A DC-10-30 ACFT MECH DESCRIBES THE CHAIN OF EVENTS THAT CAUSED MULTIPLE DAMAGE TO THE TAIL ENG REVERSERS AND WORK PLATFORM DOORS DURING NOSE GEAR JACKING AND DEJACKING.

Narrative

TOOK OVER NOSE LNDG GEAR STRUT REPACK FROM PREVIOUS SHIFT. ACFT HAD ALREADY BEEN JACKED AT THE NOSE ONLY; WHILE ACFT WAS ALREADY IN THE TAIL MAINT STAND. PREVIOUSLY THE ACFT WAS DAMAGED DUE TO OVER-JACKING AND MAKING CONTACT WITH THE STAND. THIS SET UP A CONDITION WHERE THE NOSE WAS STILL TOO HIGH; MAKING THE TAIL EXTREMELY LOW. AFTER COMPLETION OF THE REPACK; WE LOWERED THE NOSE JACK ONLY TO FIND OUT THE ACFT'S WORK PLATFORM DOOR HAD CONTACTED THE STAND. I BELIEVE THE SITUATION WAS SET UP BY PERFORMING MULTIPLE TASKS SIMULTANEOUSLY WITH THE ACFT DOCKED IN STANDS. ALTHOUGH I FEEL IT WOULD NOT BE REAL EFFICIENT FROM A TIME STANDPOINT; IT COULD BE CORRECTED BY REFRAINING FROM THIS TYPE OF MAINT WITH ACFT DOCKED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED THE NOSE GEAR STRUT WAS IN FOR A STRUT REPACK MAINT. THE ENGINE REVERSERS WERE DAMAGED EARLIER WHEN THE PREVIOUS SHIFT INITIALLY JACKED THE NOSE GEAR. THE NOSE JACK HAD BEEN LOWERED SLIGHTLY TO LIFT THE TAIL ENG REVERSERS OFF OF THE HANGAR FLOOR WORK STAND. BUT; NO ONE NOTICED THAT THE EDGE OF THE WORK PLATFORM; ALSO KNOWN AS THE PATIO DOORS; AND PART OF THE TAIL ENG FAIRING; WERE STILL ANGLED UNDER THE EDGE OF THE HANGAR FLOOR WORK STAND. WHEN THEY LOWERED THE NOSE GEAR JACK; THE TAIL CAME UP; STRIKING THE HANGER FLOOR STAND. REPORTER STATED WITH 30 TO 40 MECHANICS ACTIVELY WORKING ON THE ACFT AT THE SAME TIME; MOVING STANDS AND LADDERS; THE ENVIRONMENT AROUND THE ACFT IS CONSTANTLY CHANGING. HE FEELS BETTER COMMUNICATIONS AND COORDINATION; ESPECIALLY WHEN JACKING OR LOWERING THE ACFT; WOULD HAVE MADE A DIFFERENCE.