EASA SIB NE-01-23R1: Tarver Propeller, LLC (Formerly Brown Propeller, South 80, Univair, and Koppers) Aeromatic Wood Blade Propellers.

What to do

Operators should routinely inspect the propeller blades for looseness during preflight checks by checking for any fore and aft motion where the wood blade enters the metal ferrule. If any looseness is detected, the propeller must be removed and sent to a certified repair station for maintenance in accordance with Tarver Propellers, LLC Service Bulletin No. 2000-001B dated October 7, 2008. No specific compliance deadline is mandated, but inspections should be part of regular preflight routines.

Summary

The Special Airworthiness Information Bulletin SAIB NE-01-23R1 issued by the FAA Aircraft Certification Service provides updated information regarding Tarver Propeller, LLC Aeromatic wood blade propellers used on various aircraft including Aeronca 15AC, Bellanca 14-13 and 14-19 series, Cessna 120, 140, 170A, 170B, Piper PA series, Stinson L-5 series, and others. This bulletin addresses propeller assembly concerns related to blade looseness and clarifies that no unsafe condition warranting an airworthiness directive currently exists. It applies specifically to Tarver propeller blades installed on hub Models F200, F200H, 220, 220-1, and 220H.

What changed

SAIB NE-01-23R1 revises the original SAIB NE-01-23 by removing non-Aeromatic propeller models from the applicability list and updates the findings related to blade failures, clarifying that rust from lag screws—not wood rot—is the cause of observed powder near the ferrule. It also references Tarver Propellers, LLC Service Bulletins 2000-001A and 2001-001B for inspection and maintenance guidance.

Why it matters

This bulletin informs operators, owners, and maintenance personnel that while no unsafe condition currently requires mandatory action, vigilance in inspecting Aeromatic wood blade propellers is important to ensure continued airworthiness. Understanding the root cause of past blade failures helps prevent unnecessary replacements and supports proper maintenance practices. It aids compliance teams in prioritizing inspections and repairs based on updated technical data.