PW blade issue spurs A320neo engine de-pairing order

Operators of certain Airbus A320neo-family aircraft are being instructed to de-pair Pratt & Whitney PW1100G engines over low-pressure turbine blade damage. EASA says the engine manufacturer has developed an improved third-stage disc turbine blade. Examination of damaged blades has shown that they have “limited” damage tolerance, says EASA, and an impact originating internally or externally could result in “instantaneous” blade fracture. Replacement of the blades is the subject of a service bulletin. But EASA is intending to reduce the risk of a dual in-flight shutdown of PW1100G engines on A320neo and A321neo jets while the modifications are being conducted. Within 3 months, says EASA, operators must ensure that aircraft with 2 affected powerplants have their engines de-paired. <br/>