As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI FROM THE GATE THE RT PACK OVERHEATED AND THE AUTO FAILED WITH AN ASSOCIATED METALLIC SMELL IN THE COCKPIT. CREW FOLLOWED CFM PROCEDURES AND DESELECTED RT PACK. CREW CONTINUED TO RUN LT PACK FROM ALL BLEED SOURCES AND SMELL IN COCKPIT DID NOT CONTINUE. MX PLACED RT PACK ON MEL AFTER VERIFICATION OF LT PACK OPERABILITY AND ABSENCE OF SMELL IN COCKPIT. REMOVED AND REPLACED RT ACM ON 2/6/2010.