Special Airworthiness Information Bulletin for Mooney aircraft

It seems there has been increased cases of landing gear failures for Mooney International Corporation (Mooney) Model M20, M20A, M20B, M20C, M20D, M20E, M20F, M20G, M20J, M20K, M20L, M 20M, M20R, M20S, M20TN, M20U, and M20V airplanes. 
For this reason, the FAA has issued a Special Airworthiness Information Bulletin prompting the subject aircraft owners to take the necessary actions.
According to the FAA publication, the main causes of the landing gear failures are:

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improper maintenance

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 age

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operational deterioration

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 and/or failure to perform established inspection 

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rigging requirements and procedures in applicable maintenance instructions

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The FAA recommends that all Mooney M20 series airplane owners and operators:

1. Continue to comply with SI M20-122 by following the applicable Mooney 100-Hour Inspection Guide and Service and Maintenance Manual instructions at each annual (100-hour) inspection. 
2. Review Mooney Service Bulletin M20-344 for information on proper maintenance and operation of the manual and electric landing gear systems.