Poljot, you've asked this question 3 times now. Why do you think his DNA was on two masks?
The bleeds-off takeoff was normal procedure for Helios’ crews and was the case in the five previous incidents where air conditioning problems were reported in less than two months, since July 2005. The Chief Investigator has already released the plane’s recent history on that (Flight International 24 Aug.). I am not suggesting that this is a direct causal link to the crash, but it’s part of it.
If I understand the technical argument of the Greek and Cypriot skeptics correctly, an apparently insidious and increasingly recurrent electrical problem in the wiring and electronic interfaces of the ground-air sensor system, occurring in the first minutes of the climb, could have damaged the electronic card which triggers or cuts the T/O Warning Horn from the Aural Warning Generator (located above the captain’s left knee).
This would have the effect of retaining the T/O Warning Signal to the Aural Warning Module instead of canceling it when the aircraft is in the air. This would explain both an early sounding of the Cabin Altitude Horn without an actual pressurization failure, as well as the readiness of the crew to pull the CB of the T/O Aural Warning circuit. This would have rendered the pressurization warning system inoperative with a later decompression at 34,000 feet.