As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 918 - LYH-IAD - DURING CLIMB, EXPERIENCED A DISCREPANCY WITH THE AIRCRAFT PRESSURIZATION SYSTEM. AIRCRAFT RETURNED TO LYH WITH NO PROBLEM. MAINTENANCE WAS DISPATCHED TO TROUBLESHOOT THE DISCREPANCY. MAINTENANCE PERFORMED SEVERAL PRESSURIZATION CHECKS BUT COULD NOT FIND ANY PROBLEM. ALL CHECKS WERE ACCOMPLISHED IAW MAINTENANCE PROCEDURES AND THE AIRCRAFT WAS RELEASED FOR SERVICE. (M)