Narrative:

I was the first officer and pilot monitoring. We were approaching the equal time point when we received a level 2 ECAM indication 'C/B (circuit breaker) tripped on ovhd (overhead) panel.' we accomplished the non-normal methodology and discovered that the crew oxygen supply C/B was tripped on the overhead panel (ha 1). There were no ECAM steps to accomplish. I read the QRH C/B tripped guidance to the captain and the captain elected not to reset the C/B. Additionally; the oxygen pressure on the door/oxy system page indicated amber xs. I discovered no additional guidance after reviewing the ECAM supplemental manual and word searches in both A320 oms and FM 1. I assumed pilot flying duties and the captain assumed pilot monitoring duties. The captain contacted maintenance control through dispatch. Additionally; the captain donned his mask and was able to breathe normally. I donned my mask on two separate occasions and was able to breathe normally with the mask regulator set to 100% (I did not attempt other settings). Each time my mask harness inflated and deflated normally. The captain informed me of his conversation with maintenance control and stated that we should have normal use of the masks with the C/B in the tripped position. The captain and I discussed resetting the C/B; diverting and/or descending to a lower altitude. We decided against this because we had no other non-normals; believed we were operating within the intent of the QRH; inflight and pre-flight checks on the crew oxygen (bottle psi normal on the ground) and weather. We continued the flight to [our destination] with no additional indications.

Google
 

Original NASA ASRS Text

Title: A321 flight crew reported that they received a Level 2 ECAM indication 'C/B Tripped on OVHD Panel.' The circuit breaker was for the crew oxygen system.

Narrative: I was the First Officer and Pilot Monitoring. We were approaching the Equal Time Point when we received a Level 2 ECAM indication 'C/B (circuit breaker) Tripped on OVHD (Overhead) Panel.' We accomplished the non-normal methodology and discovered that the Crew Oxygen Supply C/B was tripped on the overhead panel (HA 1). There were no ECAM steps to accomplish. I read the QRH C/B tripped guidance to the Captain and the Captain elected not to reset the C/B. Additionally; the oxygen pressure on the Door/OXY system page indicated amber Xs. I discovered no additional guidance after reviewing the ECAM supplemental manual and word searches in both A320 OMs and FM 1. I assumed Pilot Flying duties and the Captain assumed Pilot Monitoring duties. The Captain contacted Maintenance Control through Dispatch. Additionally; the Captain donned his mask and was able to breathe normally. I donned my mask on two separate occasions and was able to breathe normally with the mask regulator set to 100% (I did not attempt other settings). Each time my mask harness inflated and deflated normally. The Captain informed me of his conversation with Maintenance Control and stated that we should have normal use of the masks with the C/B in the tripped position. The Captain and I discussed resetting the C/B; diverting and/or descending to a lower altitude. We decided against this because we had no other non-normals; believed we were operating within the intent of the QRH; inflight and pre-flight checks on the crew oxygen (bottle psi normal on the ground) and weather. We continued the flight to [our destination] with no additional indications.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.