Fabrication of AMC Part Number AM369DSK400-103, Engine Oil Hose Assembly in accordance with AMC Master Drawing List No. MDL-AMC-020, Revision IR, dated July 18, 2005, or later Federal Aviation Administration (FAA) approved revision. The Engine Oil Hose Assembly must be installed in accordance with AMC Installation Instructions AMC MI-05004, Revision IR, dated July 7, 2005, or later FAA approved revision.

Installation of an engine inlet air filtration system

Installation of Brim Aviation tundra pads in accordance with McClenahan Engineering Master Drawing List and Installation Instructions number DM0916-3, revision IR, dated April 21, 2009, or later FAA-approved revision. This modification must be maintained in accordance with Brim Aviation Instructions for Continued Airworthiness number DM0916-8, revision N/C, dated June 17, 2009, or later FAA-accepted revision.

Replace the aft engine compartment heat blanket with a stainless steel firewall.

Installation of engine firewall in Hughes 369 model.

Installation of engine oil cooler inspection panel.

Installation of engine compressor inspection panel in accordance with Installation Instructions RDE 109-20, Rev A, dated 5/10/00, or later FAA approved revisions.

Installation of a Brim Aviation cargo rack in accordance with McClenahan Engineering Master Drawing List and Installation Instructions number DM0916-3, revision IR, dated April 21, 2009, or later FAA-approved revision. This modification must be maintained in accordance with Brim Aviation Instructions for Continued Airworthiness number DM0916-9, revision N/C, dated June 17, 2009, or later FAA-accepted revision.