# N818SW: 1968 Alon A-2A

- Status: Valid registration
- Airframe: [Alon A-2A](https://openairdocs.org/model/alon-a-2a) (registry code 0540104, 2 seats)
- Engine: [Continental C90 series](https://openairdocs.org/engine/continental-c90-series) (registry code 17009)
- Data sheets: [TCDS A-787](https://openairdocs.org/tcds/A-787) (Univair Aircraft Corporation), [TCDS E-252](https://openairdocs.org/tcds/E-252) (Continental Aerospace Technologies, Inc.) (OpenAirDocs)
- Serial number: B-279
- Year built: 1968
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: February 13, 1968
- Certificate issued: August 31, 2026
- Expires: August 31, 2033
- Mode S code: AB28B9
- Registered owners: [Abbott Don W](https://openairdocs.org/faa-owner/ABBOTT%20DON%20W), [Longenhagen John H A](https://openairdocs.org/faa-owner/LONGENHAGEN%20JOHN%20H%20A)
- Location: [Sanibel, FL](https://openairdocs.org/faa-place/FL/Sanibel)
- Owner type: Co-owned
- Owner's area on the map: 26.4605° N, 82.1004° W: Placed by OpenAirDocs at the center of ZIP code 33957, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=818SW
- Page: https://openairdocs.org/aircraft/N818SW

From the FAA registry file of October 22, 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 Continental C90 model are included.

## ADs that may apply (OpenAirDocs): 16 in force

### Matched by airframe (Alon A-2A)

- [AD 2022-03-15](https://openairdocs.org/ad/2022-03-15): Fuel Quantity Indicator · Garmin G3X Touch Electronic Flight Instrument System (STC SA01899WI or SA02658SE). Effective Mar 21, 2022
- [AD 2012-08-06](https://openairdocs.org/ad/2012-08-06): Flight Controls · Univair 415-C, 415-CD, 415-D and 7 more. Effective Oct 3, 2012
- [AD 2003-21-01](https://openairdocs.org/ad/2003-21-01): Outer wing panels · Univair 415-C, 415-CD, 415-D and 7 more. Effective Dec 1, 2003
- [AD 2002-26-02](https://openairdocs.org/ad/2002-26-02): Wing Center Section · Univair 415-C, 415-CD, 415-D and 7 more. Effective Feb 14, 2003
- [AD 96-09-06](https://openairdocs.org/ad/96-09-06): Air Filter Assemblies · Maule Aerospace Technology 7ACA, 7ECA, 7FC and 180 more. Effective Jun 7, 1996

### Matched by engine (Continental C90 series)

- [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 98-17-11](https://openairdocs.org/ad/98-17-11): Crankshafts · Continental Motors A-65-3, A-65-8, A75-8 and 90 more. Effective Oct 19, 1998
- [AD 98-01-06](https://openairdocs.org/ad/98-01-06): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 184 more. Effective Feb 13, 1998
- [AD 94-05-05 R1](https://openairdocs.org/ad/94-05-05-R1): Cylinder Rocker · Continental Motors C-125-1, C-125-2, C145-2 and 59 more. Effective Feb 13, 1996
- [AD 93-22-05](https://openairdocs.org/ad/93-22-05): Carburetor Air Intake Housing Assemblies · Continental Motors C90-12F, C90-12FH, C90-12FJ and 22 more. Effective Dec 14, 1993
- [AD 93-19-04](https://openairdocs.org/ad/93-19-04): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 184 more. Effective Oct 18, 1993
- [AD 81-16-05](https://openairdocs.org/ad/81-16-05): Magnetos · Lycoming Engines AEIO-320-E1B, AEIO-320-E2B, AEIO-360-B1G6 and 234 more. Effective Aug 6, 1981
- [AD 81-07-06](https://openairdocs.org/ad/81-07-06): AC Fuel Pumps · Continental Motors A-65-1, A-65-12, A-65-12F and 60 more. Effective Apr 1, 1981
- [AD 80-06-05](https://openairdocs.org/ad/80-06-05): Magnetos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 254 more. Effective Mar 28, 1980
- [AD 69-24-03](https://openairdocs.org/ad/69-24-03): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 321 more. Effective Nov 29, 1969
- [AD 49-50-01](https://openairdocs.org/ad/49-50-01): Generator Drive Coupling Rubber Disc · Continental Motors C-125-1, C-125-2, C145-2 and 27 more

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

- [AD 94-18-04 R1](https://openairdocs.org/ad/94-18-04-R1) (historical): Outer Wing Panels · Univair 415-C, 415-CD, 415-D and 7 more. Effective Mar 24, 1995

## Information bulletins (advisory) (6 in force)

- [SAIB CE-14-03](https://openairdocs.org/saib/CE-14-03): Wing Spar Damage. Issued Nov 15, 2013
- [SAIB CE-04-69](https://openairdocs.org/saib/CE-04-69): . Issued Jun 9, 2004
- [SAIB NE-18-27](https://openairdocs.org/saib/NE-18-27): POWERPLANT  Rocker Shaft Boss Inspection. Issued Sep 10, 2018
- [SAIB NE-16-13](https://openairdocs.org/saib/NE-16-13): Powerplant - Prohibited use of sealant. Issued Mar 8, 2016
- [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 CE-98-21R1](https://openairdocs.org/saib/CE-98-21R1): . Issued Jun 10, 1998

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB ERA26LA089](https://openairdocs.org/ntsb/ERA26LA089), Dec 19, 2025: Alon A-2A (N818SW), Winter Haven, FL, substantial damage, investigation ongoing

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20251219020469A](https://openairdocs.org/incident/20251219020469A), Dec 19, 2025: Alon A-2A (N818SW), Winter Haven, FL, Substantial damage. Upon landing aircoupe at kgif, runway 23 at 9:18 am EST on December 19, 2025, while attempting to maintain directional control on the runway, a loud “snap”…

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs) (108, 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 (Alon A-2A)

- [STC SA02156CH](https://openairdocs.org/stc/SA02156CH): Installation of a 30-gallon fuel system. Duckboy America, LLC
- [STC SA12406WI](https://openairdocs.org/stc/SA12406WI): Installation of a Garmin AXIS Flight Display System. Garmin International Inc
- [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC
- [STC SA02636SE](https://openairdocs.org/stc/SA02636SE): Installation of Garmin GPS 175 Navigation System and GNX 375 Navigation System with ADS-B In/Out Transponder. Garmin International Inc
- [STC SA00079NY](https://openairdocs.org/stc/SA00079NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K008 on single and multi engine fixed wing light aircraft incorporating Teledyne Continental reciprocating engines of 450 horsepower or less. Airwolf Filter Corporation
- [STC SA01005DE](https://openairdocs.org/stc/SA01005DE): Installation of a EarthX ETX900-TSO Lithium battery. EarthX Inc
- [STC SA04046CH PAGE 2](https://openairdocs.org/stc/SA04046CH%20PAGE%202): Installation of L-3 GENESIS (TM) Electronic Standby Instrument System (ESI-500/MAG-500). Acron Aviation Inc
- [STC SA04378CH](https://openairdocs.org/stc/SA04378CH): Installation of an engine modified per STC SE04349CH. SureFly Partners Ltd
- [STC SA01757WI](https://openairdocs.org/stc/SA01757WI): To allow the use of UL91 or UL94 (minimum) grade aviation fuel. Swift Fuels LLC
- [STC SA04568CH](https://openairdocs.org/stc/SA04568CH): Installation of the uAvionix tailBeaconX, a tail mounted position light with integrated Automatic Dependent Surveillance - Broadcast (ADS-B) Out and 1090MHz Mode-S transponder functionality. uAvionix Corporation
- [STC SA02658SE](https://openairdocs.org/stc/SA02658SE): Installation of Garmin GI 275 Multi-Function Display System. Garmin International Inc
- [STC SA01967WI](https://openairdocs.org/stc/SA01967WI): Use of GAMI G100UL High Octane Unleaded Avgas. General Aviation Modifications Inc
- [STC SA02444AK](https://openairdocs.org/stc/SA02444AK): Approval of the L-3 Communications NGT 9000/9000R ADS-B system installed. ADS-B Technologies LLC
- [STC SA04550CH](https://openairdocs.org/stc/SA04550CH): Installation of firewall mounted Electric Fuel Transfer Pump, reroute of fuel transfer lines and removal of engine driven mechanical fuel transfer pump. Alpha Aviation Inc
- [STC SA01818WI](https://openairdocs.org/stc/SA01818WI): Installation of Garmin G5 Electronic Flight Instrument. Garmin International Inc
- [STC SA00410BO](https://openairdocs.org/stc/SA00410BO): Installation of an AV-30-C Multi-Mode Indicator. uAvionix Corporation
- [STC SA01831WI](https://openairdocs.org/stc/SA01831WI): To allow the use of UL91 (minimum) grade aviation fuel. Petersen Aviation Inc
- [STC SA3502WE](https://openairdocs.org/stc/SA3502WE): Installation of fiberglass nose bowl. Alpha Aviation Inc
- [STC SA04362CH](https://openairdocs.org/stc/SA04362CH): Installation of the uAvionix skyBeacon Automatic Dependent Surveillance-Broadcast (ADS-B) Out. uAvionix Corporation
- [STC SA02503AK](https://openairdocs.org/stc/SA02503AK): Installation of AMSAFE State of the Art Restraint System (SOARS) inflatable restraints. AMSAFE Inc
- [STC SA10077SC](https://openairdocs.org/stc/SA10077SC): Installation of push-button starter system. Hartzell Engine Technologies, LLC
- [STC SA00780SE](https://openairdocs.org/stc/SA00780SE): Installation of the True Lock Safety Retention Axle Lock Nut System. True Lock LLC
- [STC SA01246CH](https://openairdocs.org/stc/SA01246CH): Replace existing glass bowl gascolator with Skyport Services metal bowl Gascolator Part No. SS13100. Alpha Aviation Inc
- [STC SA01247CH](https://openairdocs.org/stc/SA01247CH): Replace existing main LG strut seal with MLG Oleo Restoration Kit. Alpha Aviation Inc
- [STC SA1097GL](https://openairdocs.org/stc/SA1097GL): Installation of single lamp landing light. Alpha Aviation Inc
- [STC SA1180GL](https://openairdocs.org/stc/SA1180GL): Installation of main and nose gear fairings. Alpha Aviation Inc
- [STC SA2230WE](https://openairdocs.org/stc/SA2230WE): Installation of main gear wheel fairings. Alpha Aviation Inc
- [STC SA11172SC](https://openairdocs.org/stc/SA11172SC): Installation of an ADS600-B Automatic Dependent Surveillance-Broadcast (ADS-B) Universal Access Transceiver (UAT) and Global Positioning System (GPS) antenna. NavWorx Inc
- [STC SA01768SE](https://openairdocs.org/stc/SA01768SE): Installation of an oil cooler system. Steve's Aircraft
- [STC SA02442AK PAGE 2](https://openairdocs.org/stc/SA02442AK%20PAGE%202): Approval of the L-3 Communications NGT 2000/2500 ADS-B system. ADS-B Technologies, LLC
- [STC SA01669CH](https://openairdocs.org/stc/SA01669CH): Installation of Challenger Reusable Air Filter. Challenger Aviation Products Inc
- [STC SA10921SC](https://openairdocs.org/stc/SA10921SC): Installation of an alternator and regulator as a replacement to existing OEM generators and mechanical voltage regulators. Hartzell Engine Technologies, LLC
- [STC SA02283SE PAGE 2](https://openairdocs.org/stc/SA02283SE%20PAGE%202): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30P. Electronics International Inc
- [STC SA02402SE PAGE 2](https://openairdocs.org/stc/SA02402SE%20PAGE%202): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) CGR-30C. Electronics International Inc
- [STC SA01026SE](https://openairdocs.org/stc/SA01026SE): Improved fuel gascolator assembly. Steve's Aircraft
- [STC SA02825NY PAGE 2](https://openairdocs.org/stc/SA02825NY%20PAGE%202): Installation of Aerospace Logic Aircraft Instruments. Aerospace Logic Inc
- [STC SA00068SE](https://openairdocs.org/stc/SA00068SE): Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1). Electronics International Inc
- [STC SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories. Electronics International Inc
- [STC SA01988SE](https://openairdocs.org/stc/SA01988SE): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) MVP-50P. Electronics International Inc
- [STC SA593CH](https://openairdocs.org/stc/SA593CH): Install Champion SlickSTART magneto booster system. Champion Aerospace LLC
- [STC SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc
- [STC SA00680SE](https://openairdocs.org/stc/SA00680SE): Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer. Electronics International
- [STC SA01158WI](https://openairdocs.org/stc/SA01158WI): Installation of Aero Enhancements UV250-1 Supplemental Instrument Panel Lightning System. Aero Enhancements Inc
- [STC SA2683NM](https://openairdocs.org/stc/SA2683NM): Installation of Precise Flight, Inc. stand-by vacuum system (SVS). Precise Flight Inc
- [STC SA00071SE](https://openairdocs.org/stc/SA00071SE): Cockpit sun visor installation. Rosen Sunvisor Systems LLC
- [STC SA01944CH](https://openairdocs.org/stc/SA01944CH): Modify airplane to fly on unleaded automotive gasoline, 87 minimum antiknock index, per ASTM Specification D-439 or D-4818 of any volatility class, A through E, or 82UL AVGAS per ASTM D-6227. Experimental Aircraft Association Inc
- [STC SA798GL](https://openairdocs.org/stc/SA798GL): Superseded by STC SA01944CH. Modify airplane to fly on unleaded automotive gasoline, 87 minimum antiknock index. EAA Aviation Foundation
- [STC SA1484GL](https://openairdocs.org/stc/SA1484GL): Installation of 30 gallon fuel system. Busch Ron
- [STC SA3503WE](https://openairdocs.org/stc/SA3503WE): Installation of fiberglass nose bowl. Busch Ron
- [STC SA489EA](https://openairdocs.org/stc/SA489EA): Installation of ARP Inc. carburetor ice detection system. Aircraft & Rotorcraft Products (ARP) Inc

All 108: https://openairdocs.org/aircraft/N818SW/stcs.md

## Related

- Other Alon A-2A aircraft: https://openairdocs.org/model/alon-a-2a/aircraft.md
- The Continental C90 series engine: https://openairdocs.org/engine/continental-c90-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.