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Helios Airways 522

Printed page 62. PDF page 74.

descriptions of the survey revealed 21 incidents where aircrew felt their performance was impaired with the potential to compromise aircraft safety (e.g. aircrew who did not respond to direct questioning, increased number of mission-outcomes impacted by reduced cognitive per
Open final report at PDF page 74AAIASB 11/2006: Helios Airways HCY522

Helios Airways 522

Printed page 63. PDF page 75.

unconsciousness. Objective findings include: a) Special Senses. Peripheral and central vision are impaired and visual acuity is diminished. There is weakness and in coordination of the extra- ocular muscles and reduced range of visual accommodation. Touch and pain sense are
Open final report at PDF page 75AAIASB 11/2006: Helios Airways HCY522

Helios Airways 522

Printed page 106. PDF page 118.

recognize the initial symptoms of hypoxia. It is therefore possible that judgment may be impaired to such an extent that corrective actions associated with dealing with an emergency situation may lead to incorrect or inappropriate response which could endanger the
Open final report at PDF page 118AAIASB 11/2006: Helios Airways HCY522

Helios Airways 522

Printed page 111. PDF page 123.

normal. However, when the aircraft crossed FL250, the pilot's speech gradually became impaired until he deteriorated towards unconsciousness and unresponsive to air traffic control instructions. No sounds of pilot or passenger activity in the aircraft were detected for t
Open final report at PDF page 123AAIASB 11/2006: Helios Airways HCY522

Helios Airways 522

Printed page 157. PDF page 169.

by the FDR, was not pressed. The performance of the cabin crew member was very likely impaired by the hypoxic and stressful conditions. 5. Three of the four portable oxygen cylinders on board the aircraft had most likely been used.
Open final report at PDF page 169AAIASB 11/2006: Helios Airways HCY522

Helios Airways 522

Printed page 132. PDF page 134.

information is received which indicates that the operating efficiency of the aircraft has been impaired to the extent that a forced landing is likely. These phases are intended for the search and rescue services, which must take appropriate measures, and
Open official document at PDF page 134Final Report: Accident on 1st June 2009 to the Airbus A330-203 registered F-GZCP operated by Air France flight AF 447