SE5173NM
Installation of a replacement oil cooler adaptor, P/N ADC-310. Held by Aviation Development Corporation, which holds 13 approved modifications in all. Last revised July 10, 1991. System: engine.
What it applies to
- Kind of product
- Engine
- Design holder
- Lycoming Engines; Textron Lycoming AVCO Corporation
- Models
- O-235, O-290
- Type certificates
- E-223, E-229
- 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 5, 2026.