SA920SO
Installation of Teledyne P/N BB638/T- Series lead-acid replacement batteries. Held by Teledyne Battery Products, which holds 56 approved modifications in all. Last revised February 24, 1978. System: electrical power.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company
- Models
- E90, 99, A100 (U-21F), 200 (A100-1 (U-21J))
- Type certificates
- 3A20, A14CE, A14CE, A24CE
- On this site
- Beechcraft A100 15 registered
Beechcraft E-90 King Air E90 146 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 7, 2026.