# N1557A: North American-Martin T-28A

- Status: Valid registration
- Airframe: [North American-Martin T-28A](https://openairdocs.org/model/north-american-martin-t-28a) (registry code 6402505, 2 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Data sheets: [TCDS AR-30](https://openairdocs.org/tcds/AR-30) (Thompson Aircraft Sales) (OpenAirDocs)
- Serial number: 1300DM
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Restricted, other
- Airworthiness date: April 20, 1978
- Certificate issued: April 12, 2021
- Expires: April 30, 2028
- Mode S code: A0E010
- Registered owner: [Lnl Aviation Inc](https://openairdocs.org/faa-owner/LNL%20AVIATION%20INC)
- Location: [Grandville, MI](https://openairdocs.org/faa-place/MI/Grandville)
- Owner type: Corporation
- Owner's area on the map: 42.8786° N, 85.7682° W: Placed by OpenAirDocs at the center of ZIP code 49418, 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=1557A
- Page: https://openairdocs.org/aircraft/N1557A

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.

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

### Matched by airframe (North American-Martin T-28A)

- [AD 61-05-05](https://openairdocs.org/ad/61-05-05): R-1300-1A Engines · Thompson Aircraft Sales T-28A. Effective Mar 4, 1961
- [AD 58-22-02](https://openairdocs.org/ad/58-22-02): Landing Gear Trunnion Shaft · Thompson Aircraft Sales T-28A

### Matched by engine (Amateur-built UNKNOWN ENG)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N1557A.

## FAA accident and incident reports

None matched to N1557A.

## 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) (11)

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 (North American-Martin T-28A)

- [STC SA01967WI](https://openairdocs.org/stc/SA01967WI): Use of GAMI G100UL High Octane Unleaded Avgas. General Aviation Modifications Inc
- [STC SA01406NY](https://openairdocs.org/stc/SA01406NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K017 on single and multi-engine fixed light aircraft and rotary wing. Airwolf Filter Corporation
- [STC SA2586NM](https://openairdocs.org/stc/SA2586NM): Installation of J.P. Instruments temperature monitoring systems. J P Instruments
- [STC SA02428SE](https://openairdocs.org/stc/SA02428SE): Installation of an Air Stream Switch for an electric time recording device on non-pressurized aircraft. Henry F Rogers/David E Polley
- [STC SA1315WE](https://openairdocs.org/stc/SA1315WE): Installation of Mixture Monitor (exhaust gas temperature probe, gage and selector) in accordance with Delta Products Part Lists A-192 and A-193, or in accordance with Tri-Star Corporation Mixture Monitor Installation Instructions dated December 9, 1981, or later FAA approved revision and/or Drawing List MM-127 dated November 15, 1981, or later FAA approved revision in aircraft models listed in Master Eligibility List P-80-A-6 revised March 29, 1968, copy attached, or later FAA approved revision. Universal Corporation
- [STC SA1207GL](https://openairdocs.org/stc/SA1207GL): Installation of a fuel flow meter and totalizer system. Shadin Avionics
- [STC SA4-736](https://openairdocs.org/stc/SA4-736): Modification of lower aft access door and installation of brakets and mounts for K-25 camera. Carma Manufacturing Co
- [STC SA4-744](https://openairdocs.org/stc/SA4-744): Camera. Avia Union
- [STC SA4-775](https://openairdocs.org/stc/SA4-775): Mark AN-3 camera in left wing. Hammon Aircraft Corp
- [STC SA4-797](https://openairdocs.org/stc/SA4-797): Fabrication and installation of camera mount and K-25 camra. Hamilton Aviation Inc
- [STC SA91WE](https://openairdocs.org/stc/SA91WE): Camera. Air Fab

## Related

- Other North American-Martin T-28A aircraft: https://openairdocs.org/model/north-american-martin-t-28a/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.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.