<< >> NASA ASRS Report 855870, October 2009

A B737-800 crew reported that the captain's airspeed; altitude and vertical speed disappeared from his pfd during the takeoff roll. The first officer's flight director lost commands intermittently. An emergency was declared with a return to land.

Attributes
ACN	855870
Time
Date	200910
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Component
Aircraft Component	Navigational Equipment and Processing
Person 1
Function	Pilot Not Flying Captain
Person 2
Function	Pilot Flying First Officer
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

During takeoff; captain's asi/altitude/vsi indication failed at approximately 110 KIAS. After takeoff; attempts to restore indications unsuccessful. Declare emergency with ATC; returned for landing. Landed overweight at approximately 151;000 pounds.

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Original NASA ASRS Text

Title: A B737-800 crew reported that the Captain's Airspeed; Altitude and Vertical Speed disappeared from his PFD during the takeoff roll. The First Officer's flight director lost commands intermittently. An emergency was declared with a return to land.

Narrative: During takeoff; Captain's ASI/ALT/VSI indication failed at approximately 110 KIAS. After takeoff; attempts to restore indications unsuccessful. Declare emergency with ATC; returned for landing. Landed overweight at approximately 151;000 LBS.

Data retrieved from NASA's ASRS site as of April 2012 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.