The flight crew of an Airwork Boeing 737 freighter observed a 340-ft discrepancy in altitude readings between the captain’s and first officer’s display screens after departure from Perth, Western Australia, as well as small differences in airspeed and Mach number readings.
Meltdown
Pitot covers melted during a ground run with pitot heat on, leaving residue on a 737’s pitot probes, the ATSB says.