MD80 flight crew take off with the incorrect weight and balance information.

Attributes
ACN	731404
Time
Date	200703
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mmmx.airport
State Reference	FO
Altitude	agl single value : 0
Environment
Flight Conditions	IMC
Light	Dawn
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	731404
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	731405
Events
Anomaly	non adherence : far non adherence : company policies
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Company Flight Crew Human Performance
Primary Problem	Ambiguous

Narrative:

After takeoff; dispatch sent ACARS message that our passenger count on closeout was possibly incorrect. We conducted a physical count and it was higher than the load closeout. Dispatcher stated we were over runway limited weight because of 5 extra passenger. We could only go on the numbers on the closeout and they were wrong.

Original NASA ASRS Text

Title: MD80 FLT CREW TAKE OFF WITH THE INCORRECT WT AND BALANCE INFO.

Narrative: AFTER TKOF; DISPATCH SENT ACARS MESSAGE THAT OUR PAX COUNT ON CLOSEOUT WAS POSSIBLY INCORRECT. WE CONDUCTED A PHYSICAL COUNT AND IT WAS HIGHER THAN THE LOAD CLOSEOUT. DISPATCHER STATED WE WERE OVER RWY LIMITED WT BECAUSE OF 5 EXTRA PAX. WE COULD ONLY GO ON THE NUMBERS ON THE CLOSEOUT AND THEY WERE WRONG.

Data retrieved from NASA's ASRS site as of January 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.