B767-400 and 400 ER
Training / Qualification; Communication Breakdown; Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Maintenance; Flight Deck / Cabin / Aircraft Event Other / Unknown
Human Factors; Procedure
Aircraft X returned to Gate X for Maintenance. Employee X; Employee Y and I had some sort of idea on how to address the problem. We meet the aircraft at Gate X; [I'm] on head set communicating with the flight crew. I proceeded to ask the crew to re-initialize the IRS (Inertial Reference System); with no success. Meanwhile; Employee X had requested the jet bridge to be connected to the aircraft so we can have access to the aircraft ;also power cord from jet bridge...While Partner Employee Y and someone from zone 4 Employee X ;very help I might add; were in the Electronics and Equipment compartment troubleshooting the problem. Employee Z came down from Electronics and Equipment [compartment]. Shortly after; Employee X stated from outside the aircraft that she was going UP didn't think anything of it until Employee X told me look up the hole; someone fell down through the floor access above the Electronics and Equipment compartment. Employee X had opened it without any clearance from me or anyone else; don't know what possessed her to open the hatch. General Maintenance Manual procedures. Only in remote location can we access the flight deck above; not during a live flight with jet bridge by then already connected.
Maintenance opened cabin hatch to electronics bay without authorization and someone fell through it.