# NTSB SEA86LA025: Piper PA-12, N3534M, Imnaha, OR, November 12, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: November 12, 1985, 15:00 local (23:00 UTC)
- Place: Imnaha, OR
- Coordinates: 45.460189, -116.750549 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.4602&lon=-116.7505&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40335
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA86LA025
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40335/pdf
- Page: https://openairdocs.org/ntsb/SEA86LA025

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - airport facilities,runway/landing area condition - snow covered (cause)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
- Nose over, landing - roll

## Analysis

PRIOR TO TAKEOFF THE PILOT TAXIED THROUGH A LOT OF SLUSH. A NOSE OVER OCCURRED WHILE ATTEMPTING TO LAND ON A SNOW COVERED CLEARING. THE NOSE OVER PROBABLY OCCURRED DUE TO VERY DEEP SNOW ON THE LANDING AREA AND FROZEN BRAKES.

## Aircraft

- Registration: [N3534M](https://openairdocs.org/deregistered/N3534M-2021-05-18), registration cancelled 2021-05-18, S/N 12-2383, built 1947 (OpenAirDocs)
- Reported make and model: PIPER PA-12
- Registry model: [Piper PA-12](https://openairdocs.org/model/piper-pa-12) (registry code 7101202) (OpenAirDocs)
- Registry engine: [Lycoming 0-235 series](https://openairdocs.org/engine/lycoming-0-235-series) (registry code 41505, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Serial number: 12-2383
- Airframe hours: 3650
- Engines: LYCOMING O-320-C 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Robert G. Tebo
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, September 27, 1985
- Departed: 0S6, VANCOUVER, WA
- Destination: IMNAHA, OR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 50; flight instructor, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 4,561 total, 217 in this make and model, 4,561 as pilot in command, 24 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 19 °F

## 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 19851112059579A](https://openairdocs.org/incident/19851112059579A), Nov 12, 1985: Piper PA12, Imnaha, OR, Substantial damage. Nosed over after landing in deep snow. Pilot stated brakes were frozen.

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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