# NTSB ANC86LA058: Hiller 12-C, N49983, Palmer, AK, May 18, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 18, 1986, 13:15 local (21:15 UTC)
- Place: Palmer, AK
- Coordinates: 61.620834, -148.980239 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.6208&lon=-148.9802&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4662
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC86LA058
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4662/pdf
- Page: https://openairdocs.org/ntsb/ANC86LA058

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of control - in flight, hover
  - rotorcraft flight controls - not maintained, pilot in command (cause)
  - in-flight planning/decision - improper, pilot in command (cause)
  - aircraft handling - not maintained, pilot in command (cause)
- In flight collision with terrain/water, hover
- Roll over, hover

## Analysis

THE PILOT STATED THAT HE DREW TOO MUCH ROTOR PITCH FOR THE H.P. AVAILABLE. THE HELICOPTER LOST CONTROL AND ROLLED OVER ON ITS SIDE.

## Aircraft

- Registration: [N49983](https://openairdocs.org/aircraft/N49983), registered now, S/N 850 (OpenAirDocs)
- Reported make and model: HILLER 12-C
- Registry model: [Hiller UH-12C](https://openairdocs.org/model/hiller-uh-12c) (registry code 4360116) (OpenAirDocs)
- Category: Helicopter
- Serial number: 850
- Airframe hours: 4500
- Engines: FRANKLIN 6V335 210 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Laren Zager
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, October 1, 1985, 100 hours before
- Departed: Z16, WASILLA, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 37; commercial; airplane ratings: single-engine land, multi-engine land; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 2,770 total, 34 in this make and model, 2,250 as pilot in command, 25 in the last 90 days, 15 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 10 knots, gusting 15
- Visibility: 100 statute miles
- Lowest ceiling: none
- Temperature: 48 °F, dew point 19 °F
- Altimeter: 29.00 inHg

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19860518018569A](https://openairdocs.org/incident/19860518018569A), May 18, 1986: Hiller UH12C, Palmer, AK, Substantial damage. Allowed rotor RPM to decay while hovering at low altitude looking for a landing area. Rotors struck shoreline rocks.

## Other investigations on N49983 (1)

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 NYC98LA006](https://openairdocs.org/ntsb/NYC98LA006), Oct 5, 1997: Hiller UH-12C (N49983), Bennington, VT, substantial damage. Probable cause: The failure of the cyclic control due to an improper modification by the pilot/owner.

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.

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