FAA Issues AD on P&WC Turboshaft Engines

The FAA has adopted a new airworthiness directive, effective March 26, for certain serial number Pratt & Whitney Canada PW206B/B2/C and PW207C/D/D1/D2/E turboshaft engines. The AD was prompted by the discovery that certain power turbine (PT) disks were made to heat codes that may not achieve the maximum in-service life. This AD requires re-identification of the PT disk to a part number (P/N) with a lower life limit. The company said it is issuing this AD to prevent possible uncontained PT disk failure and loss of control of the helicopter.