Airworthiness directives › 2022-18-02
AD 2022-18-02 Airworthiness Directives; MT-Propeller Entwicklung GmbH Propellers
Makes named: mt-propeller. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to MT-Propeller Entwicklung GmbH: (1) MTV-5-1-( ), MTV-9-( ), MTV-12-( ), MTV-14-B, MTV-14-D, MTV-15-( ), MTV-16-( ), MTV-18-( ), and MTV-27-( ) variable pitch propellers with a propeller serial number (S/N) identified in MT-Propeller Entwicklung GmbH Alert Service Bulletin (ASB) No. 30, Revision 7, dated June 23, 2022 (MT-Propeller ASB No. 30, Rev. 7); and (2) MTV-5-1-( ), MTV-9-( ), MTV-11-( ), MTV-12-( ), MTV-14-B, MTV-14-D, MTV-15-( ), MTV-16-( ), MTV-17-( ), MTV-18-( ), MTV-20-( ), and MTV-27-( ) variable pitch propellers with a propeller blade S/N identified in MT-Propeller ASB No. 30, Rev. 7, installed.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) If the affected propeller or propeller blade is installed on a turboprop engine, before exceeding 120 days from the effective date of this AD, or within 50 flight hours (FHs) from the effective date of this AD, whichever occurs first, remove from service any propeller blade lag screw with part number (P/N) A-983-C-85 and replace with a part eligible for installation. (2) If the affected propeller or propeller blade is installed on a piston engine, before exceeding 60 days from the effective date of this AD, or within 25 FHs from the effective date of this AD, whichever occurs first, remove from service any propeller blade lag screw with P/N A-983-C-85 and replace with a part eligible for installation.
Unsafe condition
This AD was prompted by reports of certain propeller blade lag screws that were manufactured with an improper surface finish, which results in reduced fatigue strength of these lag screws. The FAA is issuing this AD to prevent in-flight blade detachment. The unsafe condition, if not addressed, could lead to release of the propeller, damage to the airplane, and reduced control of the airplane.
Affected ADs
None.
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1