MD88 flight crew experiences windshear alert at V1 along with CAWS alerts. Windshear escape maneuver...

Attributes
ACN	775039
Time
Date	200802
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Environment
Flight Conditions	VMC
Weather Elements	Windshear
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	MD-88
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 137 flight time total : 3641 flight time type : 678
ASRS Report	775039
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : diverted to another airport
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

On departure roll at V1 we had a 'windshear' warning (increasing tailwind). We elected to continue the takeoff; the captain pushed the throttles up; and we performed the windshear recovery. We accelerated past vr and rotated at V2. We reported a PIREP of increasing tailwind windshear warning to the tower. After the windshear warning we experienced continuous; multiple CAWS warnings. CAWS is the central aural warning system on the MD88. We then noticed a CAWS fail message on the oap (overhead annunciator panel). The 'windshear' warning is supposed to be inhibited on takeoff roll. Every CAWS warning was annunciating continuously as we climbed out. While coordinating with maintenance on disengaging the CAWS (and potential engine over-boost during windshear warning); we elected to return to land. We coordinated 'expedited handling' and a return on the arrival to land visually. We left both engines running at the gate so they could inspect them. We landed without incident and taxied back to gate. Maintenance personnel confirmed the engine over-boost and a complete CAWS failure. Communication was very difficult during the flight due to the extremely loud CAWS failure. It was hard to talk to ATC; the rest of the crew; and our maintenance. Because the CAWS aural annunciations were random and repetitive; it was very distracting.

Original NASA ASRS Text

Title: MD88 FLT CREW EXPERIENCES WINDSHEAR ALERT AT V1 ALONG WITH CAWS ALERTS. WINDSHEAR ESCAPE MANEUVER IS FLOWN BUT CAWS CANNOT BE SILENCED. RETURN TO LAND.

Narrative: ON DEP ROLL AT V1 WE HAD A 'WINDSHEAR' WARNING (INCREASING TAILWIND). WE ELECTED TO CONTINUE THE TKOF; THE CAPT PUSHED THE THROTTLES UP; AND WE PERFORMED THE WINDSHEAR RECOVERY. WE ACCELERATED PAST VR AND ROTATED AT V2. WE RPTED A PIREP OF INCREASING TAILWIND WINDSHEAR WARNING TO THE TWR. AFTER THE WINDSHEAR WARNING WE EXPERIENCED CONTINUOUS; MULTIPLE CAWS WARNINGS. CAWS IS THE CENTRAL AURAL WARNING SYS ON THE MD88. WE THEN NOTICED A CAWS FAIL MESSAGE ON THE OAP (OVERHEAD ANNUNCIATOR PANEL). THE 'WINDSHEAR' WARNING IS SUPPOSED TO BE INHIBITED ON TKOF ROLL. EVERY CAWS WARNING WAS ANNUNCIATING CONTINUOUSLY AS WE CLBED OUT. WHILE COORDINATING WITH MAINT ON DISENGAGING THE CAWS (AND POTENTIAL ENG OVER-BOOST DURING WINDSHEAR WARNING); WE ELECTED TO RETURN TO LAND. WE COORDINATED 'EXPEDITED HANDLING' AND A RETURN ON THE ARR TO LAND VISUALLY. WE LEFT BOTH ENGS RUNNING AT THE GATE SO THEY COULD INSPECT THEM. WE LANDED WITHOUT INCIDENT AND TAXIED BACK TO GATE. MAINT PERSONNEL CONFIRMED THE ENG OVER-BOOST AND A COMPLETE CAWS FAILURE. COM WAS VERY DIFFICULT DURING THE FLT DUE TO THE EXTREMELY LOUD CAWS FAILURE. IT WAS HARD TO TALK TO ATC; THE REST OF THE CREW; AND OUR MAINT. BECAUSE THE CAWS AURAL ANNUNCIATIONS WERE RANDOM AND REPETITIVE; IT WAS VERY DISTRACTING.

Data retrieved from NASA's ASRS site as of May 2009 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.

MD88 flight crew experiences windshear alert at V1 along with CAWS alerts. Windshear escape maneuver is flown but CAWS cannot be silenced. Return to land.