FAA · Supplemental Type Certificate
STC SR00119DE
Installation of an upgraded 42 degree Tail Rotor gearbox, P/N 212-040-003, and Control Cables
What is an STC?
A Supplemental Type Certificate authorizes a major modification or alteration to an FAA-certificated aircraft. STCs are how operators legally install new avionics, change fuel systems, add floats, swap engines, etc. — every change beyond a minor modification needs one.
Applicable aircraft (17)
- H13WE Rotorcraft Development Corporation · UH-1B
- H3NM Rotorcraft Development Corporation · UH-1B
- H5NM Rotorcraft Development Corporation · HH-1K
- H5NM Rotorcraft Development Corporation · TH-1L
- H5NM Rotorcraft Development Corporation · UH-1E
- H5NM Rotorcraft Development Corporation · UH-1L
- H5SO International Helicopters Inc. · UH-1B
- H7SO Overseas Aircraft Support Inc · TH-1L
- H7SO Overseas Aircraft Support Inc · UH-1E
- H7SO Overseas Aircraft Support Inc · UH-1L
- H8NM Smith Helicopters · UH-1E
- H3SO Richards Heavylift Helo Inc. · UH-1B
- H4NM Bell Helicopter Textron Inc. · TH-1L
- H4NM Bell Helicopter Textron Inc. · UH-1E
- H4NM Bell Helicopter Textron Inc. · UH-1L
- H9NM West Coast Fabrications · UH-1E
- H1RM Hawkins & Powers Aviation Inc. · UH-1B
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗