SE4493NM
Installation of oil filter adapter and oil filter. Held by Airwolf Filter Corporation, which holds 61 approved modifications in all. Last revised December 20, 2017. System: engine.
What it applies to
- Kind of product
- Engine
- Design holder
- Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation
- Models
- GO-435-C2, GO-435-C2B, GO-435-C2B1, GO-435-C2B2, GO-435-C2E, O-435-A, O-435-A2
- Type certificates
- E-228, E-228, E-228, E-228, E-228, E-228, E-228
- 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 21, 2026.