B737-300
Maintenance Airframe; Maintenance Powerplant
Maintenance Technician 24
Communication Breakdown; Fatigue; Situational Awareness
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Aircraft Aircraft Damaged; General Maintenance Action
Aircraft; Human Factors
I received notice that during a scheduled Routine Inspection; the #1 Slat Can had sustained damage on a B737-300 aircraft. The #1 Slat was replaced on a C-Check by me as evidenced on Non-Routine Card. I did have assistance; however; I don't recall who specifically that person(s) was. Although it has been over nine months since I replaced that slat; I am confident that the subject [Slat track] downstop was installed at that time in accordance with the Aircraft Maintenance Manual (AMM). In addition; this task is a Required Inspection Item (RII) and was identified and inspected as such. With over 24-years as licensed Aircraft Maintenance technician (AMT); I have performed numerous slat replacements and know how critical it is to ensure that no debris is allowed to enter the Slat Can. This aircraft has been through numerous Maintenance Visits since that C-Check to include a [Phased] Heavy Maintenance Visit. [I was] on duty twenty-two hours.
An experienced Aircraft Maintenance Technician (AMT) was informed that a # 1 Slat Can compartment was found damaged on a B737-300 aircraft after he had replaced the slat. The aft downstop on one of the slat's main track arm's had fallen into the compartment.