- Date
- July 1, 1992, 09:00 local (16:00 UTC)
- Place
- Mayer, AZ
- Injuries
- 4 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N9455GCessna U206E
- Weather
- Visual (VMC) · Day
- Status
- Completed · report August 26, 1993
- Report
- Approved by Office Director
- FAA report
- 19920701026429A
- Case key
- 27669
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 failure of the engine due to the slippage of the number 2 main bearing and the resultant oil starvation failure of the number 2 connecting rod. The number 2 main bearing slippage was caused by the failure of the pilot/owner to overhaul the engine in a timely fashion when internal wear patterns indicated that a potential bearing problem existed. A factor in the accident was the unsuitable nature of the terrain for a forced landing.
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 engine quit with a loud bang about 15 minutes into the cross country flight. The aircraft was over mountainous terrain and the pilot attempted to land in a small pasture. The aircraft encountered rough terrain during the landing roll out and nosed over. Investigation revealed that the number 2 main bearing had spun, closing off the internal oil passage in the crankshaft and journal. The engine sustained a resulting oil starvation failure of the number 2 and 3 connecting rods. Review of the maintenance records established that a maintenance facility had found a large amount of metal particles in the oil 40 hours prior to the accident. The maintenance facility warned the pilot about the excessive internal engine wear, recommending 'further inspection prior to flight.' No corrective action entries were noted in the logbook. The engine was found to have accrued 1,520 hours since overhaul. The manufacturer recommends a time between overhaul interval of 1,700 hours.
Aircraft
- Registration
- N9455G
- Reported as
- Cessna U206E
- Category
- Airplane
- Serial number
- U2061655
- Airframe hours
- 4,476
- Engine
- Continental IO-520-F, 300 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Combined Energies Corp, doing business as Young Builders
- Registered owner
- Combined Energies Corporation
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · January 1, 1992 · 43 hours before
- Departed
- DVT · Phoenix, AZ
- Destination
- ELY · Ely, NV
- Flight plan
- VFR
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
- 39
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 2, Valid Medical--w/ waivers/lim
- Seat
- Left
- Flight hours
- 931 total · 200 in this make and model · 888 as pilot in command · 19 in the last 90 days · 7 in the last 30 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 330° at 10 knots, gusting 15
- Visibility
- 30 statute miles
- Lowest ceiling
- None
- Temperature
- 84 °F
- Altimeter
- 29.00 inHg
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.