# NTSB ANC88LA114: Piper PA-18-150, N2460A, Yenta Glacier, AK, August 18, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 17, 1988, 20:30 local (Aug 18, 1988, 04:30 UTC)
- Place: Yenta Glacier, AK
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report June 9, 1989
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5055
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC88LA114
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5055/pdf
- Page: https://openairdocs.org/ntsb/ANC88LA114

## Sequence of events

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

- Loss of control - on ground/water, takeoff - roll/run
  - landing gear,normal brake system - frozen (cause)
  - aircraft preflight - improper, pilot in command (cause)
  - directional control - not possible (cause)
- Nose over, takeoff - roll/run

## Analysis

DURING THE TAKEOFF ROLL ON THE GRAVEL BAR, THE PILOT LOST DIRECTIONAL CONTROL OF THE AIRPLANE CAUSING THE PLANE TO NOSE OVER ON ITS BACK. EXAMINATION OF THE LEFT BRAKE REVEALED THAT THE BRAKE WAS FROZEN WITH MUD.

## Aircraft

- Registration: N2460A (not matched to a registry record)
- Reported make and model: PIPER PA-18-150
- Category: Airplane
- Serial number: 181945
- Airframe hours: 3473
- Engines: LYCOMING O-320-A2B 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Wayne Kubat
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, July 23, 1988, 29 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 34; private; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 1,311 total, 1,250 in this make and model, 1,250 as pilot in command, 70 in the last 90 days, 30 in the last 30 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 40 statute miles
- Lowest ceiling: 8,000 ft broken
- Temperature: 61 °F, dew point 52 °F
- Altimeter: 30.00 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 19880817048419A](https://openairdocs.org/incident/19880817048419A), Aug 17, 1988: Piper PA18135, Yentna Glacier, AK, Substantial damage. Brake locked on takeoff roll from gravel bar causing aircraft to nose over. Found mud snow and ice in brake.

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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