What was found
FAULT CODE 361 012 02- RE-ESTABLISHED BLEEDS AFTER TAKE OFF, NO - ENGINE BLEED SUPPLEMENTAL PROCEDURE, NUMBER 2 BLEED TRIP OFF LIGHT ILLUMINATED. QRH PERFORMED. LIGHT INITIALLY EXTINGUISHED, THEN A SHORT TIME, 1 MIN, #2 BLEED TRIP OFF RE-ILLUMINATED. QRH, AND IN CRUISE FLT, TURNED RIGHT PACK ON (FODO/DISPATCH MESSAGE REQUEST) OPS OKAY. GROUNDED - YES. REMOVED AND REPLACED #2 ENGINE PRE-COOLER REF B737-900 AMM 36-12-01.