EASA SIB NE-15-21
Pratt & Whitney Canada PT6 Engines — Wencor Engineering Fuel Nozzle Sheath (PMA part)
Summary
The FAA Special Airworthiness Information Bulletin SAIB: NE-15-21 addresses a design issue with the Wencor Engineering fuel nozzle sheath, part number 3119920-01WE, used on Pratt & Whitney Canada PT6 engine models. The bulletin informs operators, repair stations, and maintenance personnel that this PMA fuel nozzle sheath may interfere with proper installation and engine performance. Affected PT6 engine models include various PT6A series such as PT6A-38, PT6A-41, PT6A-42, and others listed under TCDS E4EA and E26NE.
What Changed
This bulletin introduces a safety notification regarding the Wencor PMA fuel nozzle sheath, which has a thicker lower cap portion than the OEM part, causing potential contact issues with the fuel nozzle. The FAA recommends removal of all affected Wencor fuel nozzle sheaths from service and inventory due to unknown effects on engine performance. No mandatory airworthiness directive has been issued, but the FAA advises corrective action to mitigate potential risks.
Why It Matters
This information is critical for aviation professionals because improper fit of the fuel nozzle sheath can affect engine performance, temperature, and integrity, potentially leading to operational issues. Operators and maintenance organizations must be aware of the part incompatibility to avoid installation problems and ensure continued airworthiness. Compliance teams need to track and remove affected parts to maintain regulatory and safety standards.
What To Do
Operators and repair stations should remove all Wencor PMA fuel nozzle sheaths, P/N 3119920-01WE, from service at the earliest maintenance opportunity and no later than 600 flight hours after August 1, 2015. Spare parts must be removed from inventory and not installed. All removed parts and spares should be returned to Wencor for proper disposition.