Maintenance Cited in Triple-Engine Out
RB. 211 In-flight Shutdown Experience—The in-flight shutdown (IFSD) rate for RB. 211 engines is monitored daily and reported to the FAA monthly in the Eastern Airlines Fleet Reliability Report. As a result of two Eastern Airlines incidents of fan shaft failures (May 25, 1981, and Sept. 22, 1981) and a similar Delta Air Lines incident on Aug. 10, 1981, flightcrews were told to immediately shut down RB. 211 engines at the first indication of engine vibration on the airborne vibration monitoring system (AVM).