# NTSB SEA84LA054: Aerospatiale AS-341G, N633B, Alma, OR, February 17, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: February 17, 1984, 08:10 local (16:10 UTC)
- Place: Alma, OR
- Coordinates: 43.760601, -124.140411 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.7606&lon=-124.1404&mi=10
- 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): 39875
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA84LA054
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39875/pdf
- Page: https://openairdocs.org/ntsb/SEA84LA054

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, cruise - normal
  - fuel system,filter - loose (cause)
- Forced landing, cruise - normal
- Hard landing, landing - flare/touchdown
  - altitude - misjudged, pilot in command (cause)
- Other gear collapsed, landing - flare/touchdown
- Roll over, landing - flare/touchdown

## Analysis

THE PLT STATED HE LOST PARTIAL POWER ON A X-COUNTRY FLT, DURING CRUISE, AND INITIATED AN AUTOROTATION. AT ABOUT 200 TO 300 FT AGL HE REDUCED THE THROTTLE TO IDLE. DURING FLARE THE ROTOR RPM DECAYED AND THE ACFT LANDED HARD AND ROLLED OVER.THE PILOT STATED THAT THE FUEL FILTER HAD BACKED OFF.

## Aircraft

- Registration: [N633B](https://openairdocs.org/deregistered/N633B-2006-04-07), registration cancelled 2006-04-07, S/N 1040 (OpenAirDocs)
- Reported make and model: AEROSPATIALE AS-341G
- Registry model: [Aerospatiale SA341G GAZELLE](https://openairdocs.org/model/aerospatiale-sa341g-gazelle) (registry code 8680610) (OpenAirDocs)
- Category: Helicopter
- Serial number: 1040
- Airframe hours: 4905
- Engines: ASTAZOU 111A 494 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: Bohemia Lumber Company
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, October 3, 1983, 22 hours before
- Departed: EUG, EUGENE, OR
- Destination: OTH, NORTH BEND, OR
- Airport: None

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 50; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 5,116 total, 4,848 in this make and model, 68 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 230° at 5 knots
- Visibility: 5 statute miles
- Lowest ceiling: none
- Temperature: 30 °F, dew point 28 °F
- Altimeter: 30.00 inHg
- Observed at: EUG, 25 nm away

## 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 19840217004079A](https://openairdocs.org/incident/19840217004079A), Feb 17, 1984: Snias SA341G, Alma, OR, Substantial damage. Engine lost power. Allowed rotor RPM decay on landing. Hit hard and rolled. Reported fuel filter had backed off.

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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