As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT BLEED TROUBLE, ACCOMPLISHED HEALTH CHECK OF PRSOV AND REPLACED SOURCE AIR SWIVEL FITIING. SWIVEL LOOSE WHILE 'B' NUT SEIZED. IDLE OPS CHECKED AND FOUND NR 1 BLEED PRESS FLUCTUATES BETWEEN 12-15 PSI. REPLACED CONTROL PRESSURE SENSE LINES, SOLID AND FLEX LINES. PERFORMED NR 1 ENG RUN, APPLIED PNEUMATIC LOAD, OPS CHECKED NORMAL.