What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
17:18 - Ground crew requests attention to icy ramp areas around concourse a.
17:50 - Spirit flight NK251 cle-atl pushes back from gate A6. Ground crew reports slow speed push with intention to position the aircraft with nose facing gate A8. As the flight crew started the number 1 (left) engine, the aircraft and tug lost traction and began to slide on the icy ramp. As the aircraft came to a stop, the tug was swung beyond the 95 degree nose steering limit. The aft right corner of the tug impacted the outboard portion of the number 1 engine cowling as it came to a stop. Damage to the leading edge of the cowling was noted at the 3-O'CLOCK position, approximately 3 inches by 8 inches.
17:51 - Incident was reported to cle ATCT by the flight crew. No injuries.
18:30 - Concourse a ramp areas inspected, mu value average 27 (borderline "nil" braking action).
19:01 - Sand and chemicals applied to concourse a ramp areas, mu values reported increasing.
As the FAA filed it
17:18 - GROUND CREW REQUESTS ATTENTION TO ICY RAMP AREAS AROUND CONCOURSE A.
17:50 - SPIRIT FLIGHT NK251 CLE-ATL PUSHES BACK FROM GATE A6. GROUND CREW REPORTS SLOW SPEED PUSH WITH INTENTION TO POSITION THE AIRCRAFT WITH NOSE FACING GATE A8. AS THE FLIGHT CREW STARTED THE NUMBER 1 (LEFT) ENGINE, THE AIRCRAFT AND TUG LOST TRACTION AND BEGAN TO SLIDE ON THE ICY RAMP. AS THE AIRCRAFT CAME TO A STOP, THE TUG WAS SWUNG BEYOND THE 95 DEGREE NOSE STEERING LIMIT. THE AFT RIGHT CORNER OF THE TUG IMPACTED THE OUTBOARD PORTION OF THE NUMBER 1 ENGINE COWLING AS IT CAME TO A STOP. DAMAGE TO THE LEADING EDGE OF THE COWLING WAS NOTED AT THE 3-O'CLOCK POSITION, APPROXIMATELY 3 INCHES BY 8 INCHES.
17:51 - INCIDENT WAS REPORTED TO CLE ATCT BY THE FLIGHT CREW. NO INJURIES.
18:30 - CONCOURSE A RAMP AREAS INSPECTED, MU VALUE AVERAGE 27 (BORDERLINE "NIL" BRAKING ACTION).
19:01 - SAND AND CHEMICALS APPLIED TO CONCOURSE A RAMP AREAS, MU VALUES REPORTED INCREASING.