- Date
- April 10, 1989, 10:30 local (14:30 UTC)
- Place
- Miamisburg, OH
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N9688BCessna 172RG
- Weather
- Visual (VMC) · Day
- Status
- Completed · report August 22, 1990
- Report
- Approved by Office Director
- FAA report
- 19890410007659A
- Case key
- 8011
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
Intermittant grounding of an electrical wire to the nose landing gear. The chafed wire resulted in the opening of the landing gear motor circuit breaker preventing full extension of the left main landing gear. A secondary failure of the throttle warning switch precluded a visual or aural warning of the unsafe gear position.
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
Following IFR flight PIC landed at uncontrolled field. On landing roll left main gear collapsed. Subsequent exam of acft revealed a chafed wire for nose gear micro switch grounded against airframe. Resulted in gear motor cb opening & stopping gear extension prior to full extension of left main gear. Also, internal failure of throttle warning switch did not provide an unsafe gear visual or aural warning.
Aircraft
- Registration
- N9688B
- Reported as
- Cessna 172RG
- Category
- Airplane
- Serial number
- 0969
- Airframe hours
- 1,765
- Engine
- Lycoming O-360-F1A6, 180 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Business · Part 91
- Operator
- Dunbar, Lee R.& Jeffrey T.
- Registered owner
- Dunbar, Lee R. & Jeffrey T.
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · January 6, 1989 · 20 hours before
- Departed
- TOL · Toledo, OH
- Destination
- MGY
- Flight plan
- IFR
- Airport
- MGY · Dayton General Arpt South, runway 2, 5,000 × 100 ft
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
- 50
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 3, Valid Medical--w/ waivers/lim
- Seat
- Left
- Flight hours
- 670 total · 235 in this make and model · 580 as pilot in command · 12 in the last 90 days · 8 in the last 30 days · 2 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 10° at 4 knots
- Visibility
- 7 statute miles
- Lowest ceiling
- None
- Temperature
- 28 °F, dew point 12 °F
- Altimeter
- 30.00 inHg
- Observed at
- DAY, 15 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.