- Date
- September 1, 1986, 11:50 local (15:50 UTC)
- Place
- Coshocton, OH
- Injuries
- 3 uninjured
- Damage
- Substantial damage
- Phase of flight
- Initial climb
- Aircraft
- N549HEnstrom F-28C
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19860901043529A
- Case key
- 7175
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
The plt initiated a maximum power takeoff from a confined parking lot with 2 passengers on board. The area was boardered by obstructions & people. The plt rprtd that during lift-off, she increased power to 2900 RPM, lifted off to a 4' hover with 33' of manifold pressure, then began a max performance takeoff, 'pulling power and turning throttle' for extra RPM with slow forward speed, reaching 36' of manifold pressure. At aprx 15' AGL, the plt noted a decrease in RPM. She increased throttle application, then decreased the collective, but was unable to recover the loss of RPM. She made a left pedal turn to avoid obstructions & people. Subsequently, the helicopter touched down hard & was damaged. An exam of the eng did not reveal any defects. The flt manual warned that loss of rotor & eng RPM would follow when the eng was overboosted. At 36.5' of manifold pressure, the pop-off valve would have activated which would have resulted in a slight power loss.
Aircraft
- Registration
- N549H
- Reported as
- Enstrom F-28C
- Category
- Helicopter
- Serial number
- 345
- Airframe hours
- 1,132
- Engine
- Lycoming HIO-360-E1AD, 205 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Registered owner
- Trans Rotor, Inc.
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · April 11, 1986 · 68 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
- 33
- Certificate
- Commercial
- Airplane ratings
- Single-engine land
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Seat
- Right
- Flight hours
- 412 total · 388 in this make and model · 291 as pilot in command · 35 in the last 90 days · 7 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 150° at 9 knots
- Visibility
- 7 statute miles
- Lowest ceiling
- 1,700 ft overcast
- Temperature
- 70 °F, dew point 61 °F
- Altimeter
- 30.00 inHg
- Observed at
- ZZV, 20 nm away
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.