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First officer reported pfd failure on approach resulting in a non functional airspeed indication on the first officer's primary flight display.
| Attributes | |
| ACN | 1734308 |
| Time | |
| Date | 202003 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | PFD |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
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 speed intv to slow down and lvl chg to descend the aircraft. The IAS/mach window did not open when I selected speed intv. I believe I also tried selecting lvl chg and/or V/south 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.
Original NASA ASRS Text
Title: First Officer reported PFD failure on approach resulting in a non functional airspeed indication on the First Officer's Primary Flight Display.
Narrative: 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.
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.