SE4020NM
Installation of Ritter and Iverson Cam P/N 32122-1. Held by Ritter & Iverson CO, INC, which holds 2 approved modifications in all. Last revised October 5, 1987. System: engine.
What it applies to
- Kind of product
- Engine
- Design holder
- Teledyne Continental Motors; Teledyne Continental Motors
- Models
- IO-520-F, IO-520-A
- Type certificates
- E5CE, E5CE
- 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.