- Date
- November 28, 1986, 17:35 local (23:35 UTC)
- Place
- Watertown, WI
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N3691HMooney M20K
- Weather
- Visual (VMC) · Night/dark
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19861128062379A
- Case key
- 13703
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
Following an engine power loss due to fatigue of the #1 cylinder, the plt force landed the acft on a highway. The highway was the only available landing area, according to the plt. On landing rollout, the plt was forced to swerve the acft off the paved surface to avoid on coming vehicular traffic. The acft struck two traffic signs and subsequently went into a ditch along the side of the road. Although the sylinder appeared to have been properly manufactured, according to teledyne Continental metallurgical data the isolated location of the fatigue points and the absence of other possible causes of the cylinder failure indicate that a manufacturing defect existed.
Aircraft
- Registration
- N3691H
- Reported as
- Mooney M20K
- Category
- Airplane
- Serial number
- 250431
- Airframe hours
- 1,332
- Engine
- Continental TSIO-360-GB1, 210 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Registered owner
- David C Flemming
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · January 6, 1986 · 7 hours before
- Departed
- OSH · Oshkosh, WI
- Destination
- RFD · Rockford, IL
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 23
- Certificates
- Commercial, Flight instructor
- Airplane ratings
- Multi-engine land, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--no waivers/lim.
- Seat
- Right
- Flight hours
- 500 total · 6 in this make and model · 365 as pilot in command · 122 in the last 90 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Night/dark
- Wind
- 250° at 5 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 36 °F, dew point 30 °F
- Altimeter
- 30.00 inHg
- Observed at
- MSN, 25 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.