What was found
NR 2 PNEUMATIC MANIFOLD FAILURE LIGHT ILLUMINATED WITH TWO PACKS OFF AND TWO PNEUMATIC SYSTEMS OFF. AGAIN EXECUTE VOL II 01-10-09 EMERGENCY PROCEDURE. FOUND EXCESSIVE HOT AIR LEAKAGE FROM NR 1 AND NR 2 HEAT EXCHANGERS TO BOTH ACM'S CONNECT SLEEVES AND FROM BOTH HEAT EXCHANGERS TO PLENUMS INTERFACE. SECURED NR 2 PACK SLEEVES AND HEAT EXCHANGER TO PLENUMS. LEAK CHECK FOUND GOOD DURING TEST WITH MODERATE PWR ON ALL 3 ENGINE. NO AMC NR 2/3 OR PNEUMATIC SYSTEMS FAULTS NOTED. VISUALLY CHECKED ACCESSIBLE NR 2 MANIFOLD AND NO OBSERVED LEAKS NOTED. DEFERRED NR 1 PACK INOPERATIVE IAW MEL 21-1 ESTABLISHED ON NR 1 ENTERED DMI M21JUU23-44, HEAT EXCHANGER LEAK. AIRCRAT RETURNED TO LGSA FOR REPAIRS. REMOVED AND REPLAC