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B737-300 first officer reports failure to note decrease in number of passenger on board when computing takeoff data.
| Attributes | |
| ACN | 722333 |
| Time | |
| Date | 200612 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dca.airport |
| State Reference | DC |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | ground : takeoff roll ground : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 120 flight time total : 19000 flight time type : 4000 |
| ASRS Report | 722333 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | non adherence : company policies non adherence : far |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft Company |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Weight and balance data received via ACARS on taxi-out for takeoff showed passenger count of 81. Flight attendants had reported count of 76 passenger. The error of 81 versus 76 actual was not noticed until after takeoff. We had flight attendants recount and they came up with 76 again. We took off with more conservative data; but still; I should have caught the difference of 5 passenger. (The allowable error is +/-2 passenger.) sure it was hectic and busy at dca that day; but increased diligence on my part could have caught the error earlier.
Original NASA ASRS Text
Title: B737-300 FO RPTS FAILURE TO NOTE DECREASE IN NUMBER OF PAX ON BOARD WHEN COMPUTING TKOF DATA.
Narrative: WT AND BAL DATA RECEIVED VIA ACARS ON TAXI-OUT FOR TKOF SHOWED PAX COUNT OF 81. FLT ATTENDANTS HAD RPTED COUNT OF 76 PAX. THE ERROR OF 81 VERSUS 76 ACTUAL WAS NOT NOTICED UNTIL AFTER TKOF. WE HAD FLT ATTENDANTS RECOUNT AND THEY CAME UP WITH 76 AGAIN. WE TOOK OFF WITH MORE CONSERVATIVE DATA; BUT STILL; I SHOULD HAVE CAUGHT THE DIFFERENCE OF 5 PAX. (THE ALLOWABLE ERROR IS +/-2 PAX.) SURE IT WAS HECTIC AND BUSY AT DCA THAT DAY; BUT INCREASED DILIGENCE ON MY PART COULD HAVE CAUGHT THE ERROR EARLIER.
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.