# N400AH: 1975 Hiller UH-12E, registration cancelled 2003-04-22

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 22, 2003
- Status when cancelled: Triennial form not returned
- Airframe: [Hiller UH-12E](https://openairdocs.org/model/hiller-uh-12e) (registry code 4360122)
- Engine: [Lycoming TI0-540 series](https://openairdocs.org/engine/lycoming-ti0-540-series) (registry code 41533)
- Data sheets: [TCDS 4H11](https://openairdocs.org/tcds/4H11), [TCDS E14EA](https://openairdocs.org/tcds/E14EA) (OpenAirDocs)
- Serial number: 1177
- Year built: 1975
- Type of aircraft: Rotorcraft
- Engine type: Turbo-prop
- Airworthiness: Standard, normal
- Airworthiness date: May 9, 1983
- Certificate issued: January 21, 1987
- Last registry action: January 15, 2002
- Mode S code: A4ACA9
- Owner when cancelled: [Evans Conrad S](https://openairdocs.org/faa-owner/EVANS%20CONRAD%20S)
- Location: [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City)
- Owner type: Individual
- Owner's area on the map: 40.7068° N, 111.8557° W: Placed by OpenAirDocs at the center of ZIP code 84106, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N400AH
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=400AH
- Page: https://openairdocs.org/deregistered/N400AH-2003-04-22

From the FAA registry file of October 29, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Hiller UH-12E: https://openairdocs.org/model/hiller-uh-12e.md

## NTSB investigations (5)

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 DEN88LA046](https://openairdocs.org/ntsb/DEN88LA046), Jan 2, 1988: Hiller UH-12E (N400AH), Vernal, UT, substantial damage
- [NTSB DEN86LA016](https://openairdocs.org/ntsb/DEN86LA016), Nov 1, 1985: Hiller UH-12E (N400AH), Vernal, UT, substantial damage
- [NTSB DEN83LA204](https://openairdocs.org/ntsb/DEN83LA204), Aug 31, 1983: Hiller UH-12E (N400AH), Manning, ND, substantial damage
- [NTSB DEN81DTE08](https://openairdocs.org/ntsb/DEN81DTE08), Nov 17, 1981: Hiller UH12E (N400AH), Craig, CO, substantial damage
- [NTSB DEN79FTE64](https://openairdocs.org/ntsb/DEN79FTE64), Jul 24, 1979: Hiller 12E (N400AH), Longmont, CO, substantial damage

## FAA accident and incident reports (5)

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 19880102000119A](https://openairdocs.org/incident/19880102000119A), Jan 2, 1988: Hiller UH12E (N400AH), Vernal, UT, Substantial damage. Engine quit en route. Made hard autorotation landing on a road. Connecting rod broken from engine overtemp operation
- [Accident 19851101055799A](https://openairdocs.org/incident/19851101055799A), Nov 1, 1985: Hiller UH12E (N400AH), Vernal, UT, Substantial damage. Turbocharger failed, impeller lodged on shroud after retaining nut backed out. Turbocharger installation on STC.
- [Accident 19830831045459A](https://openairdocs.org/incident/19830831045459A), Aug 31, 1983: Hiller UH12E (N400AH), Manning, ND, Substantial damage. Lost engine power while pulling a long line with a high deck angle. Low fuel condition allowed fuel unporting.
- [Accident 19811117074319A](https://openairdocs.org/incident/19811117074319A), Nov 17, 1981: Hiller UH12E (N400AH), Craig, CO, Substantial damage. Made downwind pass while shooting coyote. RPM decayed, forced to land. Skid broke on hitting a root on landing.
- [Accident 19790724021779A](https://openairdocs.org/incident/19790724021779A), Jul 24, 1979: Hiller UH12E (N400AH), Johnstown, CO, Substantial damage. Ag pilot conducting spraying operation exhausted fuel and crashed during spray run.

## Other aircraft with N400AH

- [Registered now](https://openairdocs.org/aircraft/N400AH): Airbus Helicopters EC 130 T2, S/N 8249, built 2016

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