# N1157H: Yakovlev YAK-9U-M

- Status: Valid registration
- Airframe: [Yakovlev YAK-9U-M](https://openairdocs.org/model/yakovlev-yak-9u-m) (registry code 05603QW, 1 seats)
- Engine: [Allison V1710 series](https://openairdocs.org/engine/allison-v1710-series) (registry code 03001)
- Serial number: 0470402
- Type: Fixed wing single engine
- Engine type: Turbo-shaft
- Airworthiness: Experimental, exhibition, racing
- Airworthiness date: September 8, 2003
- Certificate issued: October 25, 2018
- Expires: October 31, 2028
- Mode S code: A0421B
- Registered owner: [Yakkin 2 Inc](https://openairdocs.org/faa-owner/YAKKIN%202%20INC)
- Location: [Lewes, DE](https://openairdocs.org/faa-place/DE/Lewes)
- Owner type: Corporation
- Owner's area on the map: 38.7287° N, 75.1685° W: Placed by OpenAirDocs at the center of ZIP code 19958, 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=1157H
- Page: https://openairdocs.org/aircraft/N1157H

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 V1710 model are included.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Yakovlev YAK-9U-M)

None in force.

### Matched by engine (Allison V1710 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N1157H.

## 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.

- [Incident 19970411012949I](https://openairdocs.org/incident/19970411012949I), Apr 11, 1997: Yaklev YAK11 (N1157H), Livermore, CA. Narrative: after take-off and subsequent level-off for test flight of experimental class yakovlev 9, the PIC noted oil pressure starting to drop off. PIC…

## 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)

None matched to this aircraft's models.

## Earlier aircraft with N1157H

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N1157H before.

- [Cancelled 1990-08-10](https://openairdocs.org/deregistered/N1157H-1990-08-10): Piper PA-28-140, S/N 287725133. Triennial form not returned
- [Cancelled 1957-03-07](https://openairdocs.org/deregistered/N1157H-1957-03-07): Aeronca 15AC, S/N 15AC-170, built 1948. Exported to Canada. Owner: [Morean William E](https://openairdocs.org/faa-owner/MOREAN%20WILLIAM%20E), [Royal Oak, MI](https://openairdocs.org/faa-place/MI/Royal%20Oak)

## Related

- Other Yakovlev YAK-9U-M aircraft: https://openairdocs.org/model/yakovlev-yak-9u-m/aircraft.md
- The Allison V1710 series engine: https://openairdocs.org/engine/allison-v1710-series.md

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