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Air France 447

Printed page 22. PDF page 24.

integrated standby instrument system (ISIS). The flight control law reconfigured from normal to alternate. The Flight Directors (FD) were not disconnected by the crew, but the crossbars disappeared. Note: Only the speeds displayed on the left side and on the
Open official document at PDF page 24Final Report: Accident on 1st June 2009 to the Airbus A330-203 registered F-GZCP operated by Air France flight AF 447

Air France 447

Printed page 90. PDF page 92.

systems. 1.16.3.3 Analysis of the flight control law The flight control law changed from normal to alternate at about 2 h 10 min 05. The alternate law was 2B and it did not change again thereafter. Due to the rejection
Open official document at PDF page 92Final Report: Accident on 1st June 2009 to the Airbus A330-203 registered F-GZCP operated by Air France flight AF 447

Air France 447

Printed page 7. PDF page 9.

the speed measurement system architecture 33 Figure 5: FCU display 37 Figure 6: PFD in normal law 39 Figure 7: PFD in alternate 2 law 39 Figure 8: Pitot probe diagram 40 Figure 9: Overview 41 Figure 10: Effect of
Open official document at PDF page 9Final Report: Accident on 1st June 2009 to the Airbus A330-203 registered F-GZCP operated by Air France flight AF 447

Air France 447

Printed page 37. PDF page 39.

called control laws. On the A330 in nominal operation, the control law is called the normal law. In the case where monitoring is triggered in the flight control system, it may be replaced by reconfiguration laws, known as the alternate
Open official document at PDF page 39Final Report: Accident on 1st June 2009 to the Airbus A330-203 registered F-GZCP operated by Air France flight AF 447

Air France 447

Printed page 174. PDF page 176.

to alternate law (which he only called out later): if he thought they were still in normal law, the warning could have seemed to be irrelevant. From the previous events studied (see 1.16.2 and 1.16.8.4) it is clear that almost
Open official document at PDF page 176Final Report: Accident on 1st June 2009 to the Airbus A330-203 registered F-GZCP operated by Air France flight AF 447

Air France 447

Printed page 186. PDF page 188.

computation and display of the limit speeds. The high and low speed protections that exist in normal law, and sometimes in a reduced manner (high and low speed stability) in alternate law, are lost. There is however no explicit indication,
Open official document at PDF page 188Final Report: Accident on 1st June 2009 to the Airbus A330-203 registered F-GZCP operated by Air France flight AF 447