What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
1. On March 13, 2012, delta air lines maintenance taxied a Boeing 737-732 aircraft, N309DE to the east end of taxiway echo, at approx 05:00 EST. To perform a dual engine run up for vibe survey due to a fan lube performed earlier. 2. After a two minute slow acceleration to power and stabilized at power for a few seconds the maintenance crew began deceleration when the aircraft broke free and started to slide with the brakes set. 3. Throttles were retarded to idle and manual braking was applied with no effect. 4. Aircraft came to rest on the embankment beyond the east end of echo taxiway. 5. The aircraft was recovered by delta air lines go-team to a safe position.6. The cockpit voice recorder and flight data recorder have been quarantined. 7. The incident is currently under investigation by the delta cmo.
As the FAA filed it
1. ON MARCH 13, 2012, DELTA AIR LINES MAINTENANCE TAXIED A BOEING 737-732 AIRCRAFT, N309DE TO THE EAST END OF TAXIWAY ECHO, AT APPROX 05:00 EST. TO PERFORM A DUAL ENGINE RUN UP FOR VIBE SURVEY DUE TO A FAN LUBE PERFORMED EARLIER. 2. AFTER A TWO MINUTE SLOW ACCELERATION TO POWER AND STABILIZED AT POWER FOR A FEW SECONDS THE MAINTENANCE CREW BEGAN DECELERATION WHEN THE AIRCRAFT BROKE FREE AND STARTED TO SLIDE WITH THE BRAKES SET. 3. THROTTLES WERE RETARDED TO IDLE AND MANUAL BRAKING WAS APPLIED WITH NO EFFECT. 4. AIRCRAFT CAME TO REST ON THE EMBANKMENT BEYOND THE EAST END OF ECHO TAXIWAY. 5. THE AIRCRAFT WAS RECOVERED BY DELTA AIR LINES GO-TEAM TO A SAFE POSITION.6. THE COCKPIT VOICE RECORDER AND FLIGHT DATA RECORDER HAVE BEEN QUARANTINED. 7. THE INCIDENT IS CURRENTLY UNDER INVESTIGATION BY THE DELTA CMO.