NTSB Identification: IAD05FA067.
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Accident occurred Saturday, May 21, 2005 in Brooklyn, NY
Probable Cause Approval Date: 08/29/2006
Aircraft: Cessna 172S, registration: N778LP
Injuries: 4 Fatal.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

After departing on an instructional flight, the instructor and three passengers were fatally injured when the airplane impacted terrain while maneuvering along a beach. Radar data showed the accident flight at 300 feet and at a ground speed of 60 knots just prior to the accident. This was correlated by witness statements that the airplane was observed to be at a low altitude prior to descending in a nose down attitude and impacting the ground. No preimpact malfunctions of the airplane were discovered and the flaps were in the 30-degree position. A review of the accident flight's weight and balance information revealed that the flight was flown in an overweight condition. According to the manufacturer's information manual for the airplane, at the maximum certificated takeoff weight, an altitude loss during a stall recovery could be as much as 230 feet. At the 30-degree wing flap position, published stall speeds for the airplane ranged from 40 knots at 0 degrees of bank to 57 knots at 60 degrees of bank.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The pilot's failure to maintain adequate airspeed, which resulted in an inadvertent stall and subsequent impact with terrain.

Full narrative available

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