B737 Undifferentiated or Other Model
Flight Crew Last 90 Days 180; Flight Crew Total 6000; Flight Crew Type 300
Distraction; Human-Machine Interface; Training / Qualification
Aircraft Equipment Problem Critical
General None Reported / Taken
Procedure; Aircraft
Leg one of a four-day trip; Captains takeoff. At approximately 100 knots; the Master Caution Light with ENG on the copilot 'six pack' illuminated. I called out the engine warning; verified that both engines were operating normally on their engine instruments and the Captain stated 'continue.' There was no adverse yaw involved. This ENG light went out a short time later. In conjunction with the Master Caution Light and again at approximately 100 knots; on my airspeed indicator I saw an 'IAS disagree.' I looked at the standby airspeed indicator and saw that it matched mine; but did not announce this indication. I also verified that the pitot heat was ON. Sometime later before V1; the Captain said 'I have no airspeed indicator.' Rotation was normal; although the autothrottles had kicked off at some point. Gear retraction was normal and upon initial flap retraction; the Captain's stall limiter activated. Again; I verified my airspeed indicator with the STBY airspeed indicator and they were both in agreement. The Captain's airspeed indicator read zero. We continued the climb and the stick shaker ceased at approximately 250 knots. I believe when the Captains airspeed indicator returned to normal at this point. He was flying off the STBY until then. The aircraft operated normally for the remainder of the flight. We wrote both issues up on the way into our destination.
A B737 Captain's airspeed indicator failed during the takeoff roll as IAS disagree alerted along with the ENG and the Master Caution lights; but the takeoff continued and the airspeed returned to normal at 250 knots in the climb.