SANTA MONICA, Calif. (AP) -- The National Transportation Safety Board has released a summary of the plane crash that injured Harrison Ford last week in Southern California.

Officials work on the scene of a vintage airplane that crash-landed on the Penmar Golf Course in the Venice area of Los Angeles (AP Photo/Damian Dovarganes)

The report posted Tuesday on the agency's website does not, however, point to the cause of the engine failure that forced the World War II-era craft to crash-land on a golf course.

The actor's representatives said last week that his injuries weren't life-threatening and haven't released further information. Ford's son Ben has tweeted that his father is "battered" but OK.

The single-engine plane took off from Santa Monica Municipal Airport on Thursday afternoon. Soon after, Ford advised the control tower of the engine failure and requested an immediate return.

The plane began a left turn toward the airport but descended toward the golf course, striking a tree before hitting the ground about 800 feet from the runway.

 

(Copyright 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)