<< >> NASA ASRS Report 1284535, August 2015

During the takeoff roll the first officer's airspeed lagged behind the captain's so the flight returned to the departure airport. The aircraft had been washed; the pitot system inspected by the international relief officer; but yellow tape was found inside the first officer's pitot tube upon inspection after landing.

Attributes
ACN	1284535
Time
Date	201508
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Component
Aircraft Component	Pitot-Static System
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 112 Flight Crew Total 10002 Flight Crew Type 112
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 204 Flight Crew Total 7465 Flight Crew Type 4959
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy Deviation - Speed All Types

Narrative:

I was pilot flying; and the captain made the 100 knots call and noticed my airspeed indicator was lagging significantly. We confirmed the airspeed with the standby instruments and determined the captains airspeed indicator was reliable. After rotation and gear retraction I transferred aircraft control to the captain and he continued the takeoff and we cleaned up the aircraft. First officer airspeed indicator was 20-30 knots slower than the captains. The captain continued flying and the international relief officer and I ran the airspeed unreliable checklist and we returned to ZZZ and the captain made an overweight landing. We had the fire trucks check the brakes and they applied fans to cool them. We were towed to the gate.

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Original NASA ASRS Text

Title: During the takeoff roll the First Officer's airspeed lagged behind the Captain's so the flight returned to the departure airport. The aircraft had been washed; the pitot system inspected by the IRO; but yellow tape was found inside the First Officer's pitot tube upon inspection after landing.

Narrative: I was pilot flying; and the Captain made the 100 knots call and noticed my airspeed indicator was lagging significantly. We confirmed the airspeed with the standby instruments and determined the Captains airspeed indicator was reliable. After rotation and gear retraction I transferred aircraft control to the captain and he continued the takeoff and we cleaned up the aircraft. FO airspeed indicator was 20-30 knots slower than the captains. The captain continued flying and the IRO and I ran the Airspeed Unreliable checklist and we returned to ZZZ and the captain made an overweight landing. We had the fire trucks check the brakes and they applied fans to cool them. We were towed to the gate.

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.