SA10081SC
Remove existing two piece wing spar web and replace with a single piece, heavier gauge aluminum web. Remove vertical stiffeners and horizontal reinforcement with heavier gauge aluminum and omit joggles in reinforcements. Held by T-34 Mentors LLC, which holds 9 approved modifications in all. Last revised August 20, 2020. System: airframe structure.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.
- Models
- 45 (Military YT-34), A45 (Military T-34A; B-45), D45 (Military T-34B)
- Type certificates
- 5A3, 5A3, 5A3
- 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.