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An air carrier B737 flight crew takes off on an alternate runway without completely checking their performance data and find, after takeoff, that they were over the gross weight for that runway.
| Attributes | |
| ACN | 367893 |
| Time | |
| Date | 199705 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : clt |
| State Reference | NC |
| 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 | B737-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | climbout : takeoff ground : preflight ground other : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 215 flight time total : 12500 flight time type : 90 |
| ASRS Report | 367893 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 6000 flight time type : 2000 |
| ASRS Report | 367890 |
| Events | |
| Anomaly | non adherence : published procedure non adherence : far |
| 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:
During taxi for takeoff we received our weight and balance data via the ACARS system. We accepted a takeoff clearance for runway 5 and made a normal takeoff. After takeoff we found that we were 100 pounds overweight for runway 5. Human factors: ground control asked for a quick decision on the use of runway 5 to expedite our departure. ACARS display of weight and balance data requires care in interpretation. It is easy to get rows and columns displaced and see an acceptable weight and runway combination when it does not exist. Several pages of data may have to be gone through. Supplemental information from acn 367890: after takeoff we found that our ACARS data showed we were not legal for that runway. Checking the onboard performance manuals showed that we were at least 100 pounds overweight for a full power takeoff for that runway. With the de-rated power we used, we were more overweight than that.
Original NASA ASRS Text
Title: AN ACR B737 FLC TAKES OFF ON AN ALTERNATE RWY WITHOUT COMPLETELY CHKING THEIR PERFORMANCE DATA AND FIND, AFTER TKOF, THAT THEY WERE OVER THE GROSS WT FOR THAT RWY.
Narrative: DURING TAXI FOR TKOF WE RECEIVED OUR WT AND BAL DATA VIA THE ACARS SYS. WE ACCEPTED A TKOF CLRNC FOR RWY 5 AND MADE A NORMAL TKOF. AFTER TKOF WE FOUND THAT WE WERE 100 LBS OVERWT FOR RWY 5. HUMAN FACTORS: GND CTL ASKED FOR A QUICK DECISION ON THE USE OF RWY 5 TO EXPEDITE OUR DEP. ACARS DISPLAY OF WT AND BAL DATA REQUIRES CARE IN INTERP. IT IS EASY TO GET ROWS AND COLUMNS DISPLACED AND SEE AN ACCEPTABLE WT AND RWY COMBINATION WHEN IT DOES NOT EXIST. SEVERAL PAGES OF DATA MAY HAVE TO BE GONE THROUGH. SUPPLEMENTAL INFO FROM ACN 367890: AFTER TKOF WE FOUND THAT OUR ACARS DATA SHOWED WE WERE NOT LEGAL FOR THAT RWY. CHKING THE ONBOARD PERFORMANCE MANUALS SHOWED THAT WE WERE AT LEAST 100 LBS OVERWT FOR A FULL PWR TKOF FOR THAT RWY. WITH THE DE-RATED PWR WE USED, WE WERE MORE OVERWT THAN THAT.
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.