As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GUM - DURING TRAINING, FOUND FIRST OFFICERS SLIDING WINDOW WILL NOT OPEN WITH THE EMERGENCY EXTERIOR HANDLE. MAINTENANCE ADJUSTED THE LOWER FORWARD BELLCRANK. OPERATION CHECK GOOD PER MM 56-12-0 AND TESTED PER MM 56-12-11 PG 505 PARA B. (M)