On July 11, 1999, a Piper PA-22-150 (registration N7729D) operated by K W Aviation, Inc was involved in an aviation accident near Roy, UT. Investigators recorded the probable cause as: The pilot inadvertently allowing the aircraft to enter a stall during initial climb following takeoff. Factors were high density altitude and gross weight which exceeded the maximum. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During initial climb, the aircraft settled, climbed slowly, entered a right turn, and later rolled inverted into trees. Density altitude was 7,400 ft. Investigation found the aircraft was 136 pounds over its maximum certified gross weight.
Accident Sequence
After takeoff, during the initial climb, the aircraft was observed to settle and then climb slowly. It subsequently entered a right turn. The controller queried the pilot about having problems, to which the pilot responded that he would return and land but did not indicate any specific issues. The controller issued a clearance to land on the nearest runway. Shortly thereafter, the aircraft's wings were seen rocking, followed by the aircraft rolling inverted to the right and descending into trees.
Investigation Findings
The investigation revealed that at the time of the accident, the aircraft was 136 pounds over the maximum certified gross weight allowable. Additionally, the density altitude was reported as 7,400 feet.
Frequently asked questions
What happened in the 11 Jul 1999 Piper PA-22-150 accident near Roy, UT?
During initial climb, the aircraft settled, climbed slowly, entered a right turn, and later rolled inverted into trees. Density altitude was 7,400 ft. Investigation found the aircraft was 136 pounds over its maximum certified gross weight.
What aircraft was involved and where did it happen?
The accident on 11 Jul 1999 involved a Piper PA-22-150, registration N7729D, operated by K W Aviation, Inc, at Roy, UT.
What was the probable cause of the accident?
The pilot inadvertently allowing the aircraft to enter a stall during initial climb following takeoff. Factors were high density altitude and gross weight which exceeded the maximum.