What was found
MAIN CABIN DOOR INTERMITTENTLY DOES NOT OPEN FROM THE OUTSIDE AND INSIDE EVEN IF YOU PULL THE PRE-CATCH, THE DOOR DOES NOT OPEN. YOU NEED TO RE-LOCK THE DOOR AND THEN OPEN AGAIN. "CORRECTIVE ACTION" CLEANED AND LUBRICATED CABIN DOOR PINS PER CE560XLS AMM 52-10-00. DOOR CONTINUED OPENING INTERMITTENTLY. ADJUSTED PRECATCH PER CE560XLS AMM 52-10-01. CYCLED DOOR AGAIN AND ADJUSTED PRECATCH UNTIL DOOR OPERATED NORMALLY. OPS CHECKS GOOD.