SA4-1053
Ceconite 101 covering of complete airframe. Held by Cooper Engineering Corporation, which holds 123 approved modifications in all. Last revised January 1, 1960. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Waco Aircraft Company; The Waco Aircraft Company; The Waco Aircraft Company; The Waco Aircraft Company
- Models
- ZKS-7 (Army UC-72M), YKS-7 (Army UC-72K), UEC, U1C
- Type certificates
- 626, 626, ATC 467, ATC 499
- On this site
- Waco UEC 7 registered
Waco YKS-7 21 registered
Waco ZKS-7 5 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.