What was found
LT OVERWING SLIDE REMOVED FROM ACFT. C/W A "SAMPLE" DEPLOYMENT IAW MAINT PROGRAM REQUIREMENT. AT INITIATION OF LT SLIDE DEPLOY, INFLATABLE STARTED TO INFLATE, BUT FWD LATCH OF BLOW OUT PANEL DIDN`T FULLY OR RETRACT, CAUSING PANEL TO SPLIT. SLIDE DID FULLY DEPLOY IN 9 SECONDS & HELD PRESSURE. MX DEFLATED SLIDE & INSTALLED A SERVICEABLE UNIT. SLIDE DIDN'T DEPLOY WHEN LT AFT EXIT REMOVED. SLIDE DEPLOYED WHEN LT FWD EXIT REMOVED. MAINT C/W CABLE RIG CK AMM 52-21-00-720-001 & CK'D OK. FWD PNEU PIN BALL LOCK CENTER SPINDLE O-RING WAS DETERIORATED & FOUND TO BE LIKELY CAUSE DUE TO CONTAMINATION & REDUCED REACTION TIME. FWD BALL LOCK DIDN`T RELEASE OR RELEASED TOO LATE.