Commercial Fixed Wing
Flight Crew Last 90 Days 220; Flight Crew Total 4800; Flight Crew Type 2200
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural MEL / CDL; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Overcame Equipment Problem; General Maintenance Action
Human Factors
Over night aircraft was written up as brake system 2 malfunction. Maintenance Release indicated Brake System 2 Circuit Breaker pulled and System 2 inoperative. System 1 good and crew to perform alternate brake check. After completing check; Captain noticed status page indicated System 1 inoperative. Upon further investigation noticed System 1 Brake Circuit Breaker pulled instead of 2. The Captain called Maintenance Controller and verified incorrect brake system inoperative. Crew pulled System 2 Brake Circuit Breaker and reset System 1 as per Maintenance Control instructions. Captain's attention to detail prevented us from departing with both brake systems inoperative.
It is unclear if there was a malfunction on Brake System 2 since there appears to have been no flight deck message. If the alternate brake test was successful; then in the worst case; the aircraft would have been released with only alternate brake systems available.