# N920AU: 1963 Lockheed P-3A

- Status: Valid registration
- Airframe: [Lockheed P-3A](https://openairdocs.org/model/lockheed-p-3a) (registry code 5260103, 10 seats)
- Engine: [Allison T56-10 series](https://openairdocs.org/engine/allison-t56-10-series) (registry code 03037)
- Data sheets: [TCDS A32NM](https://openairdocs.org/tcds/A32NM) (USDA Forest Service) (OpenAirDocs)
- Serial number: 150513
- Year built: 1963
- Type: Fixed wing multi engine
- Engine type: Turbo-prop
- Airworthiness: Restricted, agriculture and pest control
- Airworthiness date: March 24, 2005
- Certificate issued: November 7, 2013
- Expires: November 30, 2029
- Mode S code: ACBE3D
- Registered owner: [United Aeronautical Corp](https://openairdocs.org/faa-owner/UNITED%20AERONAUTICAL%20CORP)
- Location: [North Hollywood, CA](https://openairdocs.org/faa-place/CA/North%20Hollywood)
- Owner type: Corporation
- Owner's area on the map: 34.2073° N, 118.4010° W: Placed by OpenAirDocs at the center of ZIP code 91605, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=920AU
- Page: https://openairdocs.org/aircraft/N920AU

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 Allison T56-10 model are included.

## ADs that may apply (OpenAirDocs): 2 in force

### Matched by airframe (Lockheed P-3A)

- [AD 2018-11-02](https://openairdocs.org/ad/2018-11-02): Flight Controls · Lockheed Martin 188A, 188C, P3A and 2 more. Effective May 23, 2018
- [AD 2014-11-06](https://openairdocs.org/ad/2014-11-06): Stabilizers, Wings · Aero Union P3A and P-3A. Effective Jul 8, 2014

### Matched by engine (Allison T56-10 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N920AU.

## FAA accident and incident reports

None matched to N920AU.

## Service difficulty reports (1)

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 2009FA0000238](https://openairdocs.org/sdr/2009FA0000238), Mar 20, 2009: FITTING. CRACKED. DURING PHASE DEPOT INSP THE LWR FWD LT RING FITTING, PN 903220-1 WAS FOUND FRACTURED THRU THE HORIZONTAL BOTTOM FLANGE AT THE FILLET NUT PLATE HOLE AND HAD PROP

## STCs that may be installed (OpenAirDocs) (5)

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 (Lockheed P-3A)

- [STC ST04186AT](https://openairdocs.org/stc/ST04186AT): Incorporation of P3A Airworthiness Limitation Section for aircraft operated in Restricted Category for the special mission of aerial dispensing of liquids. Avenger Aerospace Solutions Inc
- [STC SA4861NM](https://openairdocs.org/stc/SA4861NM): Installation of Retardant Tanks for the special purpose of Forest and Wildlife Conservation. United Aeronautical Corporation
- [STC SA6012NM](https://openairdocs.org/stc/SA6012NM): Installation of a Champion or Unison engine ignition system. United Aeronautical Corporation
- [STC ST03718AT](https://openairdocs.org/stc/ST03718AT): Incorporation of P3A Airworthiness Limitation Section for aircraft operated in Restricted Category for the special mission of aerial dispensing of liquids in accordance with Avenger Aircraft and Services Report No. AAS-MDL-09-002, Revision NC dated April 30, 2009, or later FAA approved revision. Avenger Aircraft and Services
- [STC SA308EA](https://openairdocs.org/stc/SA308EA): Installation of carburetor ice detection system 105AP in single and twin engine aircraft and single engine helicopters powered by Continental, Franklin, and Lycoming type engines equipped with Marvel-Schebler MA-2, MA-3, MA-4, MA-4-5, MA-6 and HA-6 series carburetors. (Normal,Utility and Acrobatic Category airplanes and helicopters equipped with engines and carburetors as described.). Alfred R Puccinelli

## Related

- Other Lockheed P-3A aircraft: https://openairdocs.org/model/lockheed-p-3a/aircraft.md
- The Allison T56-10 series engine: https://openairdocs.org/engine/allison-t56-10-series.md

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