- Date
- July 27, 1993, 18:30 local (23:30 UTC)
- Place
- Borup, MN
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Maneuvering
- Aircraft
- N6637QSchweizer G167B
- Weather
- Visual (VMC) · Day
- Status
- Completed · report August 17, 1994
- Report
- Approved by Office Director
- FAA report
- 19930727027329A
- Case key
- 9268
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
the loss of engine power due to a cracked cylinder head.
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 pilot reported the airplane lost engine power during an aerial application spray run. He made a forced landing on a soft field and the airplane nosed over. Examination of the engine revealed that the number seven cylinder head was cracked between the spark plugs.
Factual narrative
On July 27, 1993, about 1830 central daylight time, a Swizer G167B airplane, N6637Q, sustained substantial damage during a forced landing on a soft field near Borup, Minnesota. The solo commercial pilot was not injured. The aerial application flight operated under 14 CFR Part 137 without flight plan in visual meteorological conditions. The flight departed Ada, Minnesota, about 1845.
The pilot reported a total loss of engine power during an approach to a field to begin aerial spraying. He made a forced landing in the field and the airplane nosed over in the soft terrain.
An examination of the engine revealed the number seven cylinder head was cracked between the spark plugs.
Aircraft
- Registration
- N6637Q
- Reported as
- Schweizer G167B
- Category
- Airplane
- Serial number
- 167
- Airframe hours
- 8,385
- Engine
- P&W R1340, 600 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Aerial application · Part 137
- Operator
- Robert M. Johnson
- Registered owner
- Robert M. Johnson
- Airworthiness certificate
- Special, Restricted (Special)
- Last inspection
- Annual · May 10, 1993 · 213 hours before
- Departed
- Ada, MN
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
- 34
- Certificates
- Commercial, Private
- Airplane ratings
- Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Seat
- Front
- Flight hours
- 3,500 total · 3,000 in this make and model · 185 in the last 90 days
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 110° at 5 knots
- Visibility
- 15 statute miles
- Lowest ceiling
- None
- Temperature
- 90 °F, dew point 61 °F
- Altimeter
- 30.00 inHg
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.
Other investigations on N6637Q · 1
Matched to the same aircraft by N-number and date.