What was found
INSPECTION TYPE: ETOP IN FLT FL350 M80 AFTER AND DURING TRANSMITTING NOTICE ACRID ODOR IN COCKPIT, NO OTHER INDICATIONS NOTED. COULD NOT ISOLATE OR IDENTIFY SOURCE OF ODOR 1 PACK OPS, PRIOR TO COAST OUT HF COULD NOT BE OPERATED FOR 45 MINS EVENTUALLY TO WORK, SUSPECTED FUMES. RT PACK TEMP RUNS CONTINOUS. DEFER RT PACK IAW MEL 21-51-1-0-1. M311331 REMOVED AND REPLACED RT PACK TEMP CONTROL VALVE IAW AMM 21-51-12-4. THIS CLEARS DMI M311331.