Air carrier flight crew reported the BUF Runway 5 ILS was intermittently unreliable.
Synopsis
Air carrier flight crew reported the BUF Runway 5 ILS was intermittently unreliable.
Narrative
During the ILS Runway 5 into BUF; we noticed the Morse code identifier was hard to hear; but we had positive localizer and glideslope indications. During intercept we decided to disengage the autopilot because it was NOTAM'd to not be flown coupled but we noticed we were losing localizer indication intermittently. We struggled to maintain lateral course and when we were about to report it to the Approach Controller; he noticed we were off course and he offered us to break off and come back and try it again. We accepted it and performed a soft go-around. We notified the FA and passengers.On the second attempt; we also lost localizer indication intermittently and brought it up to the controller and in conjunction with him; we decided to attempt the ILS one more time but this time to do it from outside the (IF) ZOBSO. In that second attempt; during the soft go-around; since we were hand-flying and got task saturated during the climb; we missed our assigned altitude of 3000 feet for a few hundred feet and during that correction we were also given a lower altitude of 2300 feet; and during descent we were late to perform our soft go-around profile and when doing so we noticed our speed was at around 221 when we retracted the flaps from 22 to 9 degrees. We completed the checklists and with the high workload also thinking about a Plan B; we decided as a crew to back up the ILS with the RNAV 5 since the ceilings at that moment were just above MDA. The aircraft was landed safely.Due to high workload; we didn't contact Dispatch until at the gate.Suggestion: Next time; perform the soft go-around in a timely manner.
Second reporter narrative
[Report narrative contained no additional information.]
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.