Date: 201707
Local time of day: 0601-1200
Location: ZZZ.Airport, US
Flight conditions: VMC
Light: Daylight
Aircraft: B737-800
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Takeoff / Launch
ATC / advisory: Tower ZZZ
Aircraft component: Airspeed Indicator
Component problem: Malfunctioning
Reporter organization: Air Carrier
Reporter function: Captain; Pilot Not Flying
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Second reporter function: First Officer; Pilot Flying
Anomaly: Aircraft Equipment Problem Less Severe
Detector: Person Flight Crew
When detected: In-flight
Result: Flight Crew Rejected Takeoff; Flight Crew Took Evasive Action
Contributing factors: Aircraft
Primary problem: Aircraft

Narrative: During takeoff roll (First Officer (FO) flying); Captain's airspeed came alive moving past 45 knots. At 60 knots indicated on standby indicator; I checked and called appropriate takeoff power was set. Glanced at FO`s airspeed and that was now passing 70 knots. When I looked back at Captain`s airspeed indicator getting ready to make my '80 knots cross check callout' I noticed mine had stopped at about 55 knots. I called out we had an airspeed discrepancy indication. At this moment we both called out aloud and verified both Primary Flight Displays (PFDs) displayed an amber 'IAS DISAGREE' light. I elected to reject takeoff as the Ground Speed indicated 91 knots when the auto brakes were actually applied. Released auto brakes about 60 knots and taxied clear of the runway. Requested Airport Rescue and Fire Fighting (ARFF) to inspect us as a precaution prior to going to gate. Referenced QRH for high speed abort while waiting. Put passengers at ease with a short PA; then taxied to the gate. Made appropriate logbook entries. Notified dispatch after getting back to the gate. It wasn't until about 80 knots that the error was caught since the faulty indicator did start to indicate appropriately. Proper procedures were followed checking standby and co-pilots instruments for correct operation while checking for proper engine power being set. An indicator that started to work correctly and then failed was caught in a timely manner. This event could only be avoided prior to 80 knots if the Captain's faulty airspeed indicator never started to indicate an increase in airspeed.


Second narrative: I was Pilot Flying on takeoff roll. From my perspective; the early portion of the takeoff roll proceeded normally. I saw 80 knots on my PFD; and did not hear the Captain (CA) call '80 knots.' Then I saw an 'IAS Disagree' warning on my PFD. I looked at the CA's PFD and saw 54 knots; and the 'IAS disagree' warning. I stated 'Reject' to the CA; as he was retarding the throttles. My airspeed indicator read just over 90 knots as I felt the auto brakes engage. Shortly afterward the CA disengaged the auto brakes. I heard tower cancel takeoff clearance of the aircraft behind us. I then reported the aborted takeoff to tower. We cleared the runway and stopped on the taxiway. We had ARFF inspect our brakes; checked the brake cooling requirements in our QRH; and then returned to the gate. We notified local company operations; and dispatch.


Synopsis: B737-800 flight crew reported a takeoff due to a failure of the Captain's airspeed indicator as well as an 'IAS Disagree' warning message on both Pilots Primary Flight Displays.