As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF, SMELLED INITIAL ODOR IN COCKPIT AND CABIN. RESEMBLED BURNING IN OVENS BUT MORE ACRID. LATER DESCRIBED AS CHEMICAL ELECTRICAL SMELL. FLT RETURNED TO STL. FOUND BIRD HAD BEEN INJESTED IN LT ENGINE AFFECTING THE PNEUMATIC SYSTEM. ACCOMPLISHED BIRD STRIKE INSPECTION. NO DAMAGE TO ENGINE. CHECK-C 9-5-97 STL. (X)