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Air carrier heavy transport altitude deviation excursion from cruise altitude so abruptly that 2 cabin attendants were injured.
| Attributes | |
| ACN | 193184 |
| Time | |
| Date | 199110 |
| Day | Sat |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | atc facility : sa |
| State Reference | NS |
| Altitude | msl bound lower : 33000 msl bound upper : 34500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : czqm |
| Operator | common carrier : air carrier |
| Make Model Name | Heavy Transport, Low Wing, 4 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : atlantic enroute : other oceanic enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 3600 flight time type : 1200 |
| ASRS Report | 193184 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter other non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : exited adverse environment |
| Consequence | other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
At cruise level with no warning encountered sudden windshear which resulted in a large airspeed increase requiring a thrust reduction to idle and 1500 ft climb to avoid exceeding barber pole and vmmo. Resulting G load caused minor injuries to 2 flight attendants. Although the proper company report was filed, the flight crew did not enter the encounter in the aircraft maintenance log. This was likely due to the fatigue induced by the long back-side-of-the-clock duty day. Duty started early local time and ended 10 1/2 hours later.
Original NASA ASRS Text
Title: ACR HVT ALTDEV EXCURSION FROM CRUISE ALT SO ABRUPTLY THAT 2 CABIN ATTENDANTS WERE INJURED.
Narrative: AT CRUISE LEVEL WITH NO WARNING ENCOUNTERED SUDDEN WINDSHEAR WHICH RESULTED IN A LARGE AIRSPD INCREASE REQUIRING A THRUST REDUCTION TO IDLE AND 1500 FT CLB TO AVOID EXCEEDING BARBER POLE AND VMMO. RESULTING G LOAD CAUSED MINOR INJURIES TO 2 FLT ATTENDANTS. ALTHOUGH THE PROPER COMPANY RPT WAS FILED, THE FLT CREW DID NOT ENTER THE ENCOUNTER IN THE ACFT MAINT LOG. THIS WAS LIKELY DUE TO THE FATIGUE INDUCED BY THE LONG BACK-SIDE-OF-THE-CLOCK DUTY DAY. DUTY STARTED EARLY LCL TIME AND ENDED 10 1/2 HRS LATER.
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.