 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B757 flight crew has inaccurate takeoff performance data after load closeout. After revised data is received via radio they departed with an improper V1 speed for a downwind takeoff at san, ca.
| Attributes | |
| ACN | 599377 |
| Time | |
| Date | 200311 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : san.airport |
| State Reference | CA |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : takeoff roll |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| ASRS Report | 599377 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : less severe inflight encounter : weather non adherence : far non adherence : published procedure non adherence : company policies other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Supplementary | |
| Problem Areas | Company Aircraft Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
ACARS inoperative. Got load closeout, new tps, because overweight for paper copy. First spent 10 mins trying to raise san operations. Finally able to get tps via radio. Tower even tried. Rainy morning. Tower cleared us for takeoff and gave the winds. Captain, flying, realized it was a tailwind and changed to maximum power. Then after takeoff, realized we should have reduced v-spds according to the manual computations. None of our speeds had loaded because our ACARS was out -- no communication. This should have reduced V1 by 10 KTS and could have been critical given an abort situation, especially at san airport. I had never gotten a tps over the radio before and with trying to raise operations, etc, the v-spd reduction didn't enter my head. A lesson learned for the next time it happens.
Original NASA ASRS Text
Title: A B757 FLT CREW HAS INACCURATE TKOF PERFORMANCE DATA AFTER LOAD CLOSEOUT. AFTER REVISED DATA IS RECEIVED VIA RADIO THEY DEPARTED WITH AN IMPROPER V1 SPD FOR A DOWNWIND TKOF AT SAN, CA.
Narrative: ACARS INOP. GOT LOAD CLOSEOUT, NEW TPS, BECAUSE OVERWT FOR PAPER COPY. FIRST SPENT 10 MINS TRYING TO RAISE SAN OPS. FINALLY ABLE TO GET TPS VIA RADIO. TWR EVEN TRIED. RAINY MORNING. TWR CLRED US FOR TKOF AND GAVE THE WINDS. CAPT, FLYING, REALIZED IT WAS A TAILWIND AND CHANGED TO MAX PWR. THEN AFTER TKOF, REALIZED WE SHOULD HAVE REDUCED V-SPDS ACCORDING TO THE MANUAL COMPUTATIONS. NONE OF OUR SPDS HAD LOADED BECAUSE OUR ACARS WAS OUT -- NO COM. THIS SHOULD HAVE REDUCED V1 BY 10 KTS AND COULD HAVE BEEN CRITICAL GIVEN AN ABORT SIT, ESPECIALLY AT SAN ARPT. I HAD NEVER GOTTEN A TPS OVER THE RADIO BEFORE AND WITH TRYING TO RAISE OPS, ETC, THE V-SPD REDUCTION DIDN'T ENTER MY HEAD. A LESSON LEARNED FOR THE NEXT TIME IT HAPPENS.
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.