Avia Propeller Ltd. V410, V500A, V503, V503A, V503AP, V503P, V506, and V520 SAIB NE-09-51

FAA Aircraft Certification Service
SPECIAL AIRWORTHINESS INFORMATION BULLETIN
SAIB: NE-09-51
SUBJ: Propeller Blade Section Date: September 23, 2009
This is information only. Recommendations aren’t mandatory.
Introduction
This Special Airworthiness Information Bulletin alerts you, owners, operators, and certificated repair facilities of Avia Propeller Ltd. V410, V500A, V503, V503A, V503AP, V503P, V506, and V520
propellers, that Avia Propeller Ltd. has issued Service Bulletin (SB) Number 6, Issue F, copy attached. This SB specifies inspection of the blades of these propellers for fatigue cracks that may be initiated by an impact on the blade surface. These propellers are known to be installed on, but not limited to, Zlin Z-42M, Z-42MU, Z-142, Z-43, Z-50M, Let Kunovice Ae 45, Ae-145, Z-37, Z-37A, L-200A, L-200D, and Orličan L-40 aircraft. At this time, the airworthiness concern is not an unsafe condition that would warrant airworthiness directive (AD) action under Title 14 of the Code of
Federal Regulations (14 CFR) part 39. At this time, these propellers do not have a U.S. type certificate.
Background
A V500A propeller blade, while operating on an aircraft on the ground, failed due to a fatigue crack initiated by a blade impact by an unknown object. In response to this event, the European Aviation
Safety Agency issued AD 2009-0059, copy attached. That AD mandates a visual inspection before further flight for cracks of Avia Propeller Ltd. V410, V500A, V503, V503A, V503AP, V503P, V506, and V520 propeller blades, using Avia SB Number 6. That AD also mandates repetitive visual inspections of the propeller blades for cracks until the propeller is overhauled.

SAIB, SB, EASA AD Attached