NTSB Identification: LAX06LA164.
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Accident occurred Sunday, May 07, 2006 in Show Low, AZ
Probable Cause Approval Date: 07/25/2007
Aircraft: Boeing Stearman E75, registration: N5263N
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 airplane sustained damage during an off airport forced landing following a loss of engine power in the takeoff initial climb. The pilot reported that the engine start and run-up were normal, and he flew off at 65 mph. The airplane climbed to 300 to 400 feet, and he pulled the propeller back for noise abatement. He noticed that the airspeed was low, so he lowered the nose, checked the trim, throttle, mixture, and made sure that the magneto switch was on both. He pushed the propeller control full forward, but the airplane was still not climbing. He maintained altitude, airspeed, and heading. He wanted to make sure that he cleared power lines and buildings at the departure end of the runway. He hoped to gain enough airspeed and lift to reach alfalfa fields, or make a slow turn back to the airport. The engine failed to generate enough power to maintain flight, and the situation became worse the longer he was airborne. With diminishing altitude and airspeed, he became concerned about a possible stall/spin. He slowly banked toward a field, and pushed the nose over to maintain airspeed. He landed in terrain about 300 yards from the airport. The landing gear separated and the lower wings sustained substantial damage. The FAA inspector who supervised the post accident wreckage examination reported that there was a patch around the air intake duct. After lifting the patch partially off, he noted that the duct's inner support wire had collapsed. The duct collapsed inward as well. He opined that this restricted the air flow, and enriched the fuel mixture, which resulted in the loss of power.

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

the collapse of the air intake duct resulted in a loss of engine power. A factor was the uneven terrain in the landing area.

Full narrative available

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