Harrison Ford's plane crashed because a loose carburetor part led to engine failure, investigators from the National Transportation Safety Board (NTSB) announced Thursday.

The dispositive part of the NTSB report says that "the probable cause(s) of this accident as follows: A total loss of engine power during initial climb, when the carburetor main metering jet became unseated, which led to an extremely rich fuel-to-air ratio. Contributing to the accident was the lack of adequate carburetor maintenance instructions."

Ford was flying his 1942 Ryan Aeronautical ST3KR plane on Mar. 5, when he was forced to carry out a crash landing over at Penmar Golf Course in Venice, California.

A licensed and experienced pilot, the 73-year-old actor was able to carry out a near-perfect emergency landing. He survived the crash but with a broken pelvis, a broken ankle, a head laceration along with other injuries and had to be hospitalized.

Based on their post-accident investigation, NTSB found that the plane's carburetor, which controls the flow of oxygen and fuel into the engine, had somehow broken free of its casing and had rotated 90 degrees.

Having been so dislodged, it had allowed "an increased fuel flow through the main metering orifice, producing an extremely rich fuel-to-air ratio, which would have resulted in the loss of engine power."

Beyond that, the investigators found "no further mechanical failures or malfunctions that would have precluded normal operation."

The carburetor was rebuilt when the World War II vintage plane was restored 17 years ago, and NTSB investigators found no record of the carburetor jet assemblies having been actually inspected since then.

They also found no maintenance entries in the engine logbook regarding carburetor maintenance at all. There was moreover no record of maintenance personnel inspecting the carburetor jets during the previous 17 years.

"Had the carburetor maintenance instruction manual identified a means to ensure the security of the main metering jet," they said, "it is unlikely that the jet would have become unseated."

The NTSB said that Ford's injuries were likely made even more severe by an "improperly installed shoulder harness," which lacked reinforcement at or around the attachment bolt hole in the seatback.

"The lack of reinforcement allowed the attachment bolt, washers, and stop nut to be pulled upward and through the seatback structure during the impact sequence, which resulted in the pilot's loss of shoulder harness restraint," they said in the report.

With the report, the NTSB is hoping that the pilot community will take to heart the lessons learned from Harrison Ford's accident, namely, that "the security of the carburetor's main metering jet and the security of the shoulder harness are both critical aspects of aviation safety."

Ford, fully recovered, was already reported by Mirror flying his green 2013 Bell 407 helicopter in May with a co-pilot from Santa Monica to the Californian island of Catalina. The actor will again be seen on the big-screen this December in his Han Solo character in "Star Wars: Episode VII - The Force Awakens."