SA4956NM
OPTION 1: Installation of American Aviation intercooled engines as modified by STC SE4159NM. OPTION 2: This installation with the cowl scoops only. Held by American Aviation INC, which holds 20 approved modifications in all. Last revised November 1, 1998. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Cessna Aircraft Company; Cessna Aircraft Company
- Models
- 414A, 414
- Type certificates
- A7CE, A7CE
- On this site
- Cessna 414 Chancellor 605 registered
- 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.