What was found
WHEN ARMING THE SLIDES FOR DEPARTURE, RT SLIDE LIGHT DID NOT ILLUMINATE. RELEASED FOR SERVICE IAW MEL 25-66-04-B, CATEGORY C. VERIFIED SLIDE ARMED LT DOES NOT ILLUMINATE WHEN R1 DOOR SLIDE IS ARMED. PERFORMED GVI OF R1 DOOR ESCAPE SLIDE GIRT BAR, SKIRT & LANYARDS, NO DEFECTS. GIRT BAR ENGAGES NORMAL WITH NO DEFECTS. NO RIGGING OR ADJUSTMENTS MADE TO R1 DOOR ESCAPE SYS. CHECKED R1 DOOR SLIDE ARMED LT MODULE FUNCTION AT L1 DOOR POSTION, SLIDE ARMED LIGHT FUNCTIONS NORMAL. REINSTALLED SLIDE ARMED LIGHT MODULE. REINSTALLED R1 DOOR SLIDE ARMED LIGHT MODULE, SLIDE ARMED LIGHT OPS CHECKS GOOD. BOTH R1 & L1 DOOR SLIDE ARMED LIGHTS FUNCTION NORMAL. REINSTALLED R1 DOOR SLIDE COVER. ACFT OK FOR SERVICE.