A little more on the reporting system on the UPS plane:
UPS spokesman Mike Mangeot confirmed that the crashed plane was equipped with an airline health maintenance system, Boeing's name for the transmission system. He declined to comment directly on the crash or what information the company received from the plane before the accident.
AHM systems help "self-diagnose" problems in flight and alert the airline before landing so that maintenance workers are ready to do repairs and parts are on hand. The systems aren't standard on Boeing planes, but the company has been installing them on 747-400s for customers who request them for about five years, said Boeing spokesman Jim Proulx.
Among the data transmitted ahead of the Dubai crash, according to people familiar with the investigation, was an alert about a serious problem in the cargo compartment near the starboard wing.
The Canadian Press: AP sources: Fire aboard UPS plane that crashed in Dubai may have started in cargo compartment