What was found
AT FL 350, NOTICED BURNING SMELL, FEW MINUTES LATER, LEVEL 3 AIR MANIFOLD 2 FAILED, FOLLOWED QRH & RETURNED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AT FL 350, NOTICED BURNING SMELL, FEW MINUTES LATER, LEVEL 3 AIR MANIFOLD 2 FAILED, FOLLOWED QRH & RETURNED.