What was found
C/P AND F/O REPORTED ODOR IN FLIGHT DECK. ENTERING FLIGHTDECK NO SMELL OF ODOR AFTER GETTING TO GATE UNABLE TO RUN PACK 1 LONG ENOUGH TO VERIFY ODOR DOES NOT RETURN, PER AMM TASK 05-51-26-800-801-C1, AS PACK 1 IS CURRENLTY FAULTING REF LOG PAGE 3276326. AMM REQUIRES 5 MINUTES OF OPERATION, PACK FAULTS AND SHUTS OFF AFTER 2.5 MINUTES. REPLACE RECIRCULATION FILTERS R & R LT & RT RECIRC FILTERS REF AMM 21-25-01, RAN APU WITH PACKS ON, NO ODOR DETECTED. RAN ENG 1 WITH PACKS ON, NO ODOR DETECTED. RAN ENG 2 WITH PACKS ON NO ODOR DETECTED. REF AMM 71-00-00. OPS CHECK GOOD. NO ODOR DURING APU OPS OR ENGINE OPS