SA110RM
Modify Cessna exhaust system by replacement of the inter-cylinder expansion joints with a slip fit joint. Held by Heliarc Welding Service INC., which holds 28 approved modifications in all. Last revised August 17, 1977. System: engine.
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; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company
- Models
- T310P, T310Q, T310R, 320, 320A, 320B, 320C, 320D, 320E, 320F, 340, 340A
- Type certificates
- 3A10, 3A10, 3A10, 3A25, 3A25, 3A25, 3A25, 3A25, 3A25, 3A25, 3A25, 3A25
- On this site
- Cessna 320 137 registered
Cessna 340 707 registered
Cessna T-310 207 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 7, 2026.