- Date
- April 26, 1985, 09:00 local (17:00 UTC)
- Place
- Myrtle Point, OR
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N99GMHiller 12E
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19850426015699A
- Case key
- 40146
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
During a CFR 137 flight a total loss of power occurred with an audible screech coming form the engine area. Autorotation was made and the acft was landed into a hevily treed area with steep terrain. During engine tear down a fractured impeller was found. Metallurgical analysis revealed that the fractured impeller was due to progression of a pre-existing fatigue crack in the impeller.
Aircraft
- Registration
- N99GM
- Reported as
- Hiller 12E
- Category
- Helicopter
- Serial number
- 1498
- Airframe hours
- 4,053
- Engine
- Allison 250-C20B, 305 horsepower, turbo shaft
- Damage
- Substantial damage
- Flight
- Aerial application · Part 137
- Registered owner
- Reforestation Services Inc.
- Airworthiness certificate
- Special, Restricted (Special)
- Last inspection
- 100 hour · September 28, 1984 · 57 hours before
- Destination
- NONE · Myrtle Point, OR
- Airport
- None
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 45
- Certificates
- Commercial, Flight instructor
- Airplane ratings
- Multi-engine land, Single-engine land, Single-engine sea
- Instrument ratings
- Airplane
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Seat
- Left
- Flight hours
- 12,402 total · 7,272 in this make and model · 12,250 as pilot in command · 96 in the last 90 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Calm
- Visibility
- 30 statute miles
- Lowest ceiling
- None
- 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.