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G-ONEE: electrical failures and unreliable airspeed

Printed page label not indexed. PDF page 3.

recognised that they would descend through icing conditions and began briefing for potential unreliable airspeed using the QRH but were interrupted by noticing the cabin altitude indication had automatically appeared on the upper EICAS display, showing it increasing through 8,6
Open official document at PDF page 3AAIB final report: G-ONEE

G-ONEE: electrical failures and unreliable airspeed

Printed page label not indexed. PDF page 5.

indication, if possible, or otherwise to continue the flight using the ‘Flight With Unreliable Airspeed' tables contained within the ‘Performance Inflight' chapter of the QRH. These tables, located in a separate section of the QRH, use aircraft weight and pressure
Open official document at PDF page 5AAIB final report: G-ONEE

G-ONEE: electrical failures and unreliable airspeed

Printed page label not indexed. PDF page 9.

AAIB Bulletin: G-ONEE AAIB-29853 Figure 5 Unreliable airspeed event The data for the unreliable airspeed event (Figure 5) shows that throughout this period the right autopilot was engaged, the autothrottle was disengaged, the p
Open official document at PDF page 9AAIB final report: G-ONEE

G-ONEE: electrical failures and unreliable airspeed

Printed page label not indexed. PDF page 10.

pre-icing speed. The speed brakes were not deployed during the overspeed event. The QRH unreliable airspeed pitch and descent rate reference values, shown in Figure 5, are those that were determined by the flight crew from the ‘Flight With Unreliable
Open official document at PDF page 10AAIB final report: G-ONEE

G-ONEE: electrical failures and unreliable airspeed

Printed page label not indexed. PDF page 29.

communication and continuous reassessment. Accident to Airbus A330 (F-GZCP) involving unreliable airspeed In 2009, there was a fatal accident to an Airbus A330 (F-GZCP), operated by Air France, over the Atlantic Ocean. The investigation by the French Safety Investigation
Open official document at PDF page 29AAIB final report: G-ONEE

G-ONEE: electrical failures and unreliable airspeed

Printed page label not indexed. PDF page 37.

pressed the GCS or BTS for AC Bus 1, it would not have had any effect. Cause of the unreliable airspeed The loss of AC Bus 1 and 4 resulted in the loss of heating to all four pitot-static probes
Open official document at PDF page 37AAIB final report: G-ONEE