Malaysian Air Said to Opt Out of Boeing Jet-Data Service

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Malaysian Airline System Bhd. opted out of a Boeing Co. service to collect real-time performance data from jets like Flight 370 for use in planning maintenance, according to a person familiar with the matter.

The carrier harvests the same information itself, said the person, who asked not to be identified because Flight 370 is under investigation. The search for the missing Boeing 777-200 entered a fifth day today, leaving investigators baffled as to what was happening on board the plane when radar contact was lost less than an hour into a March 8 flight to Beijing.