B747 crew had a large discrepancy in reported passenger count versus actual count.

Attributes
ACN	470710
Time
Date	200004
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : eham.airport
State Reference	FO
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : takeoff ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 220 flight time total : 12000 flight time type : 400
ASRS Report	470710
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa other flight crewb
Supplementary
Problem Areas	Company
Primary Problem	Company

Narrative:

Takeoff with wrong weight data, no adverse flight characteristics. Well within all safety parameters. Received wrong passenger count (305 instead of 405). Was no safety factor, but could be for a different aircraft or different conditions. Discovered and corrected after departure. Looked like it could have been a typo error.

Original NASA ASRS Text

Title: B747 CREW HAD A LARGE DISCREPANCY IN RPTED PAX COUNT VERSUS ACTUAL COUNT.

Narrative: TKOF WITH WRONG WT DATA, NO ADVERSE FLT CHARACTERISTICS. WELL WITHIN ALL SAFETY PARAMETERS. RECEIVED WRONG PAX COUNT (305 INSTEAD OF 405). WAS NO SAFETY FACTOR, BUT COULD BE FOR A DIFFERENT ACFT OR DIFFERENT CONDITIONS. DISCOVERED AND CORRECTED AFTER DEP. LOOKED LIKE IT COULD HAVE BEEN A TYPO ERROR.

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.