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NTSB Report
February 15, 1992 · Avions Mudry CAP-10B · N64ND
Santa Paula, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
February 15, 1992
Injury Outcomes
1 injury (1 minor injury)
Location
Santa Paula, CA
Aircraft
Avions Mudry CAP-10B
Tail Number
N64ND
Operator
Peter Poland
Injuries
Minor
Aircraft Damage
Destroyed
NTSB Number
LAX92LA118
IN HIS WRITTEN STATEMENT, THE PILOT REPORTED THAT HE STARTED A LOOP AT ABOUT 4,500 FEET ABOVE MEAN SEA LEVEL. HE ENTERED THE MANEUVER AT 160 MPH AND 'PULLED 5 TO 5 1/2 G'S (EST).' HE STATED THAT WHEN THE AIRCRAFT WAS IN A 45 DEGREE NOSE UP ATTITUDE, HE HEARD A 'LOUD BANG.' HE REMOVED HIS SEAT BELTS (2), EXITED THE AIRPLANE, AND PARACHUTED TO SAFETY. AN EXAMINATION OF THE ACCIDENT SITE AND AIRPLANE REVEALED THE LEFT WING FAILED AND DEPARTED THE AIRCRAFT DURING THE LOOP MANEUVER. A LABORATORY EXAMINATION OF THE FAILED WOODEN WING REVEALED, IN PART '...THAT FAILURE OCCURRED PROBABLY BECAUSE OF OVERLOADING OF THE SPAR.' THE LABORATORY REPORT FURTHER STATED 'THE VERY BRASH FAILURE COMPLETELY THROUGH THE CROSS-SECTIONAL AREA OF THE COMPRESSION LAMINATE SUGGESTS PRE-EXISTING COMPRESSION FAILURES IN THE LAMINATE BEFORE CATASTROPHIC FAILURE THROUGH THE CRITICAL LOADING AREA.'
NTSB Probable Cause
THE FAILURE OF THE AIRPLANES'S LEFT WING SPAR DUE TO STRESS OVERLOADING CAUSED BY PRE-EXISTING COMPRESSION FAILURES IN THE LAMINATE.
Full Narrative
IN HIS WRITTEN STATEMENT, THE PILOT REPORTED THAT HE STARTED A LOOP AT ABOUT 4,500 FEET ABOVE MEAN SEA LEVEL. HE ENTERED THE MANEUVER AT 160 MPH AND 'PULLED 5 TO 5 1/2 G'S (EST).' HE STATED THAT WHEN THE AIRCRAFT WAS IN A 45 DEGREE NOSE UP ATTITUDE, HE HEARD A 'LOUD BANG.' HE REMOVED HIS SEAT BELTS (2), EXITED THE AIRPLANE, AND PARACHUTED TO SAFETY. AN EXAMINATION OF THE ACCIDENT SITE AND AIRPLANE REVEALED THE LEFT WING FAILED AND DEPARTED THE AIRCRAFT DURING THE LOOP MANEUVER. A LABORATORY EXAMINATION OF THE FAILED WOODEN WING REVEALED, IN PART '...THAT FAILURE OCCURRED PROBABLY BECAUSE OF OVERLOADING OF THE SPAR.' THE LABORATORY REPORT FURTHER STATED 'THE VERY BRASH FAILURE COMPLETELY THROUGH THE CROSS-SECTIONAL AREA OF THE COMPRESSION LAMINATE SUGGESTS PRE-EXISTING COMPRESSION FAILURES IN THE LAMINATE BEFORE CATASTROPHIC FAILURE THROUGH THE CRITICAL LOADING AREA.'
Flight
Event TypeAccident
Event Time12:00 PST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireGrd
Aircraft ExplosionGrd
Aircraft
AircraftAvions Mudry CAP-10B
Tail NumberN64ND
Aircraft CategoryAir
DamageDestroyed
OperatorPeter Poland
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · AEIO-360-B2F · Reciprocating · 180
Seats2
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 51 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind270° @ 10 kt
Visibility50 sm
CeilingNone
Temperature / Dew Point57 / 0 C
Altimeter0
Weather SourcePILO