What was found
STRONG ODOR OF FUEL IN CABIN, MIGRATED TO FLIGHT DECK DURING DESCENT. ESTABLISHED ON ENGINE BLEEDS & KEPT APU OFF. ODOR WENT AWAY ON LANDING. (FLIGHT 5060) COMPLIED WITH FIM 21-21-00, PERFORMED INSPECTION OF APU FUEL SYS IAW AMM 49-31-00, NO LEAKS NOTED. FOUND & CLEAN RESIDUAL FUEL IN APU ENCLOSURE. PERFORMED OPS CHK OF APU & BOTH ENGINES IAW AMM 49-10-00 & 71-00-00. OPS CHKD GOOD. PERFORMED OPS CHECK OF AIR CONDITIONING SYS IAW AMM 21-51-00. COULD NOT DUPLICATE STRONG ODOR. R & R BOTH LT & RT COALESCER BAGS IAW 21-51-13. OPS CHKD GOOD.