What was found
PER FLT CREW VERBAL, CAPT SIDE WINDOW LOCKING HANDLE IS JAMMED UNABLE TO SECURE CLOSED. APPEARED SECURED CLOSED WHEN DEPARTING SJC BUT HAD A MASSIVE AIR LEAK. DECLARED EMERGENCY. CAPT REPORTS AIR LEAK AT LT SLIDING WINDOW UNABLE TO DUPLICATE. PRESSURIZED CABIN TO 4.0 PSID NO UNUSUAL NOISE OR LEAKAGE DETECTED PER MM05-51-91-790-801. CAPT SLIDING WINDOW OPERATES NORMAL, NO BINDING, NO DAMAGE NOTED. OK FOR SVC.