What was found
ETOPS - ENG 2 AIR EXCHANGER FAULT // PERFORMED TSM 79-20-00-810-810-A. BITE TEST OF EEC2 GOOD. FOUND VALVE OF AIR/OIL HEAT EXCHANGER HARD TO MOVE. 2133186 07FEB22. NEED TO CONTINUE WITH REPLACEMENT OF AIR/OIL HEAT EXCHANGER. REMOVED AND REPLACED #2 ENG AIR/OIL HEAT EXCHANGER PER AMM 79-21-51. OPS/LEAK CHK GOOD. NO FAULTS. OK FOR SVC. COOLER, OIL-AIR OFF 43-7921-9-0001 S/N 74995 ON 43-7921-9-0001 S/N 74703