The Royal Canadian Air Force has been unable to find the culprit in the case of a flying life raft that crashed from one of its helicopters into a house in Miami.

An RCAF Griffon helicopter was flying toward the Opa-Locka airport during the afternoon of February 28 when the raft tumbled out of its open cargo doors, then through the roof of a house and into a woman’s bedroom nearly 500 ft. below.

A summary of the incident report conducted by the RCAF was published Monday. It said they were unable to determine how the life raft came loose.

On Tuesday, the RCAF provided the full report to iPolitics.

“The investigation found that the buckle on the passenger lap belt used to secure the life raft on the raft right seat had likely inadvertently been snagged by a crew member and/or their equipment, releasing the buckle. The helicopter was flying with its doors open, allowing the unsecured life raft to depart the aircraft,” said a Maj. Scott J.L. Spurr, a spokesperson for the Air Force said in an email.

The air force found that no one aboard the flight acted in any way that led to the incident.

At the time of the incident, The Miami Herald reported that the woman who occupied the house thought she was being bombed.

The helicopter was flown as part of the pilot and an engineer aboard’s training. The RCAF says one of the six people aboard the flight watched the raft fall. It then circled back to the house to mark where it landed before flying to the airport to land themselves. The woman sustained minor injuries. The raft left a gaping hole. The getaway life raft also caused other damages to the bedroom it fell into.

Local police helped the RCAF recover the raft, and as the report says, “there were no injuries to the crew or damage to the aircraft.”

The helicopter had flown with its cargo doors open due to the Florida heat. Unfortunately for crews flying aboard Griffons, they’ll no longer be allowed to do that because of this incident.

“CH-146 Griffon shall be operated in a “Cargo Doors Closed” configuration until further notice, except where doors are required to be opened to carry out duties,” says the incident report. It also recommends that griffon crews acquire straps that are less likely to release inadvertently.

“The fact that “we’ve always done it that way” and that nothing has ever happened does not mean that the system is free of safety risks,” says the report.

Here’s the full incident report:

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