Engine Fuel & Control - Fuel Nozzles and Supply Manifold Assemblies - Inspection / Replacement / Modification
- Published
- Effective
- Deadline
- Replaces
- 2016-22-05
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Pratt & Whitney PW4164, PW4164-1D, PW4168, PW4168-1D, PW4168A, PW4168A-1D, and PW4170 engines must perform initial and repetitive inspections of fuel nozzles and fuel nozzle supply manifold assemblies. Replace affected fuel nozzles within 24 months of May 2, 2019, and replace fuel nozzle supply manifold assemblies and install new brackets and clamps at the next shop visit or within 60 months, whichever occurs first. Maintain records of compliance and use approved service information for all actions.
Summary
The Federal Aviation Administration's Airworthiness Directive 2019-06-07 addresses certain Pratt & Whitney PW4164, PW4164-1D, PW4168, PW4168-1D, PW4168A, PW4168A-1D, and PW4170 turbofan engines. This directive mandates inspections and replacements related to fuel nozzles and fuel nozzle supply manifold assemblies to prevent fuel leaks associated with the Talon IIB combustion chamber configuration. It also requires installation of new brackets and clamps on the fuel nozzle supply manifold assemblies.
What changed
This AD supersedes AD 2016-22-05 by expanding inspection requirements to include fuel nozzle supply manifold assemblies in addition to fuel nozzles. It introduces mandatory installation of new brackets and clamps on the fuel nozzle supply manifold assemblies and clarifies compliance requirements and terminology. The compliance time for replacing fuel nozzles remains 24 months, while the deadline for replacing manifold assemblies and installing brackets and clamps has been extended to the next shop visit or within 60 months.
Why it matters
This directive is critical for aviation professionals to mitigate the risk of fuel leaks caused by cracks in fuel nozzle braze joints and fuel manifold tubes, which can compromise engine safety and reliability. Operators and maintenance organizations must ensure compliance to maintain airworthiness and prevent potential in-flight fuel system failures. Clear guidance on inspection intervals and replacement parts helps streamline maintenance planning and regulatory adherence.
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