What was found
ZONE TEMP LIGHT ILLUMINATED ON CONT CABIN DURING M/C RECALL. LIGHT EXTINGUISHES WHEN M/C SYSTEM IS RESET. INTERROGATED BOTH NR 1 & NR 2 ZONE TEMP CONTROLLERS PER AMM 21 61 00. ZONE TEMP CONTROLLER NR 1 FAULTED: CONTROL CABIN ZONE TRIM AIR MOD VALVE. REMOVED AND REPLACED TRIM AIR MOD VALVE PER AMM 21 61 21. ETOPS SIG SYSTEM: PART VERIFIED BY SEAMC, 2DN VALVE IN 2 DAYS. BOTH ZONE TEMP CONTROLLERS INTERROGATED. NO FAULTS FOUND. C/B P6 4 ROW B NUMBER C01167 OPENED AND THEN CLOSED AFTER COMPLETION OF WORK (MIG51A 10202). NOTIFIED SEAMC.