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Captain of an air carrier medium large transport failed to make the required verbal announcement to the ground tug driver that he had turned off the pressurization packs in preparation for high altitude takeoff at a higher weight than first given.
| Attributes | |
| ACN | 420430 |
| Time | |
| Date | 199811 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : mex |
| State Reference | FO |
| 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 | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : preflight ground other : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 200 flight time total : 12500 flight time type : 2700 |
| ASRS Report | 420430 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial |
| Events | |
| Anomaly | non adherence other other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
After calling for a new takeoff performance sheet (reference to weight and balance) on taxi out, it was discovered that a packs off takeoff was called for. The packs were turned off just before brake release and my response on the mechanical checklist 'packs off,' may have been overlooked. Better verbal review would help. A poor night of sleep was a contributing factor to the problem.
Original NASA ASRS Text
Title: CAPT OF AN ACR MLG FAILED TO MAKE THE REQUIRED VERBAL ANNOUNCEMENT TO THE GND TUG DRIVER THAT HE HAD TURNED OFF THE PRESSURIZATION PACKS IN PREPARATION FOR HIGH ALT TKOF AT A HIGHER WT THAN FIRST GIVEN.
Narrative: AFTER CALLING FOR A NEW TKOF PERFORMANCE SHEET (REF TO WT AND BAL) ON TAXI OUT, IT WAS DISCOVERED THAT A PACKS OFF TKOF WAS CALLED FOR. THE PACKS WERE TURNED OFF JUST BEFORE BRAKE RELEASE AND MY RESPONSE ON THE MECHANICAL CHKLIST 'PACKS OFF,' MAY HAVE BEEN OVERLOOKED. BETTER VERBAL REVIEW WOULD HELP. A POOR NIGHT OF SLEEP WAS A CONTRIBUTING FACTOR TO THE PROB.
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.