- Date
- June 3, 1984, 17:00 local (23:00 UTC)
- Place
- Alcova, WY
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N4997AAerospatiale SA316B
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19840603024739A
- Case key
- 16390
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
Plt stated that the approach and landing were normal until ground resonance started and the brakes did not hold. The plt attempted to pick back up to a hover to reposition, but lost directional control. The acft yawed and rolled to the left on nose. The plt stated that he 'would prefer to be able to fly the alouette iii more often for proficiency.' The alouette iii main rotor blades rotate in the opposite direction of American manufactured helicopters. The plt has logged 8784 hrs in American made helicopters and 20 hrs in the aerospatiale helicopters.
Aircraft
- Registration
- N4997A
- Reported as
- Aerospatiale SA316B
- Category
- Helicopter
- Serial number
- 1312
- Airframe hours
- 4
- Engine
- Turbomeca ARTOUSTE III, 690 horsepower, turbo shaft
- Damage
- Substantial damage
- Flight
- Part 135
- Operator
- Evergreen Helicopters Inc, doing business as [Ems]
- Registered owner
- Evergreen Helicopters
- Airworthiness certificate
- Standard, Normal
- Last inspection
- 100 hour · April 7, 1984 · 3,605 hours before
- Departed
- Casper, WY
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
- 39
- Certificate
- Commercial
- Airplane ratings
- Single-engine land
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Seat
- Right
- Flight hours
- 8,800 total · 20 in this make and model · 8,430 as pilot in command · 30 in the last 90 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 220° at 5 knots
- Visibility
- 10 statute miles
- Temperature
- 50 °F
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.