SA09628AC-D
1. Installation of S-TEC 01298 or 01304 Digital Flight Control System (DFCS), in according with Master Data List 921128, Rev. 11, dated 3-16-11 or later FAA Approved revisions of the above data. Held by S-Tec Corporation, which holds 1,083 approved modifications in all. Last revised March 21, 2011. System: flight controls.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation
- Models
- 690C, 690D, 695, 695A
- Type certificates
- 2A4, 2A4, 2A4, 2A4
- 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.