As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE WITH ANTI-ICE ON L DUCT PRESS DROPS TO 5 PSI WITH INTERMITTENT L BLEED OFF EICAS.(<P>T/S PER FIM 36-10 F/T 837. CKD ALL LINES FOR PROPER CONDITION RE-TORQUE ALL B NUTS CKD WIRING CLEANED CONNECTOR RAN ENG NO FAULTS, A/C OK FOR SERVICE.</P>)