406-AF Emergency Locator Transmittter (ELT). Woven Electronics LLC
- [STC ST03735AT](https://openairdocs.org/stc/ST03735AT): Installation of a LED Indirect Cabin Lighting System. Woven Electronics LLC
- [STC SA2534SW-D](https://openairdocs.org/stc/SA2534SW-D): Replacement of Switch assembly Int'l Inflatables Co. P/N 68748, with DME Corp. P/N L-140 in emergency evacuation slide lighting system. Astronics Luminescent Systems Inc. Lists DC-9 Series
- [STC SA2539SW-D](https://openairdocs.org/stc/SA2539SW-D): Replacement of light assembly, International Inflatables Co. P/N68555-1 with DME Corp. EL-104, EL-104A, and EL-104B in emergency slide lighting system. Astronics Luminescent Systems Inc. Lists DC-9 Series
- [STC SA863EA](https://openairdocs.org/stc/SA863EA): Incorporation of DME Corporation emergency evacuation slide lighting system. Astronics Luminescent Systems Inc. Lists DC-9 Series
- [STC ST02929AT](https://openairdocs.org/stc/ST02929AT): Installation of an Artex Model C406-1 Emergency Locator Transmitter (ELT). Woven Electronics LLC
- [STC ST03838AT](https://openairdocs.org/stc/ST03838AT): Installation of an Universal Avionics Application Server Unit (ASU) System Class II Electronic Flight Bag (EFB). Technical Aero Services Inc
- [STC SA1220NW](https://openairdocs.org/stc/SA1220NW): Installation of Universal flight data recorder. Honeywell International Inc
- [STC SA5920NM](https://openairdocs.org/stc/SA5920NM): Installation of 980-4100-HQUS Flight Data Recorder and Penny and Giles Quick Access Recorder in accordance with Document 755-3024, Rev. New-1, or later FAA approved revision. Honeywell International Inc
- [STC ST00074AT](https://openairdocs.org/stc/ST00074AT): Installation of a Bendix/King Mode S transponder. Honeywell International Inc
- [STC ST00075AT](https://openairdocs.org/stc/ST00075AT): Installation of a CAS-81 TCAS II. Honeywell International Inc
- [STC ST00791SE](https://openairdocs.org/stc/ST00791SE): Installation of a solid state cockpit voice recorder. Honeywell International Inc
- [STC ST01828AT](https://openairdocs.org/stc/ST01828AT): Installation of a RTA-83A VHF Communication System. Honeywell International Inc
- [STC SA3748SW](https://openairdocs.org/stc/SA3748SW): Installation of heat exchanger assembly (P/N 184060). Honeywell International Inc
- [STC SA4398SW](https://openairdocs.org/stc/SA4398SW): Modification of air to air heat exchanger (P/N 179450-2-2 or194110-1). Honeywell International Inc. Lists DC-9 Series
- [STC SA640NW](https://openairdocs.org/stc/SA640NW): Installation of contemporary deep rack interior. Safran Cabin Inc. Lists DC-9 Series
- [STC ST00939LA](https://openairdocs.org/stc/ST00939LA): Installation of passenger entertainment system. Burrana Inc. Lists DC-9 Series
- [STC ST03574AT](https://openairdocs.org/stc/ST03574AT): Installation of a Talon Aerospace Anti-Collision Light. Aaxico Technical Services Inc
- [STC ST04002AT](https://openairdocs.org/stc/ST04002AT): Installation of a Talon LED Replacement Wing and Tail Mounted Anti-Collision Lights. Aaxico Technical Services Inc
- [STC ST04177AT](https://openairdocs.org/stc/ST04177AT): Installation of a Talon Aerospace LED Replacement General Purpose Lamps. Aaxico Technical Services Inc
- [STC SA2410NM](https://openairdocs.org/stc/SA2410NM): Installation of a Hughes-Avicom Audio Tape Reproducer. Burrana Inc. Lists DC-9 Series
- [STC SA2169CE](https://openairdocs.org/stc/SA2169CE): Installation of King KNS 660 flight management system. Honeywell International Inc
- [STC SA4817NM](https://openairdocs.org/stc/SA4817NM): Installation of standard windshear systems. Honeywell International Inc
- [STC SA8047NM](https://openairdocs.org/stc/SA8047NM): Installation of Honeywell Digital air data computer (DADC). Honeywell International Inc
- [STC ST04340NY](https://openairdocs.org/stc/ST04340NY): Installation of TCAS 7.1 (ACAS II) upgrade of Prior Existing TCAS 7.0. Scandinavian Avionics Design ApS
- [STC SA8339SW](https://openairdocs.org/stc/SA8339SW): Installation of a fuselage nose radome shell. The NORDAM Group LLC
- [STC ST02636LA](https://openairdocs.org/stc/ST02636LA): Modification to upgrade the existing XS-950 Mode S Transponder system to add ADS-B Out. Aviation Communication and Surveillance Systems (ACSS) LLC
- [STC SA3327NM](https://openairdocs.org/stc/SA3327NM): Installation of Kevlar composite Aft Tip Fairing for vertical stabilizer. Aviation Technical Services

All 235: https://openairdocs.org/aircraft/N127NK/stcs.md

## Related

- Other Douglas DC-9-21 aircraft: https://openairdocs.org/model/douglas-dc-9-21/aircraft.md
- The Pratt & Whitney JT8D series engine: https://openairdocs.org/engine/pratt-whitney-jt8d-series.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.