Narrative:

I picked up the flight in gso. Upon checking the release and the carry over log, I noted that the anti-skid was inoperative and was properly MEL'ed. The first officer and I checked the appropriate chart for takeoff and reduced the takeoff weight as was appropriate. We then checked the runway length required for landing. We came up with 3926 ft off the 'actual landing length required chart.' the runway to be used was 6006 ft at trenton, nj (ttn). With flaps 40 degrees and without anti- skid, we were well within range-- we thought! Apparently the dispatcher thought the same thing and used the same chart we did. However, after landing uneventfully in ttn, we discovered the chart we should have used was the 'field length required for dispatch' chart. Our weight on landing was 86200 pounds. For flaps 40 degrees and anti-skid inoperative, the field length required should have been 6526 ft -- over 500 ft longer than what was actually used. The lesson learned is make sure you're using the correct chart because mistakes can easily be made with charts of similar names.

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Original NASA ASRS Text

Title: FLC AND DISPATCHER OF A B737 USED THE WRONG RWY CHART WHEN COMPUTING THE LNDG DISTANCE REQUIRED WITH ANTI-SKID INOP RESULTING IN USING A RWY OF INSUFFICIENT LENGTH.

Narrative: I PICKED UP THE FLT IN GSO. UPON CHKING THE RELEASE AND THE CARRY OVER LOG, I NOTED THAT THE ANTI-SKID WAS INOP AND WAS PROPERLY MEL'ED. THE FO AND I CHKED THE APPROPRIATE CHART FOR TKOF AND REDUCED THE TKOF WT AS WAS APPROPRIATE. WE THEN CHKED THE RWY LENGTH REQUIRED FOR LNDG. WE CAME UP WITH 3926 FT OFF THE 'ACTUAL LNDG LENGTH REQUIRED CHART.' THE RWY TO BE USED WAS 6006 FT AT TRENTON, NJ (TTN). WITH FLAPS 40 DEGS AND WITHOUT ANTI- SKID, WE WERE WELL WITHIN RANGE-- WE THOUGHT! APPARENTLY THE DISPATCHER THOUGHT THE SAME THING AND USED THE SAME CHART WE DID. HOWEVER, AFTER LNDG UNEVENTFULLY IN TTN, WE DISCOVERED THE CHART WE SHOULD HAVE USED WAS THE 'FIELD LENGTH REQUIRED FOR DISPATCH' CHART. OUR WT ON LNDG WAS 86200 LBS. FOR FLAPS 40 DEGS AND ANTI-SKID INOP, THE FIELD LENGTH REQUIRED SHOULD HAVE BEEN 6526 FT -- OVER 500 FT LONGER THAN WHAT WAS ACTUALLY USED. THE LESSON LEARNED IS MAKE SURE YOU'RE USING THE CORRECT CHART BECAUSE MISTAKES CAN EASILY BE MADE WITH CHARTS OF SIMILAR NAMES.

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.