As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L PACK TEMP ON CLIMBOUT. L PACK OPERATES NORMALLY ON GROUND WITH APU AIR. ON ENGINES SURGING WAS NOTICED FOLLOWED BY EICAS MESSAGE. REPEAT WRITE-UP(<P>C/W WO# 84275 REV. D REMOVED AND REPLACED L/H FLOW CONTROL AND SHUT OFF VALVE IAW AMM 21-51-01. OPS CHECK GOOD.</P>)