SE639SW
Continental W-670 link rods. Held by Aircraft Engine Service INC, which holds 3 approved modifications in all. Last revised January 1, 1960. System: engine.
What it applies to
- Kind of product
- Engine
- Design holder
- Jacobs Service Company; Jacobs Service Company; Jacobs Service Company
- Models
- R-755B Series, R-755A Series, R-755E
- Type certificates
- E-237, E-237, E-237
- 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.