SH4517NM
Installation of reinforcing insert inside lower vertical surface boss on aft tail boom forging. Held by Aerometals, which holds 54 approved modifications in all. Last revised November 9, 1998. System: rotorcraft systems.
What it applies to
- Kind of product
- Aircraft
- Design holder
- MD Helicopter Inc.
- Models
- 369H Series
- Type certificate
- H3WE
- On this site
- 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.