Helio H-391B N4431U
26 August 1992 · Edmonds, Washington, United States · No injuries
Summary
On 26 August 1992 at about 03:40 local time, a Helio H-391B registered N4431U, operated by Brown, Christopher K., was involved in an accident near Edmonds, Washington, United States. One person was on board and nobody was injured. The aircraft was destroyed. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 03:40
- Classification
- Accident
- Location
- Edmonds, Washington, United States
- Coordinates
- 47.8007, -122.3702
- Aircraft
- Helio H-391B
- Registration
- N4431U
- Category
- Airplane
- Engines
- 1
- Operator
- Brown, Christopher K.
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Personal
- Phase of flight
- Not recorded
- Route
- Friday Harbor → Seattle
- Aircraft damage
- Destroyed
- Weather
- VMC
- Light
- Night/Dark
- NTSB number
- SEA92LA191
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 0 | 0 | 0 | 1 |
Probable cause
THE PARTIAL LOSS OF ENGINE POWER WHEN AN EXHAUST VALVE SEIZED IN THE OPEN POSITION AND THE WATER WHERE THE PILOT WAS FORCED TO LAND, WHICH RESULTED IN AN ACFT NOSE OVER ON TOUCHDOWN.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
THE PILOT INCREASED POWER TO INITIATE A CLIMB AND THE ENGINE PARTIALLY LOST POWER. HE DITCHED THE ACFT IN PUGET SOUND WHEN HE WAS UNABLE TO REACH AN AIRPORT OR THE SHORE FOR AN EMERGENCY LANDING. THE ACFT NOSED OVER ON TOUCHDOWN IN THE WATER. AN EXAM OF THE ENGINE AFTER THE ACCIDENT REVEALED THE NO 4 EXHAUST VALVE WAS SEIZED IN THE OPEN POSITION.
Quoted verbatim from the NTSB record.
Other Helio H-391B accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 13 Sep 1990 | Helio H-391B | Circle, Alaska, United States | Mastolier, Gary | No injuries | - |
| 20 Nov 1989 | Helio H-391B | Plainwell, Michigan, United States | - | No injuries | - |
| 6 Dec 1985 | Helio H-391B | Bozeman, Montana, United States | - | No injuries | - |
| 5 Jun 1983 | Helio H-391B | Croton, Michigan, United States | - | No injuries | - |
| 2 Jun 2001 | Helio H-391B | Anvik, Alaska, United States | Aurora Venturs Inc. | No injuries | - |
| 19 Nov 1983 | Helio H-391B | Hood River, Oregon, United States | - | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 11 Nov 1992 | Cessna 172M | Olympia, Washington, United States | Center O Flying Club | No injuries | - |
| 11 Nov 1992 | Cessna 210N | Spokane, Washington, United States | Soft Water Service Company | No injuries | - |
| 17 Nov 1992 | Cessna 172M | Vancouver, Washington, United States | Tabooma Flyers Inc. | Minor injuries | - |
| 3 May 1992 | Pilatus B-4 PC 11A | Wenatchee, Washington, United States | Butler, John | Fatal | 1 |
| 5 May 1992 | Rockwell S2R | St. John, Washington, United States | Larmie Aviation, Inc. | No injuries | - |
| 7 May 1992 | Fairchild 24W-40 | Toledo, Washington, United States | McKenney, Robert E. | No injuries | - |