<< >> NASA ASRS Report 395777, February 1998

An air carrier MD80 flight crew got a stall warning when the 'slat disagree' light illuminated after rotation during the takeoff.

Attributes
ACN	395777
Time
Date	199802
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : dfw
State Reference	TX
Altitude	agl bound lower : 400 agl bound upper : 400
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tower : dfw
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	395777
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Reference a feb publication on safety concerning super 80 stick shaker on takeoff. Although no possible violation exists, this debrief is being submitted for safety/trend analysis. On departure, just after rotation, slat disagree light illuminated followed within 1 second by the stick shaker. First officer reduced pitch attitude while I applied maximum power. Stick shaker continued during climb out. At approximately 400 ft afl slat disagree light went out and shaker stopped. Light came back on a few seconds later with shaker on again. Once slats were retracted, light stayed out and no further problems were noted. As stated earlier, after reading safety reports I am concerned about a possible problem with S80 fleet. Had light illuminated a few seconds earlier, V1, some crew members may have decided to abort at very high speed, with the resulting complications.

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Original NASA ASRS Text

Title: AN ACR MD80 FLC GOT A STALL WARNING WHEN THE 'SLAT DISAGREE' LIGHT ILLUMINATED AFTER ROTATION DURING THE TKOF.

Narrative: REF A FEB PUB ON SAFETY CONCERNING SUPER 80 STICK SHAKER ON TKOF. ALTHOUGH NO POSSIBLE VIOLATION EXISTS, THIS DEBRIEF IS BEING SUBMITTED FOR SAFETY/TREND ANALYSIS. ON DEP, JUST AFTER ROTATION, SLAT DISAGREE LIGHT ILLUMINATED FOLLOWED WITHIN 1 SECOND BY THE STICK SHAKER. FO REDUCED PITCH ATTITUDE WHILE I APPLIED MAX PWR. STICK SHAKER CONTINUED DURING CLBOUT. AT APPROX 400 FT AFL SLAT DISAGREE LIGHT WENT OUT AND SHAKER STOPPED. LIGHT CAME BACK ON A FEW SECONDS LATER WITH SHAKER ON AGAIN. ONCE SLATS WERE RETRACTED, LIGHT STAYED OUT AND NO FURTHER PROBS WERE NOTED. AS STATED EARLIER, AFTER READING SAFETY RPTS I AM CONCERNED ABOUT A POSSIBLE PROB WITH S80 FLEET. HAD LIGHT ILLUMINATED A FEW SECONDS EARLIER, V1, SOME CREW MEMBERS MAY HAVE DECIDED TO ABORT AT VERY HIGH SPD, WITH THE RESULTING COMPLICATIONS.

Data retrieved from NASA's ASRS site as of July 2007 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.