# NTSB SEA91LA201: Piper PA-18-150, N7369D, Yakima, WA, June 26, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 26, 1991, 10:49 local (17:49 UTC)
- Place: Yakima, WA
- Coordinates: 46.540809, -120.759323 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.5408&lon=-120.7593&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report July 13, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 41507
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA91LA201
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41507/pdf
- Page: https://openairdocs.org/ntsb/SEA91LA201

## Probable cause

THE LOSS OF CONTROL BY THE PRIVATE PILOT AND FAILURE OF THE INSTRUCTOR PILOT TO PERFORM REMEDIAL ACTION.

## Analysis

THE PRIVATE PILOT WAS RECEIVING TRANSITION TRAINING IN TAIL WHEEL EQUIPPED ACFT AND LOST DIRECTIONAL CONTROL DURING LANDING GND ROLL.  THE INSTR PILOT DID NOT TAKE REMEDIAL ACTION BEFORE THE ACFT SWERVED OFF THE RWY AND GND LOOPED.

## 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 - inadvertent, dual student
  - remedial action - not performed, pilot in command(cfi) (cause)
- On ground/water encounter with terrain/water, landing - roll

## Aircraft

- Registration: [N7369D](https://openairdocs.org/deregistered/N7369D-2012-07-09), registration cancelled 2012-07-09, S/N 18-5734, built 1957 (OpenAirDocs)
- Reported make and model: PIPER PA-18-150
- Registry model: [Piper PA-18A 150](https://openairdocs.org/model/piper-pa-18a-150) (registry code 7101837) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 18-5734
- Engines: LYCOMING O-320 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: John P. Herke
- Registered owner: John P. Herke
- Airport: YKM, Yakima, runway 27, 7,603 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 45; flight instructor, airline transport; airplane ratings: single-engine sea, single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: rear; flight hours: 6,500 total, 300 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 150° at 3 knots
- Visibility: 40 statute miles
- Lowest ceiling: none
- Temperature: 70 °F, dew point 48 °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 19910626035879A](https://openairdocs.org/incident/19910626035879A), Jun 26, 1991: Piper PA18150, Yakima, WA, Substantial damage. Student lost directional control on landing the tail wheel PA18. CFI failed to recover swerve prior ground looping.

## Other investigations on N7369D (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 SEA78DYP39](https://openairdocs.org/ntsb/SEA78DYP39), Jul 11, 1978: Piper PA-18 (N7369D), Withrow, WA, substantial damage

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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