Helios Airways Flight 522 (August 14, 2005)

Date: August 14, 2005
Passengers: 115
Crew: 6
Fatalities: 121
Cause: Loss of cabin pressurisation, leading to incapacitation of crew. Plane flew on autopilot until fuel exhaustion and engine flameout, leading to crash.


Legend:
CAM     Cockpit area microphone or sound source
RDO     Radio transmission from accident aircraft
LAR		Larnaca ATC
CV		Computerised voice
MVD		MVD 3007
BC		Bulgarian Charter 7867
-1      Voice identified as flight attendant
*       Unintelligible word
@       Non-pertinent word
#       Expletive
( )     Questionable insertion
(( ))   Editorial insertion
...     Pause
Times are expressed in UTC.


---


0848:31		MVD		Nicosia MVD three zero zero seven requesting descent
			CAM		((sound of two chimes))

0848:38		LAR		MVD three zero zero seven request descent

0848:48		MVD		Descending to flight level one one zero MVD three zero zero seven, descent

0848:51		CAM		((sound of two chimes))

0849:11		CAM		((sound of continuous chime for 19s))

0849:32		CAM		((sound of click))

0849:41		CAM		((sound of movement in cockpit))

0850:06		CAM		((sound, either of seat adjustment or oxygen mask removal))

0850:09		CAM		((sound of oxygen flow during donning of mask for 9s))

0850:32		CV		Bank angle, bank angle

0850:37		CV		Bank angle, bank angle

0850:42		CAM		((unknown sound))

0850:45		CAM		((sound of altitude alert warning))

0850:52		CAM		((sound, possibly air noise))

0850:58		CAM		((sound of altitude alert warning))

0851:04		CAM-1	*

0851:19		CAM		((sound of breathing in oxygen mask for 10s))

0851:48		CAM		((sound, possibly whistle))

0851:49		CV		Bank angle, bank angle

0851:50		CAM		((sound of stick shaker))

0851:56		CAM		((sound of altitude alert warning))

0852:41		CAM		((sound of click))

0854:04		LAR/BC	Two four two good day Bulgarian Charter seven eight six seven ((not sure who said this))

0854:18		RDO-1	Mayday, mayday, mayday, Helios Airways flight five two two Athens *

0854:33		CAM		((sound of overspeed warning for 76s))

0855:05		RDO-1	Mayday ((very weakly))

0855:09		RDO-1	Mayday ((very weakly))

0855:27		CV		Traffic, traffic

0855:49		CAM		((sound of overspeed warning))

0856:08		CAM		((sound of overspeed warning))

0857:10		CAM		((sound of overspeed warning))

0857:24		CAM		((sound of altitude alert warning))

0857:28		CAM		((sound of altitude alert warning))

0857:44		CAM		((sound of altitude alert warning))

0858:20		CAM		((sound of oxygen rush or breathing))

0858:27		CAM		((sound of altitude alert warning))

0858:53		CAM		((sound of altitude alert warning))

0859:03		CAM		((sound of altitude warning horn stops))

0859:06		CAM		((sound of seven chimes similar to flight attendant call))

0859:15		CAM		((unknown sound))

0859:18		CAM		((sound of oxygen flow))

0859:22		CAM		((sound of click))

0859:26		CAM		((sound similar to inflation/deflation of oxygen mask))

0859:39		CAM		((sound similar to inflation/deflation of oxygen mask))

0859:43		CAM		((sound similar to inflation/deflation of oxygen mask))

0859:47				((end of recording))