B757-200
Maintenance Inspection Authority; Maintenance Powerplant; Maintenance Airframe
Training / Qualification; Situational Awareness; Human-Machine Interface
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Aircraft; Human Factors; Incorrect / Not Installed / Unavailable Part
While installing the monthly NAV DATA update; the wrong aircraft type was installed; [that is] MD-11 database [loaded] in a B-757 aircraft. I was using a new type 409 Data Bus Loader that was formatted slightly different and failed to notice the wrong aircraft type load was installed. I only checked the current data date; but failed to notice the fleet type difference. Wrong NAV DATA installed in FMS.
A Line Mechanic was informed he had loaded an MD-11 NAV DATA update into a B757-200 aircraft. He had used a new type 409 Data Bus Loader and checked the current data date; but failed to notice the fleet type difference.