NTSB Identification: FTW93IA118.
The docket is stored on NTSB microfiche number 50862.
Nonscheduled 14 CFR operation of CANADA 3000 AIRLINE LTD
Incident occurred Wednesday, April 07, 1993 in HOUSTON, TX
Probable Cause Approval Date: 12/03/1993
Aircraft: BOEING 757-200, registration: CFOOA
Injuries: 40 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

THE TRANSPORT AIRPLANE ENCOUNTERED SEVERE TURBULENCE WHILE IN CRUISE AT FL420. THE CREW REACTED TO RAPIDLY DECAYING AIRSPEED BY LOWERING THE NOSE, INDUCING NEGATIVE 'G' FORCES. THE INTEGRATED DRIVE GENERATORS WERE TRIPPED OFF BY THE NEGATIVE 'G' MANEUVER. THE CREW COMPLETED THE EMERGENCY PROCEDURES FOR COMPLETE ELECTRICAL FAILURE WHILE FLYING THE AIRPLANE ON THE STANDBY FLIGHT INSTRUMENTS UNTIL ELECTRICAL POWER WAS REESTABLISHED FROM THE APU, EVENTUALLY REINSTATING BOTH GENERATORS

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

ENCOUNTER WITH TURBULENCE. A FACTOR WAS THE LOSS OF ELECTRICAL POWER

Full narrative available

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