As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A/C NOISE VERY LOUD EVEN WITH RT RECIRC FAN OFF WITH ALL VENTS OPEN. CHK'D FLIGHT DECK NOISE LEVEL PER SVC TIP 21-22-00 & FOUND DB LEVEL TO MEASURE AT 79, 70.5 IS LIMIT. CONFIRMED PACKS ARE NOT STUCK IN HI FLOW PER REF'D SVC TIP METHOD 2. REPLACED LT PACK FLOW CONTROL & SHUTOFF VALVE IAW MM. CHECKS GOOD IAW SERVICE TIP MM.