As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 5118 - SAN-LAX - PILOT REPORTED THAT THE LT BLEED HAD A STRONG OILY SMELL WHEN USED. MAINTENANCE PERSONNEL DETERMINED THAT THE PROBLEM ASSOCIATED WITH THE LT BLEED CAME WITHIN THE PARAMETERS OF MEL REFERENCE 21-01 (AIR CONDITIONING PACKS) AND IT WAS DEFERRED NR 010070. AIRCRAFT RETURNED TO SERVICE.