Commercial Fixed Wing
Maintenance Airframe; Maintenance Powerplant
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
General Flight Cancelled / Delayed; General Maintenance Action
Company Policy; Aircraft; Procedure
Received a gate call for Maintenance massage on ECAM C/B (Circuit Breakers) tripped rear panel N-R. Cleared massage once but it came back after 10 minutes. Troubleshooting per Maintenance Manual 31-XX-XX-XXX-XXX-X; there was no actual C/B that was open and therefor had to pull aircraft out of service for further Troubleshooting. This aircraft was released back into service by a vendor for modifications to power ports. Stop sending our aircraft to outside venders.
Technician reported removing an aircraft from service because of a circuit breaker that would not remain set.