DECLAN WALSH NOUR YOUSSEF KAREEM FAHIM
n an eerie coincidence, the EgyptAir jetliner that plunged into the Mediter ranean on Thursday was once the target of political vandals who wrote in Ara bio on its underside, "We will bring this plane down"
Three EgyptAir security officials said the threatening graffiti, which appeared about two years ago, had been the work of aviation workers at Cairo Airport. Playing on the phonetic similarity between the last two letters in the plane's registration SU-GCC, and the surname of Egypt's presi dent, Abdel-Fattah el-Sissi, some workers also wrote"traitor" and"murderer.
The officials said the graffiti had been linked to the domestic Egyptian political situation at the time rather than to a mili tant threat.
Similar graffiti against Mr el Sissi, a former general, was scrawled across Cairo after the military ousted the elected presi dent, Mohammed Morsi, in 2013
Since then, the airline has put into effect a variety ofnew security measures in response to Egypt's political turmoil, jihadi violence and other aviation disasters like the crash of a Russian plane that killed 224 people in October.
EgyptAir has fired employees for their political leanings, stepped up crew searches and added extra unarmed in-flight security guards. Three such guards died in Thurs day's crash of Flight 804.
Whether those moves were sufficient remained an open question on Saturday as experts pored over data emitted by the plane in its final minutes for clues as to what had brought it down.
The French air accident investigation authority confirmed that the data showed that several smoke alarms had been activated while the plane plunged toward the sea.
But they cautioned that the signals, sent by a monitoring system on board the Airbus A320 jetliner, did not offer enough informa- tion to conclude what had caused the crash.
"These are not messages that enable us to interpret anything," said Sébastien Barthe, spokesman for France's Bureau of Investigations and Analysis.
"If there is smoke, it means that there is potentially a fire somewhere, but it doesn't tell us where the fire is, and it doesn't help us establish whether it is something malevolent or something technical.
In an audio message released on Saturday, Abu Muhammad al-Adnani, spokes- man of the Islamic State group and head of a unit dedicated to external attacks, denounced the US-led military campaign against the group but did not mention the EgyptAir crash.
EgyptAir's security procedures last came under scrutiny in March when a passenger on a domestic flight pretended to be wearing an explosive vest and forced the plane to land in Cyprus. The crisis was resolved within hours when the man, later deter mined to be psychologically troubled, surrendered.
Egyptian authorities were quick to post surveillance videos that they said showed he had been searched before boarding the flight. Among the 66 people on Thursday's flight from Charles de Gaulle Airport in Paris were three EgyptAir in-flight security personnel one more than the normal team of two for reasons that were not entirely clear.
EgyptAir security guards differ in sev eral respects from the undercover air mar shals who travel on American airlines. The Egyptian guards are unarmed and wear an understated uniform consisting of a dark blazer and a white shirt. When called on, they help crew members deal with unruly passengers. They come from a wide variety of backgrounds and earn a moderate wage of about $400(14,276 baht) a month.
Normally, one security officer sits in the first economy row, behind business class, and the other is at the rear of the aircraft two members of an EgyptAir crew said During stopovers at foreign airports, the security officers are usually responsible for searching the workers who clean the plane and checking the credentials of all crew members or employees who board. They do not monitor the baggage handlers who load the plane's hold.