EMB-170 Captain reported a Slat Fail EICAS message on approach. The fault was cleared during trouble shooting; but the Captain neglected to enter a discrepancy in the log book for maintenance.

Narrative

DATE. Reposition flight from ZZZ to ZZZ1; taking a good plane and 3 MX (Maintenance) personnel to a broken plane in ZZZ1. The flight was normal and uneventful until the approach. We were around 2;000 ft.; I think; and we were cleared the visual to Runway XX. I; the Captain; was Pilot Flying. I asked for Flaps 1 and we quickly received a caution EICAS (Engine Indicating and Crew Alerting System) saying Slat Fail. We immediately asked to discontinue the approach and for delay vectors; which ATC granted. We said no assistance needed at this time. The FO (First Officer) then pulled out the QRH and ran the slat fail procedure. After returning the flaps to the previous position; the message cleared. We then talked about a plan if it were to happen again. We set up for the approach to Flaps 2; I believe; with no issue; before asking for the ILS XX. ATC gave us a vector to intercept and cleared us for the approach; which ended with a normal approach and landing.After parking; I spoke with the MX personnel that we had on board. I told them what happened and that everything operated as normal after the QRH procedure. They talked among themselves and said they believed there was no need for a write up since nothing seemed wrong and they really had nothing to go off of if everything was now operating normally. It was brought to my attention on DATE1 that that was incorrect; and that a write up should absolutely have been made. I knew I was unsure of their decision; and I should have known better. I have not really been in a situation where something was wrong; then not wrong; so I was not confident on what to do. I will keep this knowledge for future events.