What was found
AFTER TAKEOFF CREW NOTED PUNGENT ELECTRICAL/BURNING ODOR IN COCKPIT. SMELL CLEARD SHORTLY AFTER LANDING. MX T/S ISSUE IN REF TO FIM 21-20-00-810-801-A. NO DEFECTS NOTED. PERFORMED OPS CHECKS OF BOTH BLEED SYST EMS, BOTH PACK SYSTEMS AND ANTI ICING SYSTEMS WITH CREW. NO DEFECTS NOTED. OK FOR SERVICE. MX T/S BURNING SMELL REF LP 221437-1. REMOVED R/H AND L/H RELAY PANELS AND INSPECTED RELAYS. NO DEFECTS NOTED. REINSTALLED BOTH R/H AND L/H RELAY PANELS. OK FOR SERVICE.