What was found
CAPTAIN`S SIDE AFT WINDOW SEAL SQUEALS LOUDLY PASSING FL300 TO FL340. NOISE WENT AWAY AT 300. CREW SAID THE SOUND (SQUEAL) WAS COMING FROM BETWEEN NR 2 & 3 WINDOWS UPPER AREA AND AIR WAS HEARD FROM THE LOWER SIDE OF NR 2 WINDOW. REMOVED L2 WINDOW PRESSURE SEAL, CLEANED SEAL RETAINER FRAME AND ADJACENT AREA AND INSTALLED NEW PRESSURE SEAL UP TO STEP E-4-H PER AMM REF. 56-11-53. APPLIED FILLET SEAL TO NR 2 WINDOW AT 11 O`CLOCK IAW AMM 56-11-53-404-004 UP TO AND INCLUDING STEP E.(4).(L). NO LEAKS OR SQUEALS NOTED, ALL INDICATIONS NORMAL, OKAY TO CONTINUE.