- Date
- July 30, 1997, 16:00 local (21:00 UTC)
- Place
- Lone Rock, WI
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N75939Boeing B75N1
- Weather
- Visual (VMC) · Day
- Status
- Completed · report January 7, 1998
- Report
- Approved by Office Director
- FAA report
- 19970730020879A
- Case key
- 10658
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 locked right brake which resulted in the pilot's inability to maintain direction control of the airplane during the landing roll.
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 veered 'uncontrollably' to the right during the landing roll. The left wing contacted the ground and the airplane continued the turn until coming to rest on its nose 180 degrees opposite the direction of landing. Post accident inspection of the airplane revealed the crankcase breather tube was routed down the right main landing gear strut allowing oil residue to contaminate the brake system.
Factual narrative
On July 30, 1997, at 1600 central daylight time (cdt), a Boeing B75N1, N75939, operated by a commercial pilot collided with the terrain following a loss of control while landing at the Tri- County Regional Airport, Lone Rock, Wisconsin. The airplane was substantially damaged. The pilot was not injured. Visual meteorological conditions prevailed and it is unknown if a flight plan was filed. The airplane departed from Norman, Oklahoma, at 0630 cdt.
The pilot reported that during the landing roll the airplane veered "uncontrollably" to the right. During the turn the left wing contacted the ground. The airplane continued the turn until it came to rest on its nose, 180 degrees opposite the landing direction.
Post accident inspection of the airplane by a Federal Aviation Administration Airworthiness Inspector revealed the crankcase breather tube was routed down the right main landing gear strut thus allowing oil residue to contaminate the right brake.
Aircraft
- Registration
- N75939
- Reported as
- Boeing B75N1
- Category
- Airplane
- Serial number
- 75-1266
- Engine
- P&W 985-AN1, 450 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Registered owner
- Robert G. Ragozzino
- Airworthiness certificate
- Special, Experimental (Special)
- Departed
- OUN · Norman, OK
- Destination
- LNR
- Flight plan
- Unknown
- Airport
- LNR · Tri-County, runway 27, 4,020 × 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
- 38
- Certificate
- Commercial
- Airplane ratings
- Single-engine land, Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 3, Unknown
- Seat
- Rear
- Flight hours
- 6,900 total · 500 in this make and model · 6,800 as pilot in command · 50 in the last 90 days · 30 in the last 30 days · 6 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 110° at 5 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 81 °F, dew point 55 °F
- Altimeter
- 30.00 inHg
- Observed at
- LNR
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 N75939 · 1
Matched to the same aircraft by N-number and date.