- Date
- July 26, 1984, 07:45 local (13:45 UTC)
- Place
- Naturita, CO
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N4246Aerospatiale 316B
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19840726034899A
- Case key
- 16446
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
One of the axial compressor blades separated resulting in internal engine damage and loss of engine power. Examination of the blades showed evidence of corrosion beyond acceptable limits. The engine was not equipped with an air filter or particle separator. Helicopter damage was sustained during ground contact.
Aircraft
- Registration
- N4246
- Reported as
- Aerospatiale 316B
- Category
- Helicopter
- Serial number
- 1884
- Airframe hours
- 6,253
- Engine
- Turbomeca ARTOUSTE IIB, 562 horsepower, turbo shaft
- Damage
- Substantial damage
- Flight
- Other work use · Part 133
- Operator
- Alpine Helicopter Services Inc
- Registered owner
- Kjerstad Helicopters
- Airworthiness certificate
- Standard, Normal
- Last inspection
- 100 hour · July 25, 1984 · 3 hours before
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
- 38
- Certificate
- Commercial
- Airplane ratings
- Single-engine land
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Seat
- Right
- Flight hours
- 8,500 total · 150 in this make and model · 15 in the last 90 days · 6 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Calm
- Visibility
- 60 statute miles
- Lowest ceiling
- None
- Temperature
- 70 °F
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.
Other investigations on N4246 · 1
Matched to the same aircraft by N-number and date.