As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROX 20 MINUTES AFTER TAKEOFF, LOST CONTROL OF CABIN PRESSURE DUE TO LEAK AT 28,000 FEET. A LOUD NOISE OCCURRED AT THE SAME TIME. RETURNED TO GSO, LANDING NORMAL. INSPECTION FOUND NR 2 WATER SEPARATOR HAD BLOWN DUCT. REMOVED AND REPLACED WATER SEPARATOR IAW 21-51-51. OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE. (M)