NTSB Identification: CHI97LA176.
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Accident occurred Saturday, June 21, 1997 in LINO LAKES, MN
Probable Cause Approval Date: 12/15/1997
Aircraft: Maule M5C, registration: N5643Y
Injuries: 2 Uninjured.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
The owner/pilot had just purchased the airplane, and was seeking instruction in the aircraft to fulfill his insurance requirements. He referenced the Pilot's Operating Handbook and noted to the CFI that the configuration for takeoffs in water was with 35 degrees of flaps. The CFI responded that only 15 degrees of flaps were needed. The owner reported, 'during the takeoff run it seemed to me that we had difficulty getting on a good step situation.' The owner further said, 'at the point where an aborted takeoff should have been executed, I saw him [CFI] reach for what I was certain would be the power and an aborted takeoff. Instead, he [CFI] reached for the flap handle and put the flaps at 35 degrees and horsed back on the controls so that the nose did come up, but there was no way we could avoid hitting the shore which was covered with bull bushes.' The airplane contacted the high grasses, nosed over, and came to rest inverted 150 feet from the shoreline. The CFI reported, 'I was a little too late in aborting the takeoff.' The seaplane base operator reported that the CFI elected to use a shortened portion of the lake for the takeoff run, and could have extended the takeoff run by a half a mile by changing the takeoff heading by ten degrees.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: the flight instructor's inadequate preflight planning/preparation, his the improper lowering of flaps for takeoff, his failure to use a longer available area for takeoff, and his failure to abort the takeoff before there was an insufficient amount of area remaining to abort. The encounter with high vegetation was a related factor. Full narrative available
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