What was found
ASH 6296 PHX, RETURNED TO GATE DUE TO 10TH STAGE BLEED VALVE WILL NOT CLOSE AND APU OVERTEMPS. MX REMOVED AND REPLACED AIR CONTROL PANEL AND 10TH STAGE VALVE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ASH 6296 PHX, RETURNED TO GATE DUE TO 10TH STAGE BLEED VALVE WILL NOT CLOSE AND APU OVERTEMPS. MX REMOVED AND REPLACED AIR CONTROL PANEL AND 10TH STAGE VALVE.