B737-800
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Total 19000
Workload; Training / Qualification; Time Pressure; Distraction
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Returned To Gate
Aircraft; Human Factors; Procedure
Aircraft had 16 MEL; [Maintenance Discrepancy] and NEF (Non-Essential Equipment Furnishing) items in logbook which I had to verify; plus a sign off on brakes being completed. I made sure all the proper placards were in place. Was told the exterior inspection was complete and no anomalies. Pushed back started engines and asked Ramp for taxi to [the runway]. They said contact Maintenance. We were advised to come back to gate for book related issue. Maintenance Supervisor asked me to follow him and showed me the tire and the brakes on the aircraft left. The outboard brake line was not hooked up and the tire I was informed had 107 PSI.
I had done the preflight walk around on the aircraft. The brake line on the Number 1 brake was resting on top of the connection cap and it had not been tightened down and I did not see it in the darkness. The Number 1 tire also appeared to be under inflated.
B737-800 flight crew reported that critical maintenance items were not completed resulting in a return to the gate after pushback.