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Aviation Accident

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NTSB Identification: CEN17LA150
14 CFR Part 91: General Aviation
Accident occurred Sunday, April 09, 2017 in Pontiac, MI
Probable Cause Approval Date: 11/05/2018
Aircraft: PIPER PA 28R-201, registration: N36458
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.

While conducting touch-and-go landings and as the private pilot landed the airplane for the third time, the right main landing gear and nose landing gear collapsed, and the right wing was partially separated from the airplane.
Postaccident examination of the airplane revealed that maintenance personnel had improperly secured an unused instrument lamp socket during recent maintenance, which allowed an electrical short of the landing gear controls. The landing gear control circuit breaker tripped, which stopped the landing gear from fully extending while it was transitioning to the down position. It also rendered the landing gear indicators and warnings inoperative so the pilot was unaware the landing gear was not fully extended.


The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
  • Maintenance personnel’s improper securing of an unused instrument lamp socket during recent maintenance, which resulted in an electrical short of the landing gear controls and stopped the landing gear while it was transitioning to the down position and led to the landing gear collapse.