What was found
CAP. LEFT WINDOW DELAMIN ATED. CREW BRIEFS THAT CAPTAIN LEFT SIDE WINDOW DELAMINATED IN FLIGHT, PHOTOS FROM CREW ATTACHED. EXTREME LOUD NOISE AND VIBRATION NOTICED SOON AFTER TAKEOFF, LAYER OF ICE FORMED AND VIBRATION WAS VISIBLE FROM FLIGHT DECK. DELAMINATION STARTED FROM BOTTOM OF L2 WINDSHIELD INTO CENTER. STARTED REMOVAL OF LEFT #2 WINDOW UP TO AND INCLUDING STEP C (4) (A) REF AMM DMC-B787-A-56-11-05-00A-520A-A STARTED REMOVAL OF FASTNERS ON CD POST. SOME ARE STRIPPED AND WILL REQUIRE DRILLING COMPLETED FLIGHT COMPARTMENT #2 WINDOW REMOVAL PROCEDURE REF AMM DMC-B787-A-56-11-05-00A-520A-A .INSTALLATION AND OP CHECK REQUIRE LEFT NUMBER 2 FLIGHT DECK WINDSHIELD INSTALLATION ACCOMPLISHED UP TO STEP 4 LINE R REF AMM 56-11-05, DWELL TIME OF 8-12 HOURS REQ BEFORE FINAL TORQUE AND SEALANT REF ECRA 5611-01378 PTFE DRY FILM LUBRICANT MS-122XD WAS USED IN LIEU OF MS-122AD .