NTSB Factual Report

On June 22, 2017, about 1325 Pacific daylight time, a Cessna 421B, N380AL, sustained substantial damage when the right main landing gear collapsed during the landing roll at Mc Clellan-Palomar Airport (CRQ), Carlsbad, California. The commercial pilot receiving instruction and flight instructor were not injured. The airplane was registered to Desert Media Holdings, Borrego Springs, California, and operated by a private individual under the provisions of 14 Code of Federal Regulations Part 91 as an instructional flight. Visual meteorological conditions prevailed and no flight plan was filed for the cross-country flight that originated from the French Valley Airport (F70), Temecula, California, about 40 minutes prior to the accident. The intended destination was Borrego Springs, California.

The pilot reported that the accident flight was the first flight following extensive maintenance and they elected to depart and circle F70 for about 20 minutes to verify everything was working properly prior to flying to various airports around the area. The pilot said they flew to Ramona, California, and conducted an uneventful landing prior to flying to CRQ. The pilot stated that following a normal landing on runway 24, he let the airplane roll out the length of the runway while using minimal braking. As the airplane slowed to about 10 knots, the pilot noticed a "severe wobble as something may have been out of balance." Subsequently, the right main landing gear collapsed and the right wing and elevator struck the ground.

Examination of the airplane by a Federal Aviation Administration inspector revealed that the right wing sustained structural damage. The airplane was recovered to a secure location for further examination.