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NTSB Report
February 6, 2008 · American Aviation AA-1A · N9483L
Grantsburg, WI
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
February 6, 2008
Injury Outcomes
No injuries (1 uninjured)
Location
Grantsburg, WI
Aircraft
American Aviation AA-1A
Tail Number
N9483L
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI08CA076
The pilot was performing touch-and-go landings on a turf runway covered with approximately 1-inch of wet snow and slush. The pilot had performed four touch-and-goes without incident. During the fifth landing roll, the pilot initially applied brake pressure to slow the airplane, but then released the brakes to allow the airplane to roll further down the runway. The pilot stated that the left brake seized and the airplane swerved to the left. The airplane was substantially damaged when it impacted a snowbank and nosed over. A post-accident inspection revealed that the left wheel would not rotate because of ice buildup between the rotor and the brake pad. The airplane was equipped with a castering nose gear and on-ground steering was accomplished solely by differential braking.
NTSB Probable Cause
The seizure of the left brake due to a buildup of ice between the rotor and brake pad. Contributing to the accident was the snow and slush covered runway, and the snowbank.
Full Narrative
The pilot was performing touch-and-go landings on a turf runway covered with approximately 1-inch of wet snow and slush. The pilot had performed four touch-and-goes without incident. During the fifth landing roll, the pilot initially applied brake pressure to slow the airplane, but then released the brakes to allow the airplane to roll further down the runway. The pilot stated that the left brake seized and the airplane swerved to the left. The airplane was substantially damaged when it impacted a snowbank and nosed over. A post-accident inspection revealed that the left wheel would not rotate because of ice buildup between the rotor and the brake pad. The airplane was equipped with a castering nose gear and on-ground steering was accomplished solely by differential braking.
Flight
Event TypeAccident
Event Time15:00 CST
Nearest AirportCircle T Airport (0nm)
Runway27
Runway Length2215 ft
Runway Width96 ft
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAmerican Aviation AA-1A
Tail NumberN9483L
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320 · Reciprocating · 160
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 47 · Third Class · None
Conditions
ConditionsVMC
LightDaylight
Wind360° @ 9 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point28 C / 10 C
Altimeter29.82 inHg
Observation Time20:56
Weather SourceWFAC