# N979WC: 1988 Cessna 550 - Status: Valid registration - Airframe: Cessna 550 (registry code 2076604, TCDS A22CE (OpenAirDocs match)) - Engine: Pratt & Whitney Canada JT15D-4 series (registry code 52112) - Serial number: 550-0584 - Year built: 1988 - Type: Fixed wing multi engine - Airworthiness: Standard, transport - Airworthiness date: August 17, 2005 - Certificate issued: August 12, 2021 - Expires: August 31, 2028 - Mode S code: ADA70B - Registered owner: Tech 15 Air LLC - Location: Seeley Lake, MT - Owner's area on the map: 47.2210° N, 113.5405° W: Placed by OpenAirDocs at the center of ZIP code 59868, within about 9 miles (OpenAirDocs) - Page: https://openairdocs.org/aircraft/N979WC ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. ## ADs matched by airframe (Cessna 550) (OpenAirDocs) - [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 2025-07-01](https://openairdocs.org/ad/2025-07-01): Air Data Computer · Synthetic Vision Electronic Flight Information System (Arrow STC SR09595RC or ST01523WI). Effective May 15, 2025 - [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 2015-17-12](https://openairdocs.org/ad/2015-17-12): Air conditioning · Freon air conditioning system (Textron STC SA3849SW or 3 others). Effective Sep 29, 2015 - [AD 2013-09-11](https://openairdocs.org/ad/2013-09-11): Air Conditioning · Cessna 500, 501, 550 and 5 more. Effective Jul 5, 2013 - [AD 2007-11-17](https://openairdocs.org/ad/2007-11-17): Wires for the positive and negative terminal studs of the engine and/or auxiliary power unit (APU) fire extinguishing bottles. · Cessna 500, 501, 550 and 5 more. Effective Jul 6, 2007 - [AD 2006-19-04](https://openairdocs.org/ad/2006-19-04): Honeywell COM unit and Mode S transponder · Bombardier BD-700-1A10, BD-700-1A11, 550 and 26 more. Effective Oct 17, 2006 - [AD 2006-06-03](https://openairdocs.org/ad/2006-06-03): Airplane flight manual (AFM) · Cessna 500, 501, 550 and 3 more. Effective Apr 20, 2006 - [AD 2004-08-15](https://openairdocs.org/ad/2004-08-15): TAWS8000 terrain awareness warning systems (TAWS) · Cessna 421, 500, 501 and 18 more. Effective Jun 7, 2004 - [AD 2004-09-05](https://openairdocs.org/ad/2004-09-05): Brake Stator Disks · Cessna 500, 501, 550 and 1 more. Effective Jun 2, 2004 - [AD 2001-23-17](https://openairdocs.org/ad/2001-23-17): GNS 430 units · Cessna 172, 182, 206 and 209 more. Effective Dec 28, 2001 - [AD 2001-22-14](https://openairdocs.org/ad/2001-22-14): Fire Extinguishing System Bottle Cartridges · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 105 more. Effective Dec 10, 2001 - [AD 97-05-03 R1](https://openairdocs.org/ad/97-05-03-R1): Global Positioning Systems · BAE Systems Avro 146-RJ100A, BAe 146-200A, Jetstream Model 4101 and 27 more. Effective Apr 20, 1999 - [AD 98-25-02](https://openairdocs.org/ad/98-25-02): Top-mounted Antenna · Bell Helicopter Textron Canada 407, 172, 172A and 243 more. Effective Dec 22, 1998 - [AD 98-04-38](https://openairdocs.org/ad/98-04-38): AFM - Limitations Section - Icing · Cessna 500, 501, 550 and 2 more. Effective Mar 25, 1998 - [AD 95-25-10](https://openairdocs.org/ad/95-25-10): Outflow/Safety Valve · Cessna 441, 500, 550 and 1 more. Effective Jan 22, 1996 - [AD 95-22-01](https://openairdocs.org/ad/95-22-01): Fluorescent Lighting System · Aerospace Lighting Fluorescent lighting systems, A310-203, A310-204 and 74 more. Effective Dec 4, 1995 - [AD 94-19-06](https://openairdocs.org/ad/94-19-06): Crew Oxygen Masks · 328 Support Services 328-100, 328-300, 500 and 17 more. Effective Oct 6, 1994 - [AD 94-01-04](https://openairdocs.org/ad/94-01-04): Traffic Alert and Collision Avoidance System · Airbus A300 B4-601, A300 B4-603, A300 B4-605R and 136 more. Effective Feb 4, 1994 - [AD 93-05-15](https://openairdocs.org/ad/93-05-15): Thrust Reverser Throttle Load Limiter · Cessna 500, 501, 550 and 4 more. Effective Apr 23, 1993 - [AD 90-07-10 R1](https://openairdocs.org/ad/90-07-10-R1): Air Conditioning System · Cessna 550, 551 and S550 with STC SA2698SW. Effective May 29, 1990 - [AD 90-06-13](https://openairdocs.org/ad/90-06-13): Vertical Gyro · Bombardier DHC-8-101, DHC-8-102, DHC-8-103 and 14 more. Effective Mar 30, 1990 - [AD 89-16-10](https://openairdocs.org/ad/89-16-10): Fuel Flow Transmitter · Cessna 550 and 551. Effective Sep 7, 1989 - [AD 88-06-02](https://openairdocs.org/ad/88-06-02): Electrical Power · Cessna 550 and S550. Effective May 10, 1988 - [AD 80-09-09](https://openairdocs.org/ad/80-09-09): Dual Flight Director Installation · Cessna 500, 501, 550 and 1 more. Effective May 12, 1980 - [AD 79-12-06](https://openairdocs.org/ad/79-12-06): Upper & Lower Spar Cap Stems · Cessna 500, 501, 550 and 1 more. Effective Apr 10, 1980 Historical (superseded or no longer in force): AD 2006-04-10 ## ADs matched by engine (Pratt & Whitney Canada JT15D-4 series) (OpenAirDocs) - [AD 93-18-08](https://openairdocs.org/ad/93-18-08): High Pressure Turbine (HPT) Assembly · Pratt & Whitney Canada JT15D-1, JT15D-1A, JT15D-1B and 4 more. Effective Nov 24, 1993 - [AD 91-15-02](https://openairdocs.org/ad/91-15-02): Gas Generator Case · Pratt & Whitney Canada JT15D-4B. Effective Aug 22, 1991 - [AD 87-10-01](https://openairdocs.org/ad/87-10-01): Fan Blades · Pratt & Whitney Canada JT15D-1, JT15D-1A, JT15D-1B and 3 more. Effective Jul 15, 1988 - [AD 78-17-06](https://openairdocs.org/ad/78-17-06): Fuel Manifold Adapter Assemblies · Pratt & Whitney Canada JT15D-4. Effective Aug 31, 1978 - [AD 74-26-05](https://openairdocs.org/ad/74-26-05): Fuel Control Units · Pratt & Whitney Canada JT15D-1 and JT15D-4. Effective Jan 2, 1975 ## Information bulletins (advisory) - [SAIB AIR-21-15R1](https://openairdocs.org/saib/AIR-21-15R1): Navigation System - [SAIB AIR-21-15](https://openairdocs.org/saib/AIR-21-15): Navigation System - [SAIB NM-14-08](https://openairdocs.org/saib/NM-14-08): Fuselage: Aerodynamic Fairings - [SAIB CE-12-19](https://openairdocs.org/saib/CE-12-19): Fuel: Aircraft Fuel System on Cessna Model 500/501/550 Airplanes - [SAIB CE-10-49R1](https://openairdocs.org/saib/CE-10-49R1): Equipment/Furnishings Drain Mast Heater - [SAIB CE-10-49](https://openairdocs.org/saib/CE-10-49): Equipment/Furnishings Drain Mast Heater - [SAIB NM-10-13](https://openairdocs.org/saib/NM-10-13): Navigation: Flight Management System --- From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.