SH3744NM
Dual Battery Installation. Held by Wsh, LLC, which holds 7 approved modifications in all. Last revised March 3, 2023. System: electrical power.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Richards Heavylift Helo Inc.; Rotorcraft Development Corporation; Rotorcraft Development Corporation; Red Tail Flying Services LLC; WSH LLC; International Helicopters Inc.; Southwest Florida Aviation International; Southwest Florida Aviation International; Overseas Aircraft Support Inc.
- Models
- UH-1B, UH-1B, UH-1B, UH-1B, UH-1B, UH-1B, SW204 (UH-1B), SW204HP (UH-1B), UH-1B
- Type certificates
- H3SO, H13WE, H3NM, R00012AT, H1RM, H5SO, H6SO, H6SO, H7SO
- 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.