As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 2944 - DURING PREFLIGHT THE CREW REPORTED A BURNING ODOR AND BLEED LEAK NR 2 INDICATION. MAINTENANCE INSPECTED THE AIRCRAFT AND REMOVED AND REPLACED A BLOWN O-RING IN THE CARGO COMPARTMENT, LEAK AND OPERATIONALLY CHECKED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (A)