As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE FLIGHT CREW REPORTED THAT THEY HAD NO HIGH BLEED ON EITHER ENGINE. MAINTENANCE INVESTIGATION REVEALED THAT THE NR 1 ENGINE HIGH PRESSURE >65 PSI SWITCH WAS OUT OF TOLERANCE AND REPLACED IT. THE AIRCRAFT WAS RETURNED TO SERVICE. THE NR 1 & 2 ENGINE HIGH BLEED SWITCHES OPERATE IN SERIES THROUGH A COMMON DELAY RELAY, THUS FAILURE OF ONE SWITCH WILL INHIBIT SWITCHING ON BOTH ENGINES.