EXCLUSIVE REPORT : EgyptAir plane had no technical problems before takeoff

In this picture posted Saturday, May 21, 2016, on the official Facebook page of the Egyptian Armed Forces spokesman shows a life vest from EgyptAir flight 804

The EgyptAir flight that crashed over the Mediterranean last week displayed no signs of technical issues before departing from Charles de Gaulle Airport in Paris, according to a technical log signed by the plane's pilot before takeoff.

The Aircraft Technical Log was also signed by an EgyptAir inspector at the French airport after he conducted a routine examination, according to a copy of the document published on Tuesday.

EgyptAir flight MS804 disappeared from radar screens in the early hours of Thursday, 19 May before it crashed into the Mediterranean, with all 66 passengers and crew on board presumed dead.

Al-Ahram also published a document from the Aircraft Communication Addressing and Reporting System (ACARS), which showed that the doomed Airbus 320 jet transmitted "11 electronic messages" starting 2109 GMT on 18 May.

The first two messages indicated that the engines were functioning properly.

The third message, whichwas sent at 0026 GMT on 19 May around four minutes before the plane vanished from radar, indicated a rise in the temperature of the cockpit's right-side window. The plane then continued to send messages for three more minutes before dropping off radar screens.

Earlier this week, Aviation Herald, a prominent Austria-based website specialising in air accidents, said in a report that the jet sent seven alarm messages minutes before disappearing indicating smoke on board, both in the lavatory as well as in the aircraft's avionics area underneath the cockpit.

Officials say this data is insufficient on its own to unravel the mystery of the crash.

Egypt and France have deployed vessels in the Mediterranean in search of the plane's black box recorders, which could be critical in identifying the cause of the disaster.

The depth of the water in the area where the plane is believed to have crashed presents a challenge to search efforts.