NTSB Identification: DEN83FA021
Scheduled 14 CFR Part 121: Air Carrier operation of CONTINENTAL AIR LINES, INC.
Accident occurred Thursday, November 18, 1982 in DENVER, CO
Probable Cause Approval Date: 11/18/1983
Aircraft: MCDONALD DOUGLAS DC-10, registration: N68056
Injuries: 136 Uninjured.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

DURING THE TAXI FOR TAKEOFF, THE CREW NOTED A HYDRAULIC MALFUNCTION ON THE RIGHT MAIN GEAR AND RETURNED TO THE GATE FOR MAINTENANCE. THE AIRCRAFT WAS SHUT DOWN AND TURNED OVER TO THE MAINTENANCE CREW FOR REPAIR. THE PASSENGERS WERE NOT DEPLANED. DURING MAINTENANCE TROUBLESHOOTING PROCEDURES FOR THE HYDRAULIC LEAK, THE GEAR HANDLE WAS RAISED WITHOUT THE GEAR LOCKING PINS INSTALLED. THIS ALLOWED THE NOSE GEAR TO RETRACT AND THE NOSE SETTLED ONTO A PARKED TUG. INVESTIGATION REVEALED THAT THE APPLICABLE CHECKLIST WAS NOT USED AND POSITIVE COMMUNICATIONS WERE NOT ESTABLISHED BETWEEN THE MAINTENANCE PERSONNEL IN THE COCKPIT AND THOSE ON THE GROUND.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

LANDING GEAR,GEAR LEVER..DEPLOYED INADVERTENTLY

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

PROCEDURES/DIRECTIVES..NOT FOLLOWED..COMPANY MAINTENANCE PERSONNEL

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