SE73WE
BG-341 spark plug as eligible for installation on listed Continental engines. Held by Lewis Leibee, which holds 6 approved modifications in all. Last revised January 28, 1975. System: engine.
What it applies to
- Kind of product
- Engine
- Design holder
- Teledyne Continental Motors; Teledyne Continental Motors; Teledyne Continental Motors; Teledyne Continental Motors; Teledyne Continental Motors; Teledyne Continental Motors; Teledyne Continental Motors; Teledyne Continental Motors; Teledyne Continental Motors; Teledyne Continental Motors
- Models
- TSIO-520-L, TSIO-520-E, TSIO-520-G, TSIO-520-D, TSIO-520-J, TSIO-520-A, TSIO-520-B, TSIO-520-K, TSIO-520-C, TSIO-520-H
- Type certificates
- E8CE, E8CE, E8CE, E8CE, E8CE, E8CE, E8CE, E8CE, E8CE, E8CE
- 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.