What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) The aircraft was being ferried to (ord) for repairs to the stab trim system. The nose wheel steering system was deferred per the MEL. Therefore, to turn the aircraft onto the runway, a tug was needed to make the 180 degree turn, to get the aircraft to the correct runway heading. This caused the tow vehicle to "jack knife" allowing the tug to slide under the aircraft belly. A galley drain mast was damaged and minor scrapes and scratches were noted on the belly skin.
As the FAA filed it
(-23) THE AIRCRAFT WAS BEING FERRIED TO (ORD) FOR REPAIRS TO THE STAB TRIM SYSTEM. THE NOSE WHEEL STEERING SYSTEM WAS DEFERRED PER THE MEL. THEREFORE, TO TURN THE AIRCRAFT ONTO THE RUNWAY, A TUG WAS NEEDED TO MAKE THE 180 DEGREE TURN, TO GET THE AIRCRAFT TO THE CORRECT RUNWAY HEADING. THIS CAUSED THE TOW VEHICLE TO "JACK KNIFE" ALLOWING THE TUG TO SLIDE UNDER THE AIRCRAFT BELLY. A GALLEY DRAIN MAST WAS DAMAGED AND MINOR SCRAPES AND SCRATCHES WERE NOTED ON THE BELLY SKIN.