SR01363SE

Fabrication of AMC Part Number AM369D21308 main rotor spacer in accordance with AMC Master Drawing List No. MDL-AMC-016, Revision A, dated June 30, 2003, or later Federal Aviation Administration (FAA) approved revision. The main rotor spacer must be installed in accordance with AMC Installation Instructions AMC MI-03005, Revision IR, dated March 24, 2003, or later FAA approved revision. Held by Aerometals, which holds 54 approved modifications in all. Last revised March 1, 2005. System: rotorcraft systems.

What it applies to

Kind of product: Aircraft
Design holder: MD Helicopter Inc.; MD Helicopter Inc.; MD Helicopter Inc.; MD Helicopter Inc.; MD Helicopter Inc.
Models: 369D, 369E, 369FF, 500N, 600N
Type certificates: H3WE, H3WE, H3WE, H3WE, H3WE
On this site: Md Helicopters Inc 500 15 registered
Md Helicopters Inc 600 11 registered
Md Helicopters Llc 369 34 registered
The FAA's record: On the FAA's site

What an approved modification is

A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.

Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 7, 2026.