What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Narrative: captain, first officer and flight engineer were given simulator and line checks. Mexicana 802 a Boeing 727 was attempting landing on runway 9R at o'Hare airport, Chicago, IL. During the landing roll the aircraft was unable to stop on the runway and continued to roll beyond the end of runway 9R about forty feet. There were no injuries and there was no aircraft damage.
As the FAA filed it
NARRATIVE: CAPTAIN, FIRST OFFICER AND FLIGHT ENGINEER WERE GIVEN SIMULATOR AND LINE CHECKS. MEXICANA 802 A BOEING 727 WAS ATTEMPTING LANDING ON RUNWAY 9R AT O'HARE AIRPORT, CHICAGO, IL. DURING THE LANDING ROLL THE AIRCRAFT WAS UNABLE TO STOP ON THE RUNWAY AND CONTINUED TO ROLL BEYOND THE END OF RUNWAY 9R ABOUT FORTY FEET. THERE WERE NO INJURIES AND THERE WAS NO AIRCRAFT DAMAGE.