Home Aviation Marine Corps declares Initial Operational Capacity for Sikorsky’s CH-53Ks AviationDefenseFairfieldLatest NewsPremium Content Marine Corps declares Initial Operational Capacity for Sikorsky’s CH-53Ks By Phil Hall - April 27, 2022 There are 46 aircraft fully on contract. This content is for Westfair Online members only. Please Sign in / Join to view this content. Become a member by Registering Here.