# N146CS: Lockheed P3B

- Status: Valid registration
- Airframe: [Lockheed P3B](https://openairdocs.org/model/lockheed-p3b) (registry code 5260217, 12 seats)
- Engine: [Allison T56-A-15 series](https://openairdocs.org/engine/allison-t56-a-15-series) (registry code 03023)
- Data sheets: [TCDS T00006LA](https://openairdocs.org/tcds/T00006LA) (United Aeronautical Corporation) (OpenAirDocs)
- Serial number: 5286
- Type: Fixed wing multi engine
- Engine type: Turbo-prop
- Airworthiness: Experimental, research and development
- Airworthiness date: March 9, 1989
- Certificate issued: December 11, 2017
- Expires: December 31, 2027
- Mode S code: A0B93D
- Registered owner: [United States Customs And Border Protection](https://openairdocs.org/faa-owner/UNITED%20STATES%20CUSTOMS%20AND%20BORDER%20PROTECTION)
- Location: [Jacksonville, FL](https://openairdocs.org/faa-place/FL/Jacksonville)
- Owner type: Government
- Owner's area on the map: 30.2586° N, 81.8782° W: Placed by OpenAirDocs at the center of ZIP code 32221, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=146CS
- Page: https://openairdocs.org/aircraft/N146CS

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. The registry lists only the engine series, so ADs for every Allison T56-A-15 model are included.

## ADs that may apply (OpenAirDocs): 1 in force

### Matched by airframe (Lockheed P3B)

- [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

### Matched by engine (Allison T56-A-15 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N146CS.

## FAA accident and incident reports

None matched to N146CS.

## Service difficulty reports

None filed for this aircraft.

## Related

- Other Lockheed P3B aircraft: https://openairdocs.org/model/lockheed-p3b/aircraft.md
- STCs for the Lockheed P3B: https://openairdocs.org/model/lockheed-p3b/stcs.md
- The Allison T56-A-15 series engine: https://openairdocs.org/engine/allison-t56-a-15-series.md

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