SA518SO
Installation of Continental IO-520-E derated engines and McCauley D3AF32C87/82NC-6 or -8 propellers. Modification to be accomplished in accordance with Colemill Enterprises, Inc. Drawing AC5800 Rev. A and AC5801 Rev A and Installation Instructions dated 7 July 1972 and revised 21 August 1972. Owner s Manual Supplement dated 21 August 1972 included in data. Held by Mike Jones Aircraft Sales INC., which holds 19 approved modifications in all. Last revised February 10, 2011. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company
- Models
- 320, 320-1, 320A, 320B, 320C
- Type certificates
- 3A25, 3A25, 3A25, 3A25, 3A25
- On this site
- Cessna 320 137 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 12, 2026.