# NTSB DEN85LA101: Piper PA 18-150, N2582S, Grand Forks, ND, March 21, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 21, 1985, 10:00 local (16:00 UTC)
- Place: Grand Forks, ND
- Coordinates: 47.920074, -97.070648 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.9201&lon=-97.0706&mi=10
- 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 case key (mKey): 16653
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN85LA101
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16653/pdf
- Page: https://openairdocs.org/ntsb/DEN85LA101

## 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
  - directional control - not maintained, dual student (cause)
  - ground loop/swerve - uncontrolled, dual student (cause)
  - supervision - inadequate, pilot in command(cfi) (cause)
- Dragged wing,rotor,pod,float or tail/skid, landing - roll

## Analysis

ON MARCH 21, 1985, A PIPER PA 18 GROUND LOOPED ON LANDING ROLLOUT AT GRAN FORKS, ND. THE INSTRUCTOR STATED THE AIRCRAFT ACCIDENT OCCURRED WHEN HE WAS CHECKING OUT ANOTHER FLIGHT INSTRUCTOR IN THE TAILWHEEL AIRPLANE. DURING THE LANDING ROLL OUT THE AIRPLANE 'GOTAWAY' FROM THE STUDENT INSTRUCTOR IN THE FRONT SEAT. THE AIRPLANE GROUNDLOOPED TO THE RIGHT AND BENT THE LEFT WING SPAR.

## Aircraft

- Registration: [N2582S](https://openairdocs.org/aircraft/N2582S), registered now, S/N 18-7909161, built 1979 (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: 18-7909161
- Airframe hours: 1561
- Engines: LYCOMING O-320-A2B 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: University Of North Dakota
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, March 15, 1985, 17 hours before
- Airport: GFK, Grand Forks, runway 17, 3,400 × 100 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 25; airline transport; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: rear; flight hours: 3,291 total, 20 in this make and model, 3,015 as pilot in command, 24 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 320° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 52 °F, dew point 39 °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 19850321016939A](https://openairdocs.org/incident/19850321016939A), Mar 21, 1985: Piper PA18150, Grand Forks, ND, Minor damage. Aircraft ground looped on rollout. CFI was giving tail wheel instruction to other CFI.

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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