Casualties unknown

1999-09-12: Lake LA-4 (N1137L) — Ann Arbor, MI

Ann Arbor, MI, US

On September 12, 1999, a Lake LA-4 (registration N1137L) was involved in an aviation accident near Ann Arbor, MI. Investigators recorded the probable cause as: The pilot's improper touchdown during a water landing. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards

A pilot practicing a touch and go landing on Bruin Lake reported the airplane decelerated abruptly and cartwheeled. Post-accident inspection found no mechanical issues.

Accident Details

The pilot was conducting a touch and go landing practice on Bruin Lake. According to the pilot's statement to police, upon touchdown the airplane decelerated sharply, as if the brakes were locked, and subsequently cartwheeled. The pilot did not report any mechanical malfunction prior to or during the event.

Investigation

Following the accident, an inspector examined the wreckage. The airplane was found broken into three major pieces. The inspection revealed no pre-impact anomalies. The landing gear was observed in the retracted position.

Witness Accounts

Police authorities relayed witness statements indicating that the pilot was attempting a landing on Bruin Lake when control of the aircraft was lost. One of the sponsons struck the water, causing the aircraft to flip over.

Conclusion

The investigation did not identify any mechanical or structural failures that could have contributed to the loss of control. The exact cause of the sudden deceleration and subsequent cartwheel remains unconfirmed in the official source.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X19713. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.