EASA SIB 2007-33: FAA SAIB NE-07-53 - Non-conformities on Propellers Inspected and Overhauled by Desert Aircraft Blade Service

What to do

Operators and maintenance facilities should inspect any propeller inspected or overhauled by Desert Aircraft Blade Service according to the propeller manufacturer's service documentation and verify compliance with all relevant Airworthiness Directives. If nonconformities are found, they should report the details, including propeller model and aircraft installation information, to the FAA. No specific compliance deadline is provided, but prompt action is recommended.

Summary

FAA Special Airworthiness Information Bulletin NE-07-53 is an informational bulletin addressing nonconformities found on propellers inspected and overhauled by Desert Aircraft Blade Service, specifically including Hartzell Propeller Inc. model HC-92ZK-2B two-bladed propellers installed on Piper PA-23-23 aircraft. The bulletin highlights corrosion, wear beyond service limits, and incomplete compliance with certain Airworthiness Directives on these propellers. EASA Safety Information Notice 2007-33 references this FAA bulletin to alert European operators and maintenance organizations.

What changed

This bulletin introduces awareness of potential safety issues related to propellers serviced by Desert Aircraft Blade Service, detailing specific nonconformities such as corrosion, worn components, and incomplete AD compliance. It does not mandate actions but recommends thorough inspections and reporting of findings to the FAA. The bulletin serves as a new advisory rather than an amendment to existing regulations.

Why it matters

The bulletin is important for aviation professionals because it identifies potential safety risks in propellers that could affect aircraft performance and safety. Operators, maintenance organizations, and repair stations must be vigilant in inspecting affected propellers to prevent in-service failures. Compliance teams need to ensure all applicable Airworthiness Directives have been properly completed to maintain regulatory compliance and aircraft airworthiness.