 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Commuter light transport takes off with aircraft out of proper cg limits due to miscalculation by first officer during weight and balance computations from latest weight manifest and passenger information count.
| Attributes | |
| ACN | 191816 |
| Time | |
| Date | 199110 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : iah |
| State Reference | TX |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | climbout : takeoff ground : preflight ground other : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 9600 |
| ASRS Report | 191816 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 3000 |
| ASRS Report | 192075 |
| Events | |
| Anomaly | non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Flight departed iah for efd on 10/91. Because of late changing px and bay counts, the weight and balance was recalculated 3 different times requiring the original form to be discarded and a new one reaccomplished. The wrong min/maximum column was used to calculate the allowable aft cargo load resulting in an excess of 42 pounds in the cargo compartment. This caused an out of cg condition that should have been corrected by blocking an aft seat. This situation occurred because of numerous late passenger, bag count changes, requiring a number of recalculations. Not accepting further changes after the F/T is closed out would help alleviate errors of this kind. Returning the weight and balance calculations to dispatch and taking it out of the cramped cockpit would also help.
Original NASA ASRS Text
Title: COMMUTER LTT TAKES OFF WITH ACFT OUT OF PROPER CG LIMITS DUE TO MISCALCULATION BY FO DURING WT AND BAL COMPUTATIONS FROM LATEST WT MANIFEST AND PAX INFO COUNT.
Narrative: FLT DEPARTED IAH FOR EFD ON 10/91. BECAUSE OF LATE CHANGING PX AND BAY COUNTS, THE WT AND BAL WAS RECALCULATED 3 DIFFERENT TIMES REQUIRING THE ORIGINAL FORM TO BE DISCARDED AND A NEW ONE REACCOMPLISHED. THE WRONG MIN/MAX COLUMN WAS USED TO CALCULATE THE ALLOWABLE AFT CARGO LOAD RESULTING IN AN EXCESS OF 42 POUNDS IN THE CARGO COMPARTMENT. THIS CAUSED AN OUT OF CG CONDITION THAT SHOULD HAVE BEEN CORRECTED BY BLOCKING AN AFT SEAT. THIS SITUATION OCCURRED BECAUSE OF NUMEROUS LATE PAX, BAG COUNT CHANGES, REQUIRING A NUMBER OF RECALCULATIONS. NOT ACCEPTING FURTHER CHANGES AFTER THE F/T IS CLOSED OUT WOULD HELP ALLEVIATE ERRORS OF THIS KIND. RETURNING THE WT AND BAL CALCULATIONS TO DISPATCH AND TAKING IT OUT OF THE CRAMPED COCKPIT WOULD ALSO HELP.
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.