# NTSB SEA91LA104: Hughes 269B, N9506F, Grand Ronde, OR, May 14, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 14, 1991, 13:30 local (20:30 UTC)
- Place: Grand Ronde, OR
- Coordinates: 45.06084, -123.649841 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.0608&lon=-123.6498&mi=10
- Phase of flight: [Standing](https://openairdocs.org/ntsb-phases/150) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report February 8, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 41428
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA91LA104
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41428/pdf
- Page: https://openairdocs.org/ntsb/SEA91LA104

## Probable cause

THE PILOT INADVERTENTLY INTERFERED WITH THE CONTROLS.

## Sequence of events

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

- On ground/water collision with object, standing - idling rotors
  - object - vehicle
  - control interference - inadvertent, pilot in command (cause)

## Analysis

AT THE END OF AN AERIAL APPLICATION FLIGHT, THE HELICOPTER WAS LANDED NEAR THE LOADING TRUCK.  THE PILOT REPORTED THAT AFTER LANDING WITH THE MAIN ROTOR BLADES STILL IDLING, HE LEANED FORWARD AND INADVERTENTLY MOVED THE CYCLIC.  THE MAIN ROTOR BLADES TIP PATH CHANGED AND STRUCK THE LOADING TRUCK.

## Aircraft

- Registration: [N9506F](https://openairdocs.org/deregistered/N9506F-2013-10-31), registration cancelled 2013-10-31, S/N 870335, built 1968 (OpenAirDocs)
- Reported make and model: Hughes 269B
- Registry model: [Hughes 269B](https://openairdocs.org/model/hughes-269b) (registry code 4470502) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Serial number: 87-0335
- Engines: LYCOMING HIO-360-B1A 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Precision Helicopters Inc.
- Registered owner: Precision Helicopters Inc.

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; airline transport, commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: helicopter, airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 7,500 total, 3,500 in this make and model, 7,250 as pilot in command, 250 in the last 90 days, 135 in the last 30 days, 9 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 45° at 5 knots
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: -0 °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 19910514015769A](https://openairdocs.org/incident/19910514015769A), May 14, 1991: Hughes 269B, Grand Ronde, OR, Substantial damage. On ground with rotors idling while chemical was loading. Leaned forward. Hit cyclic. Main rotors hit chemical truck

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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