Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew FLC Overrode Automation; Flight Crew Took Evasive Action
Aircraft
Just prior to ZZZZZ intersection ATC cleared us down to 4;000 (from 5;000) and slow to approach speed. We were currently at flaps 5 and 210 kts. I planned to use SPD INTV to slow down and LVL CHG to descend the aircraft. The IAS/MACH window did not open when I selected SPD INTV. I believe I also tried selecting LVL CHG and/or V/S mode to open the IAS/MACH window. When nothing worked I disconnected the autopilot and auto throttles and started a manual descent. The IAS/MACH windows opened shortly after with 210 KTS in the window. Captain set Vref+5 using IAS/MACH selector. PFD1 bug moved to Vref+5 while PFD 2 was stuck at 210KT. We configured the aircraft using airspeed from PFD1. Once we were configured the Captain transferred his PDF display to my side (control panel; both on 1). I was now flying the speed set in the IAS/MACH window; Vref+5. On short final Captain stated '5 kts slow' as per his HUD. PFD was showing Vref+5; same as set in the IAS/MACH window. I immediately increased speed 5kts to maintained Vref+10 on my PFD. We landed with no further issues.
First Officer reported PFD failure on approach resulting in a non functional airspeed indication on the First Officer's Primary Flight Display.