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NTSB Report
March 11, 2011 · Aeronca 7EC · N2349E
Big Bear City, CA
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
March 11, 2011
Injury Outcomes
No injuries (1 uninjured)
Location
Big Bear City, CA
Aircraft
Aeronca 7EC
Tail Number
N2349E
Injuries
None
Aircraft Damage
Substantial
NTSB Number
WPR11CA157
The pilot reported that prior to takeoff, he removed the left main landing gear wheel because its tire had a slow air leak. The pilot, who held a Federal Aviation Administration issued airframe and powerplant mechanic certificate, replaced the tube and reinstalled the wheel. He indicated that when performing this maintenance, he did not properly secure the wheel’s retaining nut with a cotter pin. During the takeoff roll, the attachment nut unscrewed and the wheel separated from the axle and airplane. The pilot flew around the area for about 30 minutes in an effort to burn off fuel. Upon landing, the airplane veered left off the runway and nosed over, breaking wing ribs and a lift strut.
NTSB Probable Cause
The pilot's improper maintenance, which resulted in a wheel separating from the airplane during takeoff, and the airplane's subsequent nose over during the landing rollout.
Full Narrative
The pilot reported that prior to takeoff, he removed the left main landing gear wheel because its tire had a slow air leak. The pilot, who holds an airframe and powerplant mechanic certificate, reported that after replacing the tube he reinstalled the wheel on his airplane. He indicated that when performing this maintenance, he did not properly secure the wheel’s retaining nut with a cotter pin. During his subsequent takeoff roll, the attachment nut unscrewed, and the wheel separated from the axle and airplane. The pilot flew around the area for about 30 minutes burning off fuel. Upon landing, the airplane veered left off the runway and nosed over, breaking wing ribs and a lift strut.
Flight
Event TypeAccident
Event Time18:00 PST
Nearest AirportBig Bear City (0nm)
Runway08
Runway Length5850 ft
Runway Width75 ft
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAeronca 7EC
Tail NumberN2349E
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsCont Motor · C90-12F · Reciprocating · 90
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 67 · Third Class · None
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility10 sm
CeilingNone
Temperature / Dew Point39 C / 0 C
Altimeter30.14 inHg
Weather SourcePILO