What was found
FLT#149, JFK-CHS. (AIRCRAFT PERFORMED AN AIR TURN BACK TO JFK) ' R1 DOOR SHOWED DISARMED AFTER TAKEOFF. SLIGHT PRESSURE ON THE ARMING LEVER WOULD SHOW ARMED BUT WOULD NOT STAY; PERFORMED VISUAL INSPECTION OF R1 DOOR SLIDE, FOUND THE RIGHT TELESCOPIC FORK NOT FULLY ENGAGING TO LOCK GIRT BAR IN THE FLOOR FITTING AND RE-INSTALLED GIRT BAR WITH FULL TELESCOPIC FORK ENGAGEMENT PER AMM 25-62-44-420-065A STEP 4.'