As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRIOR TO INSTALLING BLEED VALVE ON TEST BENCH, AN INSPECTION OF ALL SAFETIES WAS ACCOMPLISHED AND FOUND 3 EACH BOLTS WERE SAFTIED BUT LOOSE. THESE BOLTS WERE IMPROPERLY TORQUED AND CAUSED A MAJOR AIR LEAK AT SPLIT LINES OF BLEED VALVE.