B737-700
Maintenance Airframe; Maintenance Powerplant
Communication Breakdown
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action; General Flight Cancelled / Delayed
Aircraft; Procedure; Manuals; Human Factors
I installed [Company 1] emergency evacuation slides on aircraft in the service aft and service forward position. I was notified on my drive home by the dayshift supervisor that the inflight crew found the gurt bars were the wrong length and would not attach. Not being familiar with the [Company 1] slides; I did not know the gurt bars are a different length and position specific. I assumed they could be installed in every position just as the [Company 2] slides/gurt bars can be. I relied on my lead to print MPD25 after I turned in my parts tags and paperwork. I did not realize the [Company 1] have an A or and F in the serial number that notates what position they should be installed in; as there is no documentation of this. I should have checked MPD25 myself before installing the slides. I believe my 'norm' of installing [Company 2] slides that fit in every position and relying on my lead to print MPD25 contributed to my error. In the future I will check MPD25 before installing all parts and I'm truly sorry for this event causing a delay for our passengers.
Technician reported installing emergency evacuation slides in the wrong doors.