FAA · Supplemental Type Certificate
STC SE3329NM
Lycoming valve cover gasket
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 (9)
- 1E4 Lycoming Engines · IO-540-B1A5
- 1E4 Lycoming Engines · IO-540-B1C5
- 1E4 Lycoming Engines · IO-540-E1A5
- 1E4 Lycoming Engines · IO-540-E1B5
- 1E4 Lycoming Engines · IO-540-M1A5
- E14EA Lycoming Engines · TIO-540-A1A
- E14EA Lycoming Engines · TIO-540-A1B
- E14EA Lycoming Engines · TIO-540-A2A
- E14EA Lycoming Engines · TIO-540-A2B
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗