What was found
SUPPLEMENTAL DOOR PAX AFT OPEN MSG DURING CRUISE, DISAPPEARED WHEN BEGINNING DESCENT-C/A-FLIGHT CREW PLACARDED L2 DOOR INDICATION. M PROCEDURES C/W. MEL 25-57 AUTH 030235M-C MOC 437847. INTERROGATED CMC FOR FAULT CODE 52122101PSS, AND TROUBLESHOT IAW FIM 52-72-00-810-802-A BLOCK 2. FOUND GAP BETWEEN LATCHED SENSOR AND TARGET TO BE WITHIN LIMITS. FOUND DIMENSION W (AMM 52-72-21-820-801-A) TO BE OUT OF LIMITS. ADJUSTED AFT PAX DOOR EXTERNAL STEPS IAW AMM 52-12-00, BUT COULD NOT GET DOOR STEP DIMENSION AND DIMENSION W WITHIN LIMITS SIMULTANEOUSLY. REQUIRES FURTHER TROUBLESHOOTING. MEL REMAINS OPEN. ADJUSTED AFT PAX DOOR EXTERNAL STEPS IAW AMM 52-12-00-820-805-A TO ATTAIN DIMENSION W IAW AMM 52-72-21-820-801-A. OPC GOOD, NO FURTHER DEFECTS NOTED. MEL RESTORED.