Narrative:

When I arrived at the aircraft [to address a maintenance issue] the flight crew was already on board. After I determined what the problem was I went to the jet bridge to call maintenance control. At the same time there was a flight attendant using the other phone on the jet bridge. As I was talking the flight attendant paused her conversation to ask me if it was ok to board the aircraft. I replied; 'no; it is not ok to board; please hold boarding'. She then advised the gate agent 'the mechanic said no; it is not ok to board'.after I finished my conversation with maintenance control; I went back to the cockpit to inform the captain. I also informed the flight crew and the flight attendants that I had to go down in the east&east compartment to do a 'bite' test on the IRU; and for them to not let any one near this area. At that point I proceed to go to the east&east compartment through the floor entrance.shortly after I entered the east&east compartment I heard a noise. I looked to my right and discovered that someone had fallen into the east&east compartment. I asked the passenger if he was ok and he confirmed that he was. At that point I called out for help. After what seemed to be a minute or two the passenger stood up. I asked him again if he was ok and he said 'yes; I am ok'. At that point I watched him as he climbed out of the east&east compartment.

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Original NASA ASRS Text

Title: A Mechanic who needed to access the E&E compartment of a B767-300ER asked that boarding be delayed until he finished his maintenance procedure. When boarding commenced nothwithstanding his alert a passenger fell through the floor access to the E&E compartment; suffering only minor injury and temporary disorientation.

Narrative: When I arrived at the aircraft [to address a maintenance issue] the flight crew was already on board. After I determined what the problem was I went to the jet bridge to call Maintenance Control. At the same time there was a Flight Attendant using the other phone on the jet bridge. As I was talking the Flight Attendant paused her conversation to ask me if it was OK to board the aircraft. I replied; 'No; it is not OK to board; please hold boarding'. She then advised the gate agent 'the mechanic said no; it is not OK to board'.After I finished my conversation with Maintenance Control; I went back to the cockpit to inform the Captain. I also informed the flight crew and the flight attendants that I had to go down in the E&E compartment to do a 'BITE' test on the IRU; and for them to not let any one near this area. At that point I proceed to go to the E&E compartment through the floor entrance.Shortly after I entered the E&E compartment I heard a noise. I looked to my right and discovered that someone had fallen into the E&E compartment. I asked the passenger if he was OK and he confirmed that he was. At that point I called out for help. After what seemed to be a minute or two the passenger stood up. I asked him again if he was OK and he said 'yes; I am OK'. At that point I watched him as he climbed out of the E&E compartment.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.