As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4572 - CLIMBING THROUGH FL250 INFLIGHT FROM ATL TO CRP, CREW RECEIVED A HYDRAULIC NR 1 LOW PRESSURE MESSAGE. HYDRAULIC QUANTITY IN SYSTEM NR 1 INDICATED ZERO PERCENT. CREW DECLARED AN EMERGENCY AND DIVERTED TO BHM. AIRCRAFT LANDED SAFELY. MAINTENANCE FOUND CHAFFED STEEL BRAIDED HYDRAULIC LINE IN APU BAY. MAINTENANCE REMOVED AND REPLACED LINE AND NR 1 ENGINE HYDRAULIC PUMP. OPS AND LEAK CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE. (M)