What was found
AIRCRAFT RETURNED OF FLIGHT DURING CLIMB FLOW LIGHT TURNED ON AND PRESSURIZATION DID NOT WORK IN MANUAL MODE. A LEAK CHECK WAS PERFORMED AND FOUND LEAK IN SLEEVE AIR COOLING TURBINE. A CLAMP WAS TIGHTENED IAW MM. THE LEAK WAS CORRECTED AND PRESSURIZATION CONTROL WAS INTERCHANGED IAW. THE PRESSURIZATION CHECK WAS PERFORMED WITH 2 DIFFERENTIALS IN AUTOMATIC MODE AND 3 DIFFERENTIALS IN MANUAL MODE, OPERATING CORRECTLY. DURING OVERNIGHT CHECK WAS VERIFIED BOTH PACKAGES FOR LEAKS, DETECTING SOME LEAKS DUE TO CLAMP DAMAGE. LEAKS WERE CORRECTED AND CLAMPS WERE REPLACED IAW MM. THE PRESSURIZATION CHECK WAS PERFORMED IN MANUAL AND AUTOMATIC MODE IAW MM, BEING CORRECT.