ST09568SC
Modification of existing refrigerant R12 air conditioning systems to convert them into refrigerant R134a systems on the aircraft identified above. Held by Steinbach & Associates, INC., which holds 11 approved modifications in all. Last revised January 10, 2000. System: heating, ice protection and utility systems.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.
- Models
- Learjet 24, Learjet 24F, Learjet 24E, Learjet 24D-A, Learjet 24D, Learjet 24C, Learjet 24B-A, Learjet 24A, Learjet 25A, Learjet 24B, Learjet 31, Learjet 24F-A, Learjet 25, Learjet 36A, Learjet 36, Learjet 35A (C-21A), Learjet 31A, Learjet 29, Learjet 28, Learjet 25F, Learjet 25C, Learjet 25B, Learjet 35, Learjet 25D
- Type certificates
- A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE
- 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 21, 2026.