CUMBERLAND, Maine (AP) _ No one was injured when the helicopter landed hard in a field off Winn Road Tuesday afternoon. Officials say one of the chopper's two engines lost oil pressure as the crew was returning to Lewiston after transporting a patient to a hospital.
A pilot and two crew members were aboard.
LifeFlight officials say the crew landed the helicopter as a precaution and are well-trained for such emergencies. The aircraft wasn't damaged.
Mechanics are trying to determine why the engine lost oil pressure.
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