As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BNA - FLT 1138 - DURING CRUISE, AIRCRAFT EXPERIENCED RAPID COMPRESSION. UNABLE TO HOLD CABIN PRESSURE. DIVERTED AND LANDED BNA WITHOUT INCIDENT. INSPECTED EXTERIOR OF AIRCRAFT AND ALL DOOR SEALS. COULD NOT DUPLICATE DEFECT. REPLACED BOTH PRESSURE CONTROLLERS AS PRECAUTION, S/N 103599 AND 591749. SYSTEM GROUND CHECK NORMAL OPERATION. (M)