Every AD in the library whose text names the MD Helicopters MD 900, of which 11 are registered in the US.
No ADs listed yet.
No AD in the library names the MD Helicopters MD 900 as an airframe. The equipment ADs below name it.
ADs written for equipment (an exhaust muffler, a display, a seat belt) whose text names the MD Helicopters MD 900, usually in a list of aircraft it is approved for. Whether one applies depends on whether that equipment is installed.
Listed by the model designations in each AD's text. An AD written for a part number, or for "all" engines of a maker, may name no model and so not appear here: search the library for the part or the maker as well.
