What was found
LEFT ENG BLEED AIR VALVE WILL NOT OPEN. DUCT PRESSURE ON LEFT SIDE IS ZERO. ADVANCED ENG POWER AND STILL NO HELP. FOUND PRESSURE REGULATING VALVE TO BE FAULTY. REPLACED PRV, RAN ENGINE OP CHECKED GOOD. AC OK FOR SERVICE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LEFT ENG BLEED AIR VALVE WILL NOT OPEN. DUCT PRESSURE ON LEFT SIDE IS ZERO. ADVANCED ENG POWER AND STILL NO HELP. FOUND PRESSURE REGULATING VALVE TO BE FAULTY. REPLACED PRV, RAN ENGINE OP CHECKED GOOD. AC OK FOR SERVICE.