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20080715843679A

Accident · Substantial damage
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FAA accident report · Amtr AVENTURA II · Flushing, MI · July 15, 2008

FAA Aviation Safety Information Portal

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Date
July 15, 2008 · 10:31 local
Place
Flushing, MI
Airport
Dalton
Phase of flight
To Init Climb(1st Pwr Reduct)
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N621CD
NTSB investigation
NTSBCHI08LA191
Reported as
Amtr Aventuraii
Reported engine
ROTAX ROTAX912ULS
People aboard
1
Fatal injuries
1
Pilot’s flight hours
209 total41 in this make and model0 in the last 90 days
N621CDRegistration cancelled Sep 12, 2008 · Drochak Clifford AVENTURA IIS/N AA2A0130 · Built 2007Airframe modelDrochak Clifford AVENTURA IIEngine modelRotax 912ULS series4 cycle

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(-23) Approximately 1415Z aircraft was taking off from runway 27 at 3DA. Aircraft was headed west south west when an undetermined lack of power caused the aircraft to manuever into a nose up attitude. The aircraft began to stall and rolled over hard left causing the left wing spar to shear in flight. The wing attachment fittings were connected to the main engine mount as a structural support. The loss of structural integrity caused the engine to dismount and the torque pushed the engine forward away from its original plain of rotation thus causing two seperate prop strikes on the left side of the fuselage causing engine shutdown. Exactly four seconds after the engine shutdown the aircraft struck a tree causing damage to the left wing and the rest of aircraft. The left wing spar suffered an overstress at a point where the nr 2 rib attached at the spar. The connection point was a hole drilled through the spar with a through bolt with a washer . The hole was bored out due to the hardware not fitting the original manufactured hole. The bore caused a degredation in the structural integrity of the metal allowing the energy of the overstress to shear at that location.

As the FAA filed it

(-23) APPROXIMATELY 1415Z AIRCRAFT WAS TAKING OFF FROM RUNWAY 27 AT 3DA. AIRCRAFT WAS HEADED WEST SOUTH WEST WHEN AN UNDETERMINED LACK OF POWER CAUSED THE AIRCRAFT TO MANUEVER INTO A NOSE UP ATTITUDE. THE AIRCRAFT BEGAN TO STALL AND ROLLED OVER HARD LEFT CAUSING THE LEFT WING SPAR TO SHEAR IN FLIGHT. THE WING ATTACHMENT FITTINGS WERE CONNECTED TO THE MAIN ENGINE MOUNT AS A STRUCTURAL SUPPORT. THE LOSS OF STRUCTURAL INTEGRITY CAUSED THE ENGINE TO DISMOUNT AND THE TORQUE PUSHED THE ENGINE FORWARD AWAY FROM ITS ORIGINAL PLAIN OF ROTATION THUS CAUSING TWO SEPERATE PROP STRIKES ON THE LEFT SIDE OF THE FUSELAGE CAUSING ENGINE SHUTDOWN. EXACTLY FOUR SECONDS AFTER THE ENGINE SHUTDOWN THE AIRCRAFT STRUCK A TREE CAUSING DAMAGE TO THE LEFT WING AND THE REST OF AIRCRAFT. THE LEFT WING SPAR SUFFERED AN OVERSTRESS AT A POINT WHERE THE NR 2 RIB ATTACHED AT THE SPAR. THE CONNECTION POINT WAS A HOLE DRILLED THROUGH THE SPAR WITH A THROUGH BOLT WITH A WASHER . THE HOLE WAS BORED OUT DUE TO THE HARDWARE NOT FITTING THE ORIGINAL MANUFACTURED HOLE. THE BORE CAUSED A DEGREDATION IN THE STRUCTURAL INTEGRITY OF THE METAL ALLOWING THE ENERGY OF THE OVERSTRESS TO SHEAR AT THAT LOCATION.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

NTSB CHI08LA191Accident · 1 fatalLimited investigationFinal reportFlushing, MIA loss of engine power for undetermined reasons.Jul 15, 2008 · Substantial damage