AD propsed to end JT15D flameouts

September 1, 2008
Safety, Regulations

The FAA and Pratt & Whitney Canada believe they have found the cause of at least three high-altitude, dual-engine flameouts on Pratt & Whitney Canada JT15D-5-powered airplanes operating in certain meteorological conditions. In a proposed Airworthiness Directive issued on August 22, the FAA said its investigation into these incidents revealed that the engine’s fuel control hydromechanical unit (HMU) P3 servo can be exposed to excessive moisture and freezing, subsequently causing the flameouts.

To preclude P3 servo freezing, P&WC has issued a JT15D alert service bulletin to reroute compressor delivery air to the HMU and improve moisture separation. The FAA’s proposed AD would mandate the incorporation of the SB on affected JT15D-5 engines within 200 flight hours after the effective date of this AD or by December 31, whichever occurs first.

The JT15D-5 turbofan powers Cessna 500-series Citations, Mitsubishi Diamonds and Beechjet 400s/Hawker 400XPs.

Back

Gates ready to help with safety issues November 17, 2008 It is an old but still valid saying that “safety is no accident,” although to Gates Aviation Consulting (Stand No. 227) the subject is rather... [more]
Elite Jets First in Region To Gain IBAC OK November 17, 2008 Dubai-base Elite Jets has become the first company in the Middle East to obtain the coveted IS-BAO certification from the International Business... [more]
Tempus in-flight medical kit upgrade with video capability November 16, 2008 RDT (Stand No. 542) has introduced the new Tempus IC version of its in-flight medical emergency response system. The new model is significantly... [more]
NTSB Meeting To Address Helo EMS Safety November 11, 2008 Due to a high number of fatal aeromedical accidents over the past year, the NTSB yesterday announced it will hold a public hearing on the safety... [more]
Van Nuys Noisy Phaseout Could Bolster BUR Traffic November 11, 2008 A draft environmental impact report for Van Nuys (Calif.) Airport’s “Noisier Aircraft Phaseout” project suggests that most aircraft might divert... [more]