A md-83 takeoff roll was excessive and during climb with flaps and slats retracted a clean climb spe...

Narrative:

Normally used runway xxr was closed but we were able to pull up departure numbers for xxl the shorter south side runway. We also had a slight tailwind departing in the southwest direction. Based on our closeout we were legal for departure but runway limited and somewhat near our balanced field limit. To add a margin of safety I elected to also do a packs off takeoff. The takeoff roll seemed long but we reached rotate with approximate 2;000 ft remaining and broke ground with approximate 1;000 feet remaining. Then during climb with the flaps and slats retracted we had to roll the autothrottle air speed up to 260 KIAS before the alpha speed warning extinguished in the thrust window of the FMA. 260 KIAS was 13 KTS above the expected 247 KIAS clean min maneuver speed set from our departure plan tps. After cruise altitude level off (lowed than flight plan because of gross weight concerns) I called dispatch and ordered an arrival off load audit. We flew the arrival into our filed destination using a higher than shown gross weight speeds to add a margin of safety not knowing exactly heavy we were. Possible overweight takeoff and possible overweight landing at ZZZ.

Original NASA ASRS Text

Title: A MD-83 takeoff roll was excessive and during climb with flaps and slats retracted a clean climb speed of 263 KTS was maintained to extinguish the ALPA SPD warning. Excessive takeoff weight suspected.

Narrative: Normally used Runway XXR was closed but we were able to pull up departure numbers for XXL the shorter south side runway. We also had a slight tailwind departing in the southwest direction. Based on our closeout we were legal for departure but runway limited and somewhat near our balanced field limit. To add a margin of safety I elected to also do a packs off takeoff. The takeoff roll seemed long but we reached rotate with approximate 2;000 FT remaining and broke ground with approximate 1;000 feet remaining. Then during climb with the flaps and slats retracted we had to roll the autothrottle air speed up to 260 KIAS before the alpha speed warning extinguished in the thrust window of the FMA. 260 KIAS was 13 KTS above the expected 247 KIAS clean min maneuver speed set from our departure plan TPS. After cruise altitude level off (lowed than flight plan because of gross weight concerns) I called Dispatch and ordered an arrival off load audit. We flew the arrival into our filed destination using a higher than shown gross weight speeds to add a margin of safety not knowing exactly heavy we were. Possible overweight takeoff and possible overweight landing at ZZZ.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1141436
Time
Date	201401
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	MD-83
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Not Flying First Officer
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Procedural Weight And Balance Deviation - Speed All Types

A md-83 takeoff roll was excessive and during climb with flaps and slats retracted a clean climb speed of 263 KTS was maintained to extinguish the alpa speed warning. Excessive takeoff weight suspected.