# NTSB ANC90LA114: Piper PA-18-150, N91248, Dillingham, AK, July 8, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 8, 1990, 11:16 local (19:16 UTC)
- Place: Dillingham, AK
- Coordinates: 58.819084, -157.860519 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=58.8191&lon=-157.8605&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 15, 1992
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5402
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC90LA114
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5402/pdf
- Page: https://openairdocs.org/ntsb/ANC90LA114

## Probable cause

THE PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL DURING THE LANDING ROLL.

## 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
  - ground loop/swerve - inadvertent, pilot in command (cause)
- Main gear collapsed, landing - roll
- Dragged wing,rotor,pod,float or tail/skid, landing - roll
  - landing gear,main gear - overload (cause)

## Analysis

DURING THE LANDING ROLL, THE PILOT LOST CONTROL OF THE AIRPLANE AND GROUND LOOPED. THE LEFT MAIN LANDING GEAR COLLAPSED, CAUSING THE LEFT WING TO HIT THE RUNWAY. THE AIRPLANE WAS EQUIPPED WITH 30 INCH OVERSIZED TUNDRA TIRES.

## Aircraft

- Registration: [N91248](https://openairdocs.org/aircraft/N91248), registered now, S/N 18-8209014, built 1982 (OpenAirDocs)
- Reported make and model: PIPER PA-18-150
- Registry model: [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150) (registry code 7101828) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 18-8209014
- Engines: LYCOMING O-320-B2B 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Departed: NONE, EKUK BEACH, AK
- Airport: DLG, Dillingham, runway 19, 6,400 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; flight instructor, flight engineer, airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 8,300 total, 50 in this make and model, 6,600 as pilot in command, 228 in the last 90 days, 85 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 20 statute miles
- Lowest ceiling: 1,300 ft broken
- Temperature: 54 °F, dew point 48 °F
- Observed at: DLG

## 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 19900708024569A](https://openairdocs.org/incident/19900708024569A), Jul 8, 1990: Piper PA18150, Dillingham, AK, Substantial damage. Veered on landing roll over compensated opposite rudder and ground looped collapsing left gear. Wing tip damaged.

## Other investigations on N91248 (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 ANC95LA057](https://openairdocs.org/ntsb/ANC95LA057), May 22, 1995: Piper PA-18-160 (N91248), Hope, AK, substantial damage. Probable cause: THE PILOT'S FAILURE TO ADEQUATELY COMPENSATE FOR WIND CONDITIONS. FACTORS ASSOCIATED WITH THE ACCIDENT ARE THE TREES BORDERING THE RUNWAY, AND A DOWNDRAFT.

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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