<< >> NASA ASRS Report 706530, August 2006

An EXTRA300 on runway with takeoff power applied the canopy opened and flipped over onto the wing. Canopy damaged extensively.

Attributes
ACN	706530
Time
Date	200608
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : btl.airport
State Reference	MI
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Experimental
Operating Under FAR Part	Part 91
Flight Phase	ground : takeoff roll
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : multi engine pilot : instrument pilot : cfi pilot : commercial
Experience	flight time last 90 days : 170 flight time total : 1708 flight time type : 15
ASRS Report	706530
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : rejected takeoff
Consequence	other other
Supplementary
Problem Areas	Environmental Factor Flight Crew Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

After lining up on the runway for departure (runway 23 btl) full power was added for takeoff. At this point the canopy of the aircraft opened and flipped over onto the wing destroying itself. Upon further investigation it appeared as though the canopy latch was not fully seating itself due to the warping during warm weather. Takeoff was aborted and no injuries occurred. Canopy will need to be replaced. Callback conversation with reporter revealed the following information: the reporter stated 2 factors contributed to the canopy latch failure. The sun had heated the canopy and expanded; and the latch spring was found weak thereby did not hold the latch in the lock position. The canopy was damaged beyond repair and will be replaced.

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Original NASA ASRS Text

Title: AN EXTRA300 ON RWY WITH TKOF PWR APPLIED THE CANOPY OPENED AND FLIPPED OVER ONTO THE WING. CANOPY DAMAGED EXTENSIVELY.

Narrative: AFTER LINING UP ON THE RWY FOR DEP (RWY 23 BTL) FULL PWR WAS ADDED FOR TKOF. AT THIS POINT THE CANOPY OF THE ACFT OPENED AND FLIPPED OVER ONTO THE WING DESTROYING ITSELF. UPON FURTHER INVESTIGATION IT APPEARED AS THOUGH THE CANOPY LATCH WAS NOT FULLY SEATING ITSELF DUE TO THE WARPING DURING WARM WEATHER. TKOF WAS ABORTED AND NO INJURIES OCCURRED. CANOPY WILL NEED TO BE REPLACED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED 2 FACTORS CONTRIBUTED TO THE CANOPY LATCH FAILURE. THE SUN HAD HEATED THE CANOPY AND EXPANDED; AND THE LATCH SPRING WAS FOUND WEAK THEREBY DID NOT HOLD THE LATCH IN THE LOCK POS. THE CANOPY WAS DAMAGED BEYOND REPAIR AND WILL BE REPLACED.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.