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NTSB Report
September 28, 2008 · North American Harvard MK · N9272C
Dayton, OH
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
September 28, 2008
Injury Outcomes
1 injury (1 minor injury), 1 uninjured
Location
Dayton, OH
Aircraft
North American Harvard MK
Tail Number
N9272C
Operator
Warbird Flyers
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
CHI08CA295
The pilot reported that when the tail wheel touched down during landing, he felt a "severe oscillation" which prevented him from maintaining directional control of the airplane. The airplane veered off the right side of the runway where it contacted a ditch collapsing the left main landing gear. The pilot reported he had always been able to control the airplane in the past with the tail wheel shimmy by using the brakes. Inspection of the airplane revealed the tail wheel clutch locking assembly cam was worn. In addition, the anti-shimmy friction spring was tightened down beyond limits.
NTSB Probable Cause
Improper maintenance on the tail wheel anti-shimmy mechanism and the pilot's decision to continue operating the airplane with a known shimmy in the tail wheel.
Full Narrative
The pilot reported that when the tail wheel touched down during landing, he felt a "severe oscillation" which prevented him from maintaining directional control of the airplane. The airplane veered off the right side of the runway where it contacted a ditch, collapsing the left main landing gear. The pilot reported that he had always been able to control the airplane in the past with the tail wheel shimmy by using the brakes. Inspection of the airplane revealed the tail wheel clutch locking assembly cam was worn. In addition, the anti-shimmy friction spring was tightened down beyond limits.
Flight
Event TypeAccident
Event Time15:30 EDT
Nearest AirportGreene County (0nm)
Runway25
Runway Length4500 ft
Runway Width75 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftNorth American Harvard MK
Tail NumberN9272C
Aircraft CategoryAir
DamageSubstantial
OperatorWarbird Flyers
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R1340 SERIES · Reciprocating · 600
Seats2
People & Injuries
Injury Summary1 injury (1 minor injury), 1 uninjured
Fatal0
Serious0
Minor1
Uninjured1
Total2
Crew 1Age 67 · Second Class · Minor
Conditions
ConditionsVMC
LightDaylight
Wind50° @ 7 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point46
Altimeter30.10 inHg
Observation Time19:56
Weather SourceWFAC