A crew member mentioned a problem with the left engine seconds before that pilot's Beechcraft King Air 350i crashed at the Dallas-area Addison Airport, according to the NTSB's preliminary report on the June 30 accident that claimed the lives of eight passengers and two crew members.
The aircraft (N534FF), registered to EE Operations, was slated for a Part 91 trip to Albert Whitted Airport in St. Petersburg, Florida, and according to the report, the crew and passengers arrived about an hour and a half before the flight. The turboprop twin’s tanks were topped off and the luggage was loaded in the aft baggage compartment. A witness to the accident stated that the airplane “seemed more quiet than normal” on takeoff, and sounded like it did not have enough power to take off. After it lifted off, the King Air drifted to the left and then rolled left, with one security camera catching it completely inverted before it crashed into a hangar. While some fragments were found inside and on the roof of the hangar, the main wreckage came to rest outside the hangar against a brick wall.
The aircraft was equipped with an L3 FA2100 cockpit voice recorder, which was recovered with two hours of useable audio, including the accident flight. A crew member mentioned the engine problem eight seconds before the end of the recording. Three aural bank angle alerts were heard five seconds later.