Airworthiness Directive · Amendment 39-21732 · Propeller hub section
AERO Sp. z o.o. Airplanes
This AD applies to AERO Sp. z o.o. Model AT-3R100 airplanes, all serial numbers, certificated in any category, with an ELPROP 3-1-1P propeller installed.
The FAA is adopting a new airworthiness directive (AD) for AERO Sp. z o.o. (AERO) Model AT-3R100 airplanes with an ELPROP 3-1-1P propeller. This AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI identifies the unsafe condition as cracks in the propeller hub. The FAA is issuing this AD to address the unsafe condition on these products.
(1) Before further flight after the effective date of this AD and thereafter at intervals not to exceed 50 hours time-in-service, inspect the propeller hub for cracks in accordance with paragraphs 5.1, 5.2, and 5.4 of the Instructions in AERO Sp. z o.o Mandatory Service Bulletin EPB.01.B, Issue 1, dated May 14, 2009; or AERO Sp. z o.o Mandatory Service Bulletin EPB.02.B, Issue 1, dated July 20, 2021, as applicable to your propeller, except you are not required to contact the manufacturer. If any crack or other discrepancy is found, before further flight, repair using a method approved by the Manager, International Validation Branch, FAA, or the European Union Aviation Safety Agency (EASA).
(2) As of the effective date of this AD, do not install an ELPROP 3-1-1P propeller on any airplane unless the propeller hub has passed the inspection required by paragraph (g)(1) of this AD.
