Narrative:

I am qualified on the medium large transport-a and medium large transport-B. The medium large transport-a can use flaps 1 degree or flaps 5 degree for takeoff. The medium large transport-B must use flaps 5 degree for takeoff. For the first 2 days of the trip we flew all medium large transport-a and used flaps 1 degree for takeoff. On the third leg of day three we switched aircraft to an medium large transport-B and you guessed it, we set flaps at 1 degree instead of 5 degree. We got a takeoff warning horn and immediately selected flaps 5 degree which then silenced the horn. Here's the problem: the same checklist is used for both aircraft. My recommendation is to put 5 degree where the dashed line is on the medium large transport-B checklist. We should have separate checklists for separate aircraft. Aircraft confign should not be left to memory. It should be on the checklist.

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Original NASA ASRS Text

Title: ACR MLG TKOF WARNING HORN ACTIVATED ON THROTTLE UP FOR TKOF DUE TO IMPROPER FLAP SETTING.

Narrative: I AM QUALIFIED ON THE MLG-A AND MLG-B. THE MLG-A CAN USE FLAPS 1 DEG OR FLAPS 5 DEG FOR TKOF. THE MLG-B MUST USE FLAPS 5 DEG FOR TKOF. FOR THE FIRST 2 DAYS OF THE TRIP WE FLEW ALL MLG-A AND USED FLAPS 1 DEG FOR TKOF. ON THE THIRD LEG OF DAY THREE WE SWITCHED ACFT TO AN MLG-B AND YOU GUESSED IT, WE SET FLAPS AT 1 DEG INSTEAD OF 5 DEG. WE GOT A TKOF WARNING HORN AND IMMEDIATELY SELECTED FLAPS 5 DEG WHICH THEN SILENCED THE HORN. HERE'S THE PROB: THE SAME CHKLIST IS USED FOR BOTH ACFT. MY RECOMMENDATION IS TO PUT 5 DEG WHERE THE DASHED LINE IS ON THE MLG-B CHKLIST. WE SHOULD HAVE SEPARATE CHKLISTS FOR SEPARATE ACFT. ACFT CONFIGN SHOULD NOT BE LEFT TO MEMORY. IT SHOULD BE ON THE CHKLIST.

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.