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Wed, Mar 27, 2019

AD: Pratt & Whitney Division Turbofan Engines

AD NUMBER: 2019-06-02

PRODUCT: Certain Pratt & Whitney Division (PW) PW4158 turbofan engines.

ACTION: Final Rule.

SUMMARY: This AD was prompted by several reports of high cycle fatigue (HCF) cracks found in the fuel nozzle supply manifold.

This AD requires replacement of the affected fuel nozzles and fuel nozzle manifold supply assemblies with parts eligible for installation.

This AD also requires installation of new brackets and clamps on the fuel nozzle supply manifold assemblies.

DATES: This AD is effective April 30, 2019.

COST: The FAA estimates that this AD affects 114 engines installed on airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

  • Remove and replace (24) fuel nozzles: 48 work-hours × $85 per hour = $4,080 per engine. Parts: $423,471.12 Cost per engine: $427,551.12.
  • Replace fuel supply manifold tubes and install new clamps and brackets: 16 work-hours × $85 per hour = $1,360 per engine. Parts: $77,158.97. Cost per engine  $78,518.97.
FMI: AD

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