# NTSB ANC86LA008: Cessna 150, N9115U, Rainbow Lake, AK, November 12, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: November 12, 1985, 15:45 local (19:45 UTC)
- Place: Rainbow Lake, AK
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (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): 4623
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC86LA008
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4623/pdf
- Page: https://openairdocs.org/ntsb/ANC86LA008

## Analysis

THE PLT REPORTED THAT AFTER THE ACFT TOUCHED DOWN ON A SNOW COVERED, FROZEN LAKE, HE WAS UNABLE TO HOLD THE NOSE GEAR UP, DUE TO THE DEPTH OF THE SNOW. WHEN THE NOSE CAME DOWN, THE NOSE GEAR BUCKLED UNDER & THE ACFT NOSED OVER.

## Sequence of events

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

- Nose over, landing
  - terrain condition - snow covered (cause)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)

## Aircraft

- Registration: [N9115U](https://openairdocs.org/aircraft/N9115U), registered now, S/N 15078066 (OpenAirDocs)
- Reported make and model: CESSNA 150
- Registry model: [Cessna 150M](https://openairdocs.org/model/cessna-150m) (registry code 2071830) (OpenAirDocs)
- Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 15078066
- Airframe hours: 4011
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Jesse Jasper
- Registered owner: Jesse Jasper
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, September 23, 1985, 52 hours before
- Departed: MRI, ANCHORAGE, AK
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 30; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 110 total, 80 in this make and model, 63 as pilot in command, 4 in the last 90 days, 2 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 5 °F, dew point 3 °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 19851112056779A](https://openairdocs.org/incident/19851112056779A), Nov 12, 1985: Cessna 150M, Rainbow Lake, AK, Substantial damage. Landed on a frozen lake in deep snow. Nose gear buckled and aircraft flipped over.

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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