FAA · Supplemental Type Certificate
STC SR09177RC
Modification of the vertical fin spar in accordance with Garlick Master Drawing List GHI 97-07, Revision D dated 2-23-98, or later FAA approved revision is required.
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 (18)
- H4NM Bell Helicopter Textron Inc. · TH-1L
- H4NM Bell Helicopter Textron Inc. · UH-1E
- H4NM Bell Helicopter Textron Inc. · 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
- H3SO Richards Heavylift Helo Inc. · UH-1B
- 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
- H1RM San Joaquin Helicopters · UH-1B
- H8NM Smith Helicopters · UH-1E
- R00012AT Southern Helicopter Inc. · UH-1B
- H6SO Southwest Florida Aviation International · UH-1B
Certification basis — 14 CFR
Specific sections
- Sec. 111
- Sec. 113
- Sec. 115
- Sec. 117
- Sec. 119
- Sec. 120
- § 21.47
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗