- Date
- June 2, 1992, 20:03 local (Jun 3, 1992, 00:03 UTC)
- Place
- Delaware, OH
- Injuries
- 1 minor
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N1252ZBeech N35
- Weather
- Visual (VMC) · Day
- Status
- Completed · report August 26, 1993
- Report
- Approved by Office Director
- FAA report
- 19920602017969A
- Case key
- 37152
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
A loss of control in flight due to wake tubulence from a preceding helicopter. A factor related to the accident was the failure of the pilot to recoginize the hazards of his close proximity behind the landing helicopter.
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 bonanza was following an army AH-1S on landing approach. The helicopter crossed the threshold at approx 200 ft AGL and planned a touchdown approx 1500 ft from the approach end. While the helicopter was still about 250 ft from touchdown, the bonanza crossed the threshold and was observed to roll left and strike the ground with its left wing. The bonanza continued across a taxiway and came rest in an aircraft parking area. The helicopter weighed approximately 8400 pounds. When interviewed after the accident, the bonanza pilot said he was aware of helicopter wake turbulence and said he thought there was sufficient separation between his airplane and the preceding helicopter.
Aircraft
- Registration
- N1252Z
- Reported as
- Beech N35
- Category
- Airplane
- Serial number
- D-6715
- Airframe hours
- 2,029
- Engine
- Continental IO-470, 260 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Ronald L. Montgomery
- Registered owner
- Robert Gaunt & Associates, Inc
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · December 1, 1991 · 50 hours before
- Departed
- CMH · Columbus, OH
- Airport
- DLZ · Delaware Municipal, runway 1, 4,098 × 75 ft, asphalt
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
- 49
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 3, Valid Medical--w/ waivers/lim
- Seat
- Left
- Flight hours
- 1,618 total · 400 in this make and model · 1,320 as pilot in command · 23 in the last 90 days · 1 in the last 30 days
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 60° at 5 knots
- Visibility
- 5 statute miles
- Lowest ceiling
- None
- Temperature
- 72 °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 N1252Z · 2
Matched to the same aircraft by N-number and date.