ST1033SO
Replace existing nickel-cadmium batteries with Teledyne Gill BB638/T series lead-acid battiers. Held by Teledyne Battery Products, which holds 56 approved modifications in all. Last revised April 29, 1996. System: electrical power.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.
- Models
- Learjet 24 Series, Learjet 29, Learjet 28, Learjet 25 Series, Learjet 35 Series, Learjet 36 Series, Learjet 23
- Type certificates
- A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A5CE
- 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.