B737 Undifferentiated or Other Model
Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Security; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Other / Unknown
General Flight Cancelled / Delayed; General Maintenance Action
Human Factors
I was working swing shift when Aircraft X was getting ready to depart from ZZZ Gate X. I got called for a C/B (Circuit Breaker) tripped in the aft galley. I was present when the same aircraft arrived in the morning; with galley C/B tripped when it left ZZZ1 and then in flight to ZZZ; as I stated in the two previous TSAP's; our workgroup; spent hours troubleshooting the faults that seemed 737 related; after never reaching any definitive faults and many conversations between us and also with Maintenance Control; then we noticed the routes and crew were too close to be a coincidence; we then noticed one particular crew member that was linked to several flights and this was the 4th time I personally saw him; in the approximate location of the faulted galley; I notified my Supervisor and Lead and also briefed two managers from in-flight services. I have tracked Aircraft X since and noted deferred oven was Op checked and signed off as no faults found in ZZZ2 three days later; also no other galley ovens or coffee makers C/B's have tripped since today.
Reported C/B's (Circuit Breakers) tripping in the FWD and AFT galleys; several flights with a pattern of happening after power transfer at departure; after hours of research AMM's (Airplane Maintenance Manuals); troubleshooting manuals and avionics group conversations; we determined the only common thread on multiple flights; the same flight attendant that a few of us noticed several times with the same faults in the same general area of the aircraft; I personally saw him on 4 flights that were either taken out of service or delayed; sometimes for two hours or more. This particular flight from ZZZ1 to ZZZ; had C/B's tripped at departure; Op's checked and signed off then in flight the same thing again; we met the plane; briefed the Captain; brought my Supervisor and Lead and In-flight Supervisor to confront him; nothing happened as he walked away through the terminal; without interference.
Maintenance Technician reports that cabin crew member is making false write-ups for non-existent aircraft discrepancies.