What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) On December 7, 2008 an American airlines aircraft flight 151 N381AN, a 767-232, s/n 25450 was struck by American airlines deicer truck 15582, while the aircraft was being deiced at O'Hare international airport. The deicer truck was backing up and came in contact with the right horizontal stabilizer. The aircraft was parked at the gate and had 177 passengers and 12 crew members onboard the aircraft at the time.
As the FAA filed it
(-23) ON DECEMBER 7, 2008 AN AMERICAN AIRLINES AIRCRAFT FLIGHT 151 N381AN, A 767-232, S/N 25450 WAS STRUCK BY AMERICAN AIRLINES DEICER TRUCK 15582, WHILE THE AIRCRAFT WAS BEING DEICED AT O'HARE INTERNATIONAL AIRPORT. THE DEICER TRUCK WAS BACKING UP AND CAME IN CONTACT WITH THE RIGHT HORIZONTAL STABILIZER. THE AIRCRAFT WAS PARKED AT THE GATE AND HAD 177 PASSENGERS AND 12 CREW MEMBERS ONBOARD THE AIRCRAFT AT THE TIME.