What was found
STRONG AND RAPID ONSET OF FUMES IN THE COCKPIT. ODOR UNIDENTIFIED. CREW RESPONDED WITH OXYGEN MASKS, QRC, FOLLOWED BY QRH THEN DIVERT TO SHV. ***EMERGENCY DECLARED*** T/S PER FIM 21-00-21-3. PERFORMED EXTERNAL INSP OF RT AND LEFT ENGINES.NO LEAKS NOTED, INSPECTED BOTH PACK BAYS. NO DEFECTS FOUND. RAN ENGINES AT IDLE WITH BLEEDS ISOLATED AND ALSO PACKS ISOLATED. NO FUMES PRESENT. INSPECTED FWD E/E DURING ENGINE RUN. NO FUMES PRESENT. OPERATED L/H AND R/H PACK INDIVIDUALY NO NOTICEABLE SMELLS OR FUME NOTICED REF AMM 24-51-00. ALSO PRESUREISED A/C WITH BOTH PACKS FOR 45 MINS NO NOTICEABLE SMELLS OR FUMES NOTICED REF AMM 21-31-00.. INSPECTED GALLEY AND OVERHEAD BIN AND LAV AREA , ACCESSABLE MAIN AND LOWER CARGO DECK AREAS NO NOTICEABLE SMELLS AND FUMES NOTICED AT THIS TIME A/C HAD BEEN CLOSED UP FOR 3 HOURS. FOUND EQUIPTMENT COOLING AIR CLEANER I N POOR CONDITION. REPLACED SAME PER AMM 21-58-30-2. LEAK CHECK GOOD. REMOVED AND REPLACED ACARS MULTIFUNTION PRINTER AS PRECAUTIONARY. REF AMM 31- 32-01-4. ALSO REMOVED -INSPECTED AND REINSTALLED FLIGHT COMPARTMENT TRIM AIR MODULATING VALVE PER AMM 21-61-07-4-3. NO DEFECTS NOTED. NO DEBRIS OR RESIDUE INSIDE DUCT TO FLIGHT COMPARTMENT. AFTER REPLACEMENT OF EQUIPTMENT COOLING CLEANER, RAN ENGINES AT IDLE PER JRH AND NO FUMES NOTED.