NTSB Identification: LAX08LA080.
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Nonscheduled 14 CFR
Accident occurred Thursday, March 20, 2008 in Portland, OR
Probable Cause Approval Date: 04/30/2008
Aircraft: Piper PA-31-350, registration: N4098A
Injuries: 1 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 pilot reported that when he was preparing to land at his destination, he found that the right main landing gear failed to extend. The pilot diverted back to the originating airport. Maintenance personnel discussed the problem with the pilot and various remedial actions were tried without success. The pilot declared an emergency, and landed with the right main gear retracted. During the recovery efforts, the airplane was jacked up in order to extend the right main landing gear, which locked in place. The airplane was then towed to a hangar. Examination revealed that the upper pivot bolt had not been installed through the pivot hole in the upper end of the actuating rod during recent maintenance. The mechanic who did the repair and the inspector who signed off the repair did not detect the discrepancy.

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

The failure of company maintenance personnel to install the upper pivot bolt through the pivot hole in the upper end of the landing gear actuating rod, and the company maintenance inspector's inadequate inspection of the work performed.

Full narrative available

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