# NTSB DEN85LA190: Piper PA-25-235, N7614Z, Thistle, UT, July 15, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 15, 1985, 13:00 local (19:00 UTC)
- Place: Thistle, UT
- Location: 39.9913° N, 111.4982° W: Placed by OpenAirDocs: center of Thistle, UT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.9913&lon=-111.4982&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16725
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN85LA190
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16725/pdf
- Page: https://openairdocs.org/ntsb/DEN85LA190

## Sequence of events

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

- In flight collision with object, cruise - normal
  - terrain condition - wire,transmission
  - visual lookout - inadequate, pilot in command (cause)
- Loss of control - in flight, cruise - normal
  - airspeed - uncontrolled, pilot in command (cause)
  - altitude - uncontrolled, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled
  - terrain condition - mountainous/hilly

## Analysis

THE PLT HAD JUST COMPLETED AN AERIAL SPRAY MISSION AND WAS FLYING THROUGH A CANYON WHEN THE ACFT COLLIDED WITH PWR LINES. CONTROL OF THE ACFT WAS LOST AND IT CONTACTED THE TERRAIN.

## Aircraft

- Registration: [N7614Z](https://openairdocs.org/deregistered/N7614Z-2009-10-15), registration cancelled 2009-10-15, S/N 25-3723, built 1965 (OpenAirDocs)
- Reported make and model: PIPER PA-25-235
- Registry model: [Piper PA-25-235](https://openairdocs.org/model/piper-pa-25-235) (registry code 7102504) (OpenAirDocs)
- Registry engine: [Lycoming 0-540 series](https://openairdocs.org/engine/lycoming-0-540-series) (registry code 41532, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 25-3723
- Airframe hours: 5538
- Engines: LYCOMING O-540-B2B5 235 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Thomas Boyd Woodhouse
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, July 1, 1984
- Departed: 44U, SALINA, UT
- Destination: U77, SPANISH FORKS, UT

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; commercial; airplane ratings: single-engine land, multi-engine land; medical: class 2, invalid medical for flight; seat: center; flight hours: 13,500 total, 12,000 in this make and model, 300 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 84 °F, dew point -0 °F

## 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 19850715031619A](https://openairdocs.org/incident/19850715031619A), Jul 15, 1985: Piper PA25235, Thistle, UT, Substantial damage. Struck a powerline flying through a canyon on return trip after spraying was completed.

## Other investigations on N7614Z (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 DEN99LA118](https://openairdocs.org/ntsb/DEN99LA118), Jul 12, 1999: Piper PA-25-235 (N7614Z), Delta, UT, substantial damage. Probable cause: The pilot's delayed aborted takeoff. A factor was the high density altitude.

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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