- Date
- August 17, 1982, 10:05 local (18:05 UTC)
- Place
- Near Sutton, AK
- Injuries
- 3 minor
- Damage
- Substantial damage
- Phase of flight
- Initial climb
- Aircraft
- N5698EEnstrom F-28F
- Weather
- Visual (VMC) · Day
- Status
- Completed · report August 17, 1983
- Report
- Approved by Office Director
- NTSB office
- Alaska Regional Office
- Case key
- 71940
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Analysis
The pilot had approached and landed on a bluff to discharge his two passengers. However, before discharging the passengers, he decided to takeoff and find a better landing area. When the helicopter was about 10 to 20 ft from the takeoff point, but approximately 200 ft AGL, there was a decrease in RPM. Initially, the pilot thought he was settling with power. He lowered the nose and collective, but was unable to regain the RPM, but he felt the helicopter yaw to the left. He felt mast-bumping and realized he must be cross-controlling with too much right pedal and left cyclic. He then entered an autorotation. The helicopter collided with trees on the side of the bluff and rolled to the bottom of the hill. An examination revealed that the NO-2 cylinder compression was low. The NO-2 intake valve had become tuliped and was leaking. There was evidence that it had been pounding. Also, there was indications of high engine RPM and temperature. The helicopter had been flown 38 hrs since the last inspection.
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.
Aircraft
- Registration
- N5698E
- Reported as
- Enstrom F-28F
- Category
- Helicopter
- Serial number
- 506
- Airframe hours
- 770
- Engine
- Lycoming HIO-360-F1AD, 225 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Business · Part 91
- Operator
- Kean & Associates
- Registered owner
- Robert T. Kean
- Departed
- Near Sutton, AK
- Destination
- Near Sutton, AK
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
- 25
- Certificate
- Private
- Medical
- Class 2, Valid Medical--w/ waivers/lim
- Flight hours
- 800 total · 600 in this make and model · 255 in the last 90 days
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Calm
- Visibility
- 20 statute miles
- Temperature
- 136 °F