# NTSB SEA85LA111: Beech H-35, N5425D, Owyhee Reserv., ID, May 13, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 13, 1985, 15:00 local (21:00 UTC)
- Place: Owyhee Reserv., ID
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40156
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA85LA111
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40156/pdf
- Page: https://openairdocs.org/ntsb/SEA85LA111

## Sequence of events

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

- Loss of engine power, cruise - normal
  - reason for occurrence undetermined (cause)
- Forced landing, descent - emergency
- On ground/water encounter with terrain/water, landing - flare/touchdown
  - terrain condition - rough/uneven (contributing factor)

## Analysis

THE FLT DEPARTED FROM BOISE, IDAHO, ON THE LEFT MAIN FUEL TANK. FIFTEEN MINUTES INTO THE FLT THE PLT SWITCHED TO THE LEFT AUXILIARY TANK. SEVERAL MINUTES LATER, THE ENGINE CEASED OPERATING DISPITE THE PLTS SWITCHING BACK TO THE LEFT MAIN FUEL TANK. AN ENGINE RESTART WAS NOT SUCCESSFUL. DUE TO VERY ROUGH TERRAIN, THE PLT MADE A FORCED LANDING ALONG A RIVER BANK WHERE SUBSTANTIAL DAMAGE WAS DONE. NO REASON FOR THE ENGINE FAILURE COULD BE DETERMINED.

## Aircraft

- Registration: N5425D (not matched to a registry record)
- Reported make and model: Beech H-35
- Category: Airplane
- Serial number: D4940
- Engines: CONTINENTAL IO-470-N 230 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Barney Hardin
- Airworthiness certificate: Standard, Normal
- Departed: BOI, BOISE, ID

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 286 total, 29 in this make and model, 250 as pilot in command, 8 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 75 °F
- Altimeter: 30.00 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 19850513022689A](https://openairdocs.org/incident/19850513022689A), May 13, 1985: Beech H35, Owyhee Reservoi, ID, Substantial damage. Unable to restart engine after it quit in flight. Landed in rough terrain. Engine malfunction undetermined.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.