As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOSS OF B-SYSTEM PRESSURE IN FLT. BRAKE PRESSURE RESTORED AFTER LANDING GEAR EXTENSION. ACCOMPLISHED SYSTEM-B LOSS PROCEDURES IAW 727-POM. REPLACED HYDRAULIC PRESSURE LINE FROM NR 2 B-PUMP QUICK DISCONNECT FILTER MODULE. LEAK AND OPERATIONAL CHECK NORMAL.