As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) LEFT WITH ONE BLEED AIR SYSTEM UNDER MEL. ENROUTE, THE OTHER BLEED AIR SYSTEM FAILED. MTC SUGGESTED THAT THE AIRCRAFT SHOULD RETURN RESOLUTION REPLACED NAPRSOV AS PER AMM 36-11-03-000-801-A ON LEAK CHK FOUND LOWER SEALS LEAKING INSTALLED NEW SEALS. REPLACED HPSOV IAW AMM 36-11-01-000-801-A AND 36-11-01-400-801-A. OPS CHK SERV. LEAK CHK BOTH HPSOV AND NAPSOV CARRIED OUT NFF.