- Date
- September 26, 1990, 10:30 local (14:30 UTC)
- Place
- Maryville, KY
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N96839Cessna 172
- Weather
- Visual (VMC) · Day
- Status
- Completed · report November 9, 1992
- Report
- Approved by Office Director
- FAA report
- 19900926046829A
- Case key
- 11615
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 NTSB’s determination of the probable cause, and any contributing factors.
The failure of a hydraulic brake line which resulted in a loss of fluid, and an inoperative brake system during landing roll.
Analysis
The pilot reported that during the prelfight, the left brake was 'weak.' The fluid level in the left brake hydraulic fluid reservoir was low and it was refilled. The brake operated satisfactorily. The pilot flew the aircraft to KY07 to further inspect the brake. During the landing, the pilot experienced a loss of pressure in the left brake. The pilot ground looped the aircraft by applying right brake. The aircraft went off the side of the runway, struck a fence and went into a ditch. Examination of the aircraft revealed the left brake line was worn through from chafing against a screw which secures the strut fairing.
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.
Aircraft
- Registration
- N96839
- Reported as
- Cessna 172
- Category
- Airplane
- Serial number
- 17276122
- Engine
- Lycoming O-320, 160 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Ferry · Part 91
- Registered owner
- Civil Air Patrol
- Airworthiness certificate
- Standard, Normal
- Last inspection
- 100 hour · August 26, 1990 · 32 hours before
- Departed
- LOU · Louisville, KY
- Airport
- runway 27, 1,500 × ft, grass/turf
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
- 67
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 3, Valid Medical--w/ waivers/lim
- Seat
- Left
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Calm
- Lowest ceiling
- None
- Temperature
- 81 °F
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.