- Date
- August 17, 1990, 09:15 local (17:15 UTC)
- Place
- Juneau, AK
- Injuries
- 6 uninjured
- Damage
- Substantial damage
- Phase of flight
- Initial climb
- Aircraft
- N26492Aerospatiale AS-350-B
- Weather
- Visual (VMC) · Day
- Status
- Completed · report December 30, 1992
- Report
- Approved by Office Director
- NTSB office
- Alaska Regional Office
- FAA report
- 19900817033939A
- Case key
- 5430
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
Failure of the free turbine intermediate pinion driven gear and subsequent disintegration of the free turbine assembly.
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.
Loss of engine power(total) - mech failure/malf
Turboshaft engine,free(power) turbine - failure,totalCause
Forced landing
Autorotation - performed
In flight collision with terrain/water
Analysis
Shortly ater takeoff, the helicopter experienced a complete engine failure. The pilot made an emergency landing onto an open lot. The engine failure was due to a failure and separation of the turbine intermediate pinion driven gear web unit.
Aircraft
- Registration
- N26492
- Reported as
- Aerospatiale AS-350-B
- Category
- Helicopter
- Serial number
- 1066
- Airframe hours
- 4,078
- Engine
- Turbomeca ARRIEL 1B, 650 horsepower, turbo shaft
- Damage
- Substantial damage
- Flight
- Part 135
- Registered owner
- Temsco Helicopter
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Continuous airworthiness · August 16, 1990 · 5 hours before
- Flight plan
- Company VFR
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 25
- Certificates
- Commercial, Flight instructor
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Seat
- Front
- Flight hours
- 910 total · 291 in this make and model · 856 as pilot in command · 297 in the last 90 days · 117 in the last 30 days · 5 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Calm
- Visibility
- 20 statute miles
- Lowest ceiling
- 4,000 ft broken
- Temperature
- 59 °F, dew point 54 °F
- Altimeter
- 29.00 inHg
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.