Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Flight Crew Last 90 Days 164; Flight Crew Total 20000; Flight Crew Type 9411
Aircraft Equipment Problem Less Severe
Flight Crew Rejected Takeoff; General Work Refused; General Flight Cancelled / Delayed; General Release Refused / Aircraft Not Accepted
Aircraft
RTO (Rejected Takeoff) around 88 knots due to IAS disagree on both Captains and FO (First Officer) side. FO airspeed lagged about 15 knots and Capt's AS (Airspeed) began accelerating rapidly. Unable to determine correct V1; Vr and V2 speeds accurately. Vendor maintenance with coordination from ZZZ Maintenance indicated all tests and visual inspections of pitot and static ports were clear and tests indicated no fault. I refused the aircraft to be signed off for flying by Maintenance. [Maintenance Control] sent a team of mechanics and discovered with in depth inspection debris and ash in pitot static system and defective ADM (Air Data Module.)
B737 Captain reported rejected takeoff due to airspeed anomalies.