What was found
FUMES DETECTED AT THE TOP OF CLIMB. OPERATED APU AND PERMORNED A LEAK CHECK IAW AMM 49-00-00, FOUND A PINHOLE SIZE CRACK ON THE ACCESORY CASING. CHECKED FOR LEAKS OF HYDRAULIC COMPONENTS IAW AMM 29-00-00-790-001-A. NO LEAKS NOTED. REMOVED AND INSPECTED THE NR 1 PACK. ENGINE BLEED 1 & 2 WERE ON, NO ODORS IN THE COCKPIT. BOTH PILOTS EXPIRENCED FUMES IN THE COCKPIT ON THE PREVIOUS DAY. INSPECTED NR 1 & 2 ENGINE INLET CONES FOR OIL CONTAMINATION IAW AMM 7238-11. NO LEAKS NOTED.