What was found
A/C RETURNED TO FIELD WITH LEFT ENGINE EEC AND BLEED PROBLEMS. REPLACED CIRCUIT BREAKER AND WIRE. PER BOEING ANALYSIS THE SCREW HOLDING THE WIRES IN THE CIRCUIT BREAKER WAS CROSS THREADED AND WAS NOT HOLDING THE WIRES SECURE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
A/C RETURNED TO FIELD WITH LEFT ENGINE EEC AND BLEED PROBLEMS. REPLACED CIRCUIT BREAKER AND WIRE. PER BOEING ANALYSIS THE SCREW HOLDING THE WIRES IN THE CIRCUIT BREAKER WAS CROSS THREADED AND WAS NOT HOLDING THE WIRES SECURE.