EASA SIB AV-2007-03R1: Flexible Fuel Manifolds - Pratt & Whitney Canada PW 100 Series Engines

What to do

Maintain compliance with Pratt & Whitney Canada Service Information Letter PW100-098R2 at the earliest opportunity. Use the recommended tool kit (PWC 56616) for correct torque application during installation and removal of the flexible fuel manifold. Report any malfunctions or defects related to the fuel manifold to Transport Canada via the Service Difficulty Reporting program.

Summary

Transport Canada Civil Aviation Service Difficulty Advisory AV-2007-03R1 addresses issues with the flexible fuel manifolds installed on Pratt & Whitney Canada PW100 series engines. The advisory highlights problems with improperly torqued manifold nuts leading to fuel leaks and engine fires. It provides guidance to ensure proper installation and maintenance of these fuel manifolds to maintain engine safety and reliability.

What changed

This advisory introduces the use of a specific tool kit (PWC 56616) including a pre-set torque wrench to ensure correct torque application on flexible fuel manifold nuts. It also references Service Information Letter PW100-098R2 from Pratt & Whitney Canada, which details the correct procedures for installation and removal of the fuel manifold components. The advisory updates maintenance practices to prevent fuel leaks and potential engine fires associated with the flexible fuel manifold.

Why it matters

Proper torque application on fuel manifold nuts is critical to prevent fuel leaks that can lead to engine fires, posing serious safety risks. Aviation maintenance professionals, operators, and overhaul agencies must follow the updated procedures to ensure engine integrity and avoid costly repairs or accidents. Compliance with this advisory supports continued airworthiness and operational safety of aircraft powered by PW100 series engines.