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NTSB Report
January 4, 1992 · Alvin D Campbell KR-2 · N651AC
San Marcos, TX
Overview
Report Status
Probable Cause
Event Type
Accident
Date
January 4, 1992
Injury Outcomes
2 injuries (2 fatalities)
Location
San Marcos, TX
Aircraft
Alvin D Campbell KR-2
Tail Number
N651AC
Operator
Alvin D Campbell
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
FTW92LA054
THE PILOT/BUILDER OF THE HOMEBUILT AIRCRAFT WAS ON A LOCAL FLIGHT TO DEMONSTRATE THE AIRCRAFT FLIGHT CHARACTERISTICS TO A PROSPECTIVE BUILDER. WHILE MANEUVERING, THE ONE PIECE PLEXIGLASS CANOPY SEPARATED FROM THE AIRFRAME DUE TO FAILURE OF THE HINGE SYSTEM, RESULTING IN AN INFLIGHT LOSS OF CONTROL. THE PILOT HAD MODIFIED THE CANOPY HINGE SYSTEM FROM THE STANDARD TWO HINGE SYSTEM, TO A FULL LENGTH PIANO WIRE HINGE SYSTEM. THE LOSS OF THE CANOPY IN SUCH A SHORT COUPLED FUSELAGE DISTURBED THE AIRFLOW TO THE POINT OF BLANKETING THE ELEVATORS.
NTSB Probable Cause
THE MODIFICATION OF THE CANOPY HINGE SYSTEM WHICH RESULTED IN THE LOSS OF AIRCRAFT CONTROL DUE TO AN INFLIGHT CANOPY SEPARATION.
Full Narrative
THE PILOT/BUILDER OF THE HOMEBUILT AIRCRAFT WAS ON A LOCAL FLIGHT TO DEMONSTRATE THE AIRCRAFT FLIGHT CHARACTERISTICS TO A PROSPECTIVE BUILDER. WHILE MANEUVERING, THE ONE PIECE PLEXIGLASS CANOPY SEPARATED FROM THE AIRFRAME DUE TO FAILURE OF THE HINGE SYSTEM, RESULTING IN AN INFLIGHT LOSS OF CONTROL. THE PILOT HAD MODIFIED THE CANOPY HINGE SYSTEM FROM THE STANDARD TWO HINGE SYSTEM, TO A FULL LENGTH PIANO WIRE HINGE SYSTEM. THE LOSS OF THE CANOPY IN SUCH A SHORT COUPLED FUSELAGE DISTURBED THE AIRFLOW TO THE POINT OF BLANKETING THE ELEVATORS.
Flight
Event TypeAccident
Event Time16:55 CST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireGrd
Aircraft ExplosionGrd
Aircraft
AircraftAlvin D Campbell KR-2
Tail NumberN651AC
Aircraft CategoryAir
DamageDestroyed
OperatorAlvin D Campbell
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsVolkswagen · 2180CC · Reciprocating · 85
Seats2
People & Injuries
Injury Summary2 injuries (2 fatalities)
Fatal2
Serious0
Minor0
Uninjured0
Total2
Crew 1Age 40 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind170° @ 3 kt
Visibility10 sm
CeilingOvercast 6000 ft
Temperature / Dew Point59 / 48
Altimeter29.00 inHg
Observation Time22:51
Weather SourceWFAC