# NTSB SEA83LA083: Hiller 12-E, N62409, Near Nordm, ID, April 19, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 19, 1983, 07:00 local (15:00 UTC)
- Place: Near Nordm, ID
- Coordinates: 48.669555, -116.880729 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=48.6696&lon=-116.8807&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39682
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA83LA083
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39682/pdf
- Page: https://openairdocs.org/ntsb/SEA83LA083

## Sequence of events

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

- Roll over, landing - flare/touchdown
  - terrain condition - snow covered (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
  - terrain condition - icy (contributing factor)
  - run on landing - performed, pilot in command (cause)

## Analysis

THE AIRCRAFT BROKE THROUGH CRUSTED SNOW ON A COUNTY ROAD DURING LANDING AND ROLLED OVER. THE HELICOPTER WAS ON A BUSINESS FLIGHT AND THE PILOT DID NOT CLAIM ANY MECHANICAL DISCREPANCIES. THE WEATHER WAS VMC AND NONE OF THE 3 OCCUPANTS WERE INJURED. THE SNOW AT THE SCENE WAS ABOUT 4 FEET DEEP. DURING THE RUN ON LANDING THE SKIDS BROKE THROUGH THE CRUSTED TOP OF THE SNOW CAUSING THE HELICOPTER TO TIP FOWARD STRIKING THE MAIN ROTOR BLADES. THE AIRCRAFT YAWED TO THE RIGHT AND CAME TO REST ON ITS LEFT SIDE.

## Aircraft

- Registration: N62409 (not matched to a registry record)
- Reported make and model: HILLER 12-E
- Category: Helicopter
- Serial number: 2146
- Airframe hours: 6380
- Engines: ALLISON 250-C20B 305 horsepower turbo shaft
- Damage: Destroyed
- Flight: Business, Part 91
- Registered owner: Columbia Helicopters
- Airworthiness certificate: Standard, Normal
- Last inspection: Continuous airworthiness, April 14, 1983, 8 hours before
- Departed: NEAR NORDM, ID
- Flight plan: VFR
- Airport: 06

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 33; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 2,129 total, 308 in this make and model, 1,986 as pilot in command, 18 in the last 90 days, 50 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 20° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 48 °F, dew point 39 °F
- Altimeter: 29.00 inHg
- Observed at: SFF, 58 nm away

## 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 19830419015499A](https://openairdocs.org/incident/19830419015499A), Apr 19, 1983: Hiller OH23G, Nordman, ID, Destroyed. Made a run on landing on a snow-packed road. Skids broke through the hard packed snow. Tipped forward and broke up.

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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