Flight crew reported that while intercepting the localizer; the MCP and FMA went blank. The approach...

Attributes
ACN	1697152
Time
Date	201910
Local Time Of Day	1801-2400
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Component
Aircraft Component	MCP
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 228 Flight Crew Total 1510 Flight Crew Type 1510
Person 2
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 132 Flight Crew Total 520 Flight Crew Type 520
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Track / Heading All Types

Narrative:

During our arrival to ZZZ from ZZZ1 we had the wrong runway transition for ILS runway xxl. I realized it when we started to turn south bound and approach control asked us if we had the wrong transition loaded. Immediately we asked for vectors and were given vectors for runway xxl. While we were intercepting the localizer our FMA and MCP went blank and were unable to intercept the localizer for xxl. I instructed ca to hand fly the visual to xxl; since it was VMC. We rolled out on final slightly right of localizer course; which tower asked if we were established and we said correcting; since we were just little right of course. We then verified the runway and continue to land visually to runway xxl. I made several attempts prior to glide slope intercept to reset MCP to no-avail. Raw data approach was uneventfully flown by captain to normal landing. We continued to gate; and during my after landing flow recycled fds and MCP reset; we both noticed that the FMA returned to normal values after we landed; it was not blank anymore; with normal indications.

Original NASA ASRS Text

Title: Flight Crew reported that while intercepting the localizer; the MCP and FMA went blank. The approach was flown to a normal landing in visual conditions.

Narrative: During our arrival to ZZZ from ZZZ1 we had the wrong runway transition for ILS Runway XXL. I realized it when we started to turn south bound and Approach Control asked us if we had the wrong transition loaded. Immediately we asked for vectors and were given vectors for Runway XXL. While we were intercepting the localizer our FMA and MCP went blank and were unable to intercept the LOC for XXL. I instructed CA to hand fly the visual to XXL; since it was VMC. We rolled out on final slightly right of localizer course; which tower asked if we were established and we said correcting; since we were just little right of course. We then verified the runway and continue to land visually to Runway XXL. I made several attempts prior to glide slope intercept to reset MCP to no-avail. Raw data approach was uneventfully flown by Captain to normal landing. We continued to gate; and during my after landing flow recycled FDs and MCP RESET; we both noticed that the FMA returned to normal values after we landed; it was not blank anymore; with normal 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.

Flight crew reported that while intercepting the localizer; the MCP and FMA went blank. The approach was flown to a normal landing in visual conditions.