As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ASCENT OUT OF DFW, NOTICED LOUD RUMBLE FROM RIGHT PACK, PACK WAS SHUT DOWN. AIRCRAFT WOULD NOT MAINTAIN CABIN PRESSURE WITH LEFT PACK. REMOVED AND REPLACED RIGHT 35 DEGREE CONTROL IAW 21-60-00, REPAIRED AND SECURED CONNECTOR TO LEFT PACK AIR CYCLE MACHINE IAW 21-50-00. (M)