What was found
MDIS 656 26-20 4661 18APR22 LBB OPEN U DURING PREFLIGHT, FOUND #2 ENGINE AGENT 1 DISCHARGE LIGHT ON. DURING TROUBLESHOOTING FOUND ONE OF THE PINS ON PRESSURE SWITCH CANNON PLUG NOT FULLY SEATED INTO PLUG. AFTER ENGAGING PIN IN PLUG PERFORMED OPS CHECK OF #2 ENGINE FIRE IN REFERENCE WITH AMM 26-21-00-05. OPS CHECK GOOD. ALL WORK DONE IN REFERENCE WITH AMM 26-21-15-04, WM 26-21-00, AND ESPM 20-44-10. AC OK TO CONTINUE SERVICE. REMOVED PLACARD REMOVE FROM