On July 28, 1995, a North American AT-6F (registration N3173L) was involved in an aviation accident near Long Beach, CA. No fatalities were reported. Investigators recorded the probable cause as: the failure of the left main landing gear locking mechanism to fully seat in the 'down' position due to loose attachment bolts. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During a crosswind landing, the left main landing gear collapsed after touchdown, causing the aircraft to veer right and exit the runway, striking a sign. Investigation found the mechanical down lock broken and displaced due to improperly seated bolts.
Accident Sequence
As the pilot rolled out on final approach, he recognized a crosswind condition and initiated a crab into the wind in preparation for a crosswind landing. Following touchdown, the aircraft experienced a sudden veer to the right. The left main landing gear subsequently collapsed. The aircraft continued off the right side of the runway and collided with a sign mounted on a concrete base.
Pilot Control Inputs
During the landing, the pilot was applying right aileron and left rudder to compensate for the crosswind.
Landing Gear Examination
Post-accident inspection revealed that the mechanical down lock for the left main landing gear was broken and dislodged. The mechanical gear position indicator did not show that the left main gear was in the down and locked position. The bolts securing the down lock were found not properly seated, which allowed the down lock to shift from its correct mounting position.
Frequently asked questions
What happened in the 28 Jul 1995 North American AT-6F accident near Long Beach, CA?
During a crosswind landing, the left main landing gear collapsed after touchdown, causing the aircraft to veer right and exit the runway, striking a sign. Investigation found the mechanical down lock broken and displaced due to improperly seated bolts.
Were there any fatalities in the 28 Jul 1995 North American AT-6F accident?
No fatalities were recorded in this accident.
What aircraft was involved and where did it happen?
The accident on 28 Jul 1995 involved a North American AT-6F, registration N3173L, at Long Beach, CA.
What was the probable cause of the accident?
the failure of the left main landing gear locking mechanism to fully seat in the 'down' position due to loose attachment bolts.
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