- Date
- September 7, 1984, 08:50 local (14:50 UTC)
- Place
- Lyman, WY
- Injuries
- 5 minor
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N62338Aerospatiale SA315B
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19840907051549A
- Case key
- 16482
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
The plt stated that engine RPM began deteriorating during a climb to cruise flt. He returned to the landing site where the RPM decayed to flt idle, an autorotation was entered and a hard landing resulted. The engine ran for 1 hour in a test cell after the accident and no evidence of a malfunction was found. The fuel speed governor was removed, tested and found to function normally however during the removal of the fuel metering system part of an 'o' ring was found in a spring next to the fuel ports. The 'o' ring fragment could have blocked one of the fuel ports allowing the RPM to drop to flight idle.
Aircraft
- Registration
- N62338
- Reported as
- Aerospatiale SA315B
- Category
- Helicopter
- Serial number
- 2402
- Airframe hours
- 3,547
- Engine
- Turbomeca ARTOUSTE IIIB, 562 horsepower, turbo shaft
- Damage
- Substantial damage
- Flight
- Part 135
- Operator
- Evergreen Helicopters
- Airworthiness certificate
- Standard, Normal
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 35
- Certificate
- Commercial
- Airplane ratings
- Single-engine land
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Seat
- Right
- Flight hours
- 6,380 total · 2,950 in this make and model · 50 in the last 90 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 90° at 10 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- 2,000 ft overcast
- Temperature
- 46 °F, dew point 34 °F
- Altimeter
- 30.00 inHg
- Observed at
- EVW
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.