SR00026DE
Installation of tailboom 24 inch plug extension, commercial style main rotor blades, and rotorhead. Held by Midwest Aerospace Tc LLC, which holds 11 approved modifications in all. Last revised February 8, 2023. System: rotorcraft systems.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Garlick Helicopters Inc.; Garlick Helicopters Inc.; Hawkins & Powers Aviation Inc.; International Helicopters Inc.; Williams Helicopter Corporation; Richards Heavylift Helo Inc.
- Models
- UH-1B, UH-1B, UH-1B, UH-1B, UH-1B, UH-1B
- Type certificates
- H3NM, H13WE, H1RM, H5SO, H7SO, H3SO
- On this site
- Garlick Helicopters Inc UH-1 10 registered
Williams Helicopter Corp UH-1 7 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.