As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 630 - PHX-PIT - ODOR - SHORTLY AFTER TAKEOFF, CAPTAIN REPORTED "OILY RAG" SMELL IN COCKPIT. FLIGHT ATTENDANT IN FRONT OF AIRCRAFT ALSO REPORTED SAME SMELL CREW WENT ON OXYGEN AND LANDED SAFELY. FIRST OFFICER EXPERIENCED SLIGHT BURNING SENSATION IN NOSE. PER JOBCARD 4736548, LEFT AIR CYCLE MACHINE (ACM) REPLACEMENT REQUIRED. REMOVED AND REPLACED LEFT ACM PER AMM 21-52-21-400-001-0. OPERATIONAL CHECK GOOD.