737-800 flap position indicator.
For 737-800,when the flap position indicator is inop , how can you make the landing configuration? somebody said that using the red and black line in the PFD . but my question is :is the red and black speed limit indication accociated with current flap position or the flap handle indication? is that reliable to assure the flap is in position when the flap position indicator is inop?
THX to you all.