Airworthiness Directives; Pratt & Whitney PW4090 and PW4090-3 Turbofan Engines
The FAA proposes to adopt a new airworthiness directive (AD) for Pratt & Whitney (PW) PW4090 and PW4090-3 turbofan engines with front turbine hub, part number (P/N) 53L601, installed. This proposed AD would reduce the published life limit of those front turbine hubs from 12,000 cycles-since-new (CSN) to 9,370 CSN. This proposed AD would also remove from service those front turbine hubs using a drawdown schedule. This proposed AD results from PW updating the low-cycle- fatigue (LCF) life analysis for front turbine hubs, P/N 53L601. We are proposing this AD to prevent an uncontained failure of the front turbine hub, resulting in an in-flight engine shutdown and possible damage to the airplane.
Establishment, Modification and Revocation of VOR Federal Airways; East Central United States
This action modifies VOR Federal Airway, V-133 over the East Central United States in support of the Midwest Airspace Enhancement Plan (MASE). The FAA is taking this action to enhance safety and to improve the efficient use of the navigable airspace assigned to the Chicago, Cleveland, and Indianapolis Air Route Traffic Control Centers (ARTCC).
Revision of Jet Routes J-29 and J-101; South Central United States
This action revises Jet Routes J-29 and J-101 over the South Central United States in support of the Houston Area Air Traffic System Project. This allows for more effective utilization of airspace and enhances the management of aircraft operations over the Houston terminal area.