SA211GL
Installation of windshield P/N W-2055, W/T-2055 or W/G-2055 on Cessna 172 and 172A, and P/N W-2056, W/T-2056 or W/G-2056 on Cessna 172B and 172C. Held by Great Lakes Aero Products INC, which holds 19 approved modifications in all. Last revised January 31, 2007. System: airframe structure.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company
- Models
- 172, 172A, 172B, 172C
- Type certificates
- 3A12, 3A12, 3A12, 3A12
- On this site
- Cessna 172 Skyhawk 20,669 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.