SE03215CH
STC for the conversion of Lycoming O-320-A, B, C, D, E; IO-320-A, B, C, D, E, F; AIO-320-A, B; AEIO-320-D, E to increase engine displacement to 340 cubic inches by installation of a crankshaft with a longer stroke. Held by Continental Motors, INC., which holds 57 approved modifications in all. Last revised October 31, 2016. System: engine.
What it applies to
- Kind of product
- Engine
- Design holder
- Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines; Lycoming Engines
- Models
- AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A, AEIO-320-E1B, AEIO-320-E2A, AEIO-320-E2B, AIO-320-A1A, AIO-320-A1B, AIO-320-A2A, AIO-320-A2B, AIO-320-B1B, IO-320-A1A, IO-320-A2A, IO-320-B1A, IO-320-B1B, IO-320-B1C, IO-320-B1D, IO-320-B1E, IO-320-B2A, IO-320-C1A, IO-320-C1B, IO-320-D1A, IO-320-D1B, IO-320-D1C, IO-320-E1A, IO-320-E1B, IO-320-E2A, IO-320-E2B, IO-320-F1A, O-320-A1A, O-320-A1B, O-320-A2A, O-320-A2B, O-320-A2C, O-320-A2D, O-320-A3A, O-320-A3B, O-320-A3C, O-320-B1A, O-320-B1B, O-320-B2A, O-320-B2B, O-320-B2C, O-320-B2D, O-320-B2E, O-320-B3A, O-320-B3B, O-320-B3C, O-320-C1A, O-320-C1B,...
- Type certificates
- 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, 1E12, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274, E-274
- 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 20, 2026.