# N555NG: 1949 Ryan NAVION A

- Status: Valid registration
- Airframe: [Ryan NAVION A](https://openairdocs.org/model/ryan-navion-a) (registry code 6150162, 5 seats)
- Engine: [Continental IO-550-B](https://openairdocs.org/engine/continental-io-550-b) (registry code 17208)
- Data sheets: [TCDS A-782](https://openairdocs.org/tcds/A-782) (Sierra Hotel Aero Inc.), [TCDS E3SO](https://openairdocs.org/tcds/E3SO) (Continental Aerospace Technologies, Inc.) (OpenAirDocs)
- Serial number: NAV-4-1829
- Year built: 1949
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard, utility
- Airworthiness date: March 21, 1956
- Certificate issued: August 31, 2022
- Expires: August 31, 2029
- Mode S code: A71331
- Registered owners: [Pattillo Jon S](https://openairdocs.org/faa-owner/PATTILLO%20JON%20S), [Pattillo Elaine J](https://openairdocs.org/faa-owner/PATTILLO%20ELAINE%20J)
- Location: [Spotsylvania, VA](https://openairdocs.org/faa-place/VA/Spotsylvania)
- Owner type: Co-owned
- Owner's area on the map: 38.1881° N, 77.7016° W: Placed by OpenAirDocs at the center of ZIP code 22551, within about 7 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=555NG
- Page: https://openairdocs.org/aircraft/N555NG

From the FAA registry file of October 21, 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.

## ADs that may apply (OpenAirDocs): 46 in force

### Matched by airframe (Ryan NAVION A)

- [AD 2022-03-15](https://openairdocs.org/ad/2022-03-15): Fuel Quantity Indicator · Garmin G3X Touch Electronic Flight Instrument System (STC SA01899WI). Effective Mar 21, 2022
- [AD 2008-05-14](https://openairdocs.org/ad/2008-05-14): Fuel system · Sierra Hotel Aero Navion A (Army L-17B and L-17C), Navion B, Navion D and 5 more. Effective Apr 16, 2008
- [AD 2005-01-19](https://openairdocs.org/ad/2005-01-19): Mode S transponders · GARMIN International GTX 330D, GTX 330, GTX 33D and 830 more. Effective Feb 23, 2005
- [AD 96-12-22](https://openairdocs.org/ad/96-12-22): Full Flow Engine Oil Adapter · Bellanca CH-300 Pacemaker, 120, 140 and 361 more. Effective Jul 31, 1996
- [AD 79-07-02](https://openairdocs.org/ad/79-07-02): Batteries · Aircraft Parts & Development A, A-2, A-3 and 149 more. Effective Apr 3, 1979
- [AD 75-05-02](https://openairdocs.org/ad/75-05-02): Engine Oil · Beryl D Shannon Aviation Specialties Engine Crankcase… (D'Shannon Products STC SA2653WE). Effective Feb 21, 1975
- [AD 68-20-06](https://openairdocs.org/ad/68-20-06): Rudder Horn Inspection · Sierra Hotel Aero Navion A (Army L-17B and L-17C), Navion B, Navion D and 5 more. Effective Oct 3, 1968
- [AD 62-03-03](https://openairdocs.org/ad/62-03-03): Landing Gear Selector Valve Fitting · Sierra Hotel Aero Navion A (Army L-17B and L-17C), Navion B, Navion D and 4 more. Effective Mar 6, 1962
- [AD 63-21-05](https://openairdocs.org/ad/63-21-05): Main and Nose Retraction Links · American Navion Society D-16, D-16A, 480 and 8 more
- [AD 59-06-04](https://openairdocs.org/ad/59-06-04): Hydraulic Actuating Cylinders · Sierra Hotel Aero Navion (Army L-17A), Navion A (Army L-17B and L-17C), Navion B and 1 more
- [AD 56-03-03](https://openairdocs.org/ad/56-03-03): Wing Rear Spar Fitting Inspection · Sierra Hotel Aero Navion (Army L-17A), Navion A (Army L-17B and L-17C) and Navion B
- [AD 55-01-01](https://openairdocs.org/ad/55-01-01): Fuselage Frame Cracks · Sierra Hotel Aero Navion (Army L-17A), Navion A (Army L-17B and L-17C) and Navion B
- [AD 54-18-01](https://openairdocs.org/ad/54-18-01): Wing-to-Fuselage Attachment · Sierra Hotel Aero Navion (Army L-17A), Navion A (Army L-17B and L-17C) and Navion B
- [AD 53-08-01](https://openairdocs.org/ad/53-08-01): Horizontal Stabilizer Fitting · Sierra Hotel Aero Navion (Army L-17A), Navion A (Army L-17B and L-17C) and Navion B
- [AD 52-26-01](https://openairdocs.org/ad/52-26-01): Stabilizer Spar Web · Sierra Hotel Aero Navion (Army L-17A), Navion A (Army L-17B and L-17C) and Navion B
- [AD 52-24-01](https://openairdocs.org/ad/52-24-01): Aileron Control Chain Guard · Sierra Hotel Aero Navion (Army L-17A), Navion A (Army L-17B and L-17C) and Navion B
- [AD 51-07-01](https://openairdocs.org/ad/51-07-01): Throttle Housing · Sierra Hotel Aero Navion (Army L-17A), Navion A (Army L-17B and L-17C) and Navion B
- [AD 50-10-02](https://openairdocs.org/ad/50-10-02): Air Intake Hose · Sierra Hotel Aero Navion (Army L-17A), Navion A (Army L-17B and L-17C) and Navion B
- [AD 49-28-01](https://openairdocs.org/ad/49-28-01): Unsatisfactory Spinner · Sierra Hotel Aero Navion (Army L-17A) and Navion A (Army L-17B and L-17C)
- [AD 49-12-02](https://openairdocs.org/ad/49-12-02): Fuel Pumps · Sierra Hotel Aero Navion (Army L-17A) and Navion A (Army L-17B and L-17C)
- [AD 49-11-01](https://openairdocs.org/ad/49-11-01): Carter Fuel Pump Rework · Sierra Hotel Aero Navion (Army L-17A) and Navion A (Army L-17B and L-17C)
- [AD 49-09-02](https://openairdocs.org/ad/49-09-02): Booster Pump Rework · Sierra Hotel Aero Navion (Army L-17A) and Navion A (Army L-17B and L-17C)
- [AD 49-05-03](https://openairdocs.org/ad/49-05-03): Continental Engines Bearing Inserts · Sierra Hotel Aero Navion (Army L-17A) and Navion A (Army L-17B and L-17C)

### Matched by engine (Continental IO-550-B)

- [AD 2023-17-04](https://openairdocs.org/ad/2023-17-04): Reciprocating Engine Oil System · F & M Enterprises' Model C6LC, C6LC-S or C6LC-L oil filter… (Stratus Tool Technologies STC SE09356SC or 2 others). Effective Oct 26, 2023
- [AD 2023-09-09](https://openairdocs.org/ad/2023-09-09): Exhaust Turbine System (Recip) · Aerostar PA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601), PA-60-601P (Aerostar 601P) and 292 more. Effective Jul 17, 2023
- [AD 2023-05-16](https://openairdocs.org/ad/2023-05-16): Reciprocating Engine Power Section · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 147 more. Effective Mar 15, 2023
- [AD 2023-02-12](https://openairdocs.org/ad/2023-02-12): Engine Air Intake System · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 127 more. Effective Feb 17, 2023
- [AD 2022-16-03](https://openairdocs.org/ad/2022-16-03): Engine (RECIPROCATING) · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-F and 236 more. Effective Aug 15, 2022
- [AD 2016-16-12](https://openairdocs.org/ad/2016-16-12): Cylinder assemblies · Continental Motors LTSIO-520-AE, TSIO-520-A, TSIO-520-AE and 89 more. Effective Sep 15, 2016
- [AD 2014-05-29](https://openairdocs.org/ad/2014-05-29): SAP replacement parts manufacturer approval (PMA) investment cast cylinder assemblies · Continental Motors TSIO-520-A, TSIO-520-AE, TSIO-520-AF and 55 more. Effective Apr 25, 2014
- [AD 2012-03-06](https://openairdocs.org/ad/2012-03-06): Fuel servo diaphragm · Continental Motors 6-260-A, 6-285-A, 6-285-B and 482 more. Effective Feb 24, 2012
- [AD 2010-11-04](https://openairdocs.org/ad/2010-11-04): Hydraulic lifters · Continental Motors FSO-470-A, GIO-470-A, GTSIO-520-C and 190 more. Effective Jun 16, 2010
- [AD 2009-19-07](https://openairdocs.org/ad/2009-19-07): EQ3 cylinders · Continental Motors IO-470-C, IO-470-D, IO-470-E and 72 more. Effective Oct 7, 2009
- [AD 2007-04-19 R1](https://openairdocs.org/ad/2007-04-19-R1): SAP cylinder assemblies · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 314 more. Effective May 7, 2007
- [AD 2004-08-10](https://openairdocs.org/ad/2004-08-10): Serial-numbered (SN) cylinders · Modify Teledyne Continental TSIO-520-NB engine (RAM Aircraft Limited Partnership STC SE09104SC or 4 others). Effective May 5, 2004
- [AD 2000-23-21](https://openairdocs.org/ad/2000-23-21): Crankshaft · Continental Motors IO-360-A, IO-360-AB, IO-360-B and 164 more. Effective Dec 12, 2000
- [AD 99-19-01](https://openairdocs.org/ad/99-19-01): No. 2 and No. 5 Crankshaft Inspections · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 127 more. Effective Sep 30, 1999
- [AD 93-16-15](https://openairdocs.org/ad/93-16-15): Fuel Pump Drive Shaft · Continental Motors IO-520-B, IO-520-BA, IO-520-BB and 27 more. Effective Dec 14, 1993
- [AD 93-08-17](https://openairdocs.org/ad/93-08-17): Oil Pick-Up Tube · Continental Motors IO-470-A, IO-470-C, IO-470-D and 104 more. Effective Aug 23, 1993
- [AD 93-10-02](https://openairdocs.org/ad/93-10-02): Missing Cylinder Valve Retainer Key · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 180 more. Effective Aug 12, 1993
- [AD 91-19-03](https://openairdocs.org/ad/91-19-03): Oil Filter · Continental Motors 6-285-A, 6-285-B, 6-285-BA and 169 more. Effective Sep 29, 1991
- [AD 88-17-03](https://openairdocs.org/ad/88-17-03): Starter Adapter Shaftgear Assembly · Continental Motors IO-520-BA, IO-520-BB, IO-550-B and 4 more. Effective Aug 10, 1988
- [AD 88-03-06](https://openairdocs.org/ad/88-03-06): Oil Filter · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 155 more. Effective Apr 15, 1988
- [AD 86-13-04 R3](https://openairdocs.org/ad/86-13-04-R3): Cylinder Assemblies · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 44 more. Effective Feb 24, 1988
- [AD 87-14-02](https://openairdocs.org/ad/87-14-02): Starter Adapter Shaftgear · Continental Motors IO-520-BA, IO-520-BB, IO-550-B and 4 more. Effective Oct 5, 1987
- [AD 98-01-08](https://openairdocs.org/ad/98-01-08): Exhaust Roller Rocker Arm · Roller rocker arm P/N PE 92I intake and PE92E exhaust (Performance Engineering STC SE8594SW)

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

- [AD 2023-04-08](https://openairdocs.org/ad/2023-04-08) (historical): Reciprocating Engine Power Section · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 141 more. Effective Feb 23, 2023
- [AD 2022-04-04](https://openairdocs.org/ad/2022-04-04) (historical): Reciprocating Engine Oil System · F & M Enterprises' Model C6LC, C6LC-S or C6LC-L oil filter… (Stratus Tool Technologies STC SE09356SC or 2 others). Effective Mar 29, 2022
- [AD 2009-24-52](https://openairdocs.org/ad/2009-24-52) (historical): Hydraulic lifters · Continental Motors FSO-470-A, GIO-470-A, GTSIO-520-C and 192 more
- [AD 2009-16-03](https://openairdocs.org/ad/2009-16-03) (historical): Cylinder assemblies · Continental Motors IO-520-A, IO-520-B, IO-520-BA and 55 more. Effective Sep 9, 2009
- [AD 2000-08-51](https://openairdocs.org/ad/2000-08-51) (historical): Crankshaft · Teledyne Continental Motors IO-360-A, IO-360-AB, IO-360-B and 158 more
- [AD 99-09-17](https://openairdocs.org/ad/99-09-17) (historical): Crankshaft · Teledyne Continental Motors IO-470-A, IO-470-C, IO-470-D and 114 more

## Information bulletins (advisory) (14 in force)

- [SAIB AIR-22-13](https://openairdocs.org/saib/AIR-22-13): Landing Gear Components. Issued May 27, 2022
- [SAIB SW-18-31](https://openairdocs.org/saib/SW-18-31): NAVIGATION, ATTITUDE, AND DIRECTION DATA SYSTEM. Issued Nov 21, 2018
- [SAIB CE-06-11R1](https://openairdocs.org/saib/CE-06-11R1): Fuel system selector valves. Issued Mar 14, 2007
- [SAIB CE-05-46](https://openairdocs.org/saib/CE-05-46): . Issued Apr 1, 2005
- [SAIB NE-20-05](https://openairdocs.org/saib/NE-20-05): POWERPLANT - Engine Camshaft Gear Tooth Fracture. Issued Apr 6, 2020
- [SAIB NE-18-16](https://openairdocs.org/saib/NE-18-16): POWERPLANT  Alternator Drive Coupling. Issued Jun 20, 2018
- [SAIB NE-17-11](https://openairdocs.org/saib/NE-17-11): POWERPLANT  Engine damage as a result of kickback. Issued May 10, 2017
- [SAIB NE-16-13](https://openairdocs.org/saib/NE-16-13): Powerplant - Prohibited use of sealant. Issued Mar 8, 2016
- [SAIB NE-13-15](https://openairdocs.org/saib/NE-13-15): Engine Controls: Continental Motors, Inc. (CMI) Throttle and Mixture Control Levers. Issued Feb 8, 2013
- [SAIB NE-13-04](https://openairdocs.org/saib/NE-13-04): Continental Motors, Inc. (CMI) Connecting Rod Piston Pin Bushing Inspection. Issued Oct 31, 2012
- [SAIB NE-10-09](https://openairdocs.org/saib/NE-10-09): Reciprocating Engine Power Section: Hydraulic Valve Lifters. Issued Nov 20, 2009
- [SAIB NE-10-07](https://openairdocs.org/saib/NE-10-07): Reciprocating Engine Cylinder: Identification Information for Superior Air Parts, PMA Cylinder Heads for Teledyne Continental Motors (TCM) IO-520, TSIO-520,and IO-550 Series Engines.. Issued Nov 2, 2009
- [SAIB NE-09-08](https://openairdocs.org/saib/NE-09-08): Reciprocating Engine Cylinder Section. Issued Jan 30, 2009
- [SAIB NE-07-09R1](https://openairdocs.org/saib/NE-07-09R1): Periodic Inspections of ECi Cylinder Assemblies for Cracks in the Aluminum Head. Issued Mar 21, 2007

## NTSB investigations

None matched to N555NG.

## FAA accident and incident reports

None matched to N555NG.

## Service difficulty reports

None filed for this aircraft.

## Related

- Other Ryan NAVION A aircraft: https://openairdocs.org/model/ryan-navion-a/aircraft.md
- STCs for the Ryan NAVION A: https://openairdocs.org/model/ryan-navion-a/stcs.md
- The Continental IO-550-B engine: https://openairdocs.org/engine/continental-io-550-b.md

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