SA1525SW
Installation of TRAMM BT1 600 nickel cadmium battery temperature indicator. Held by Foxcart Gse, LLC, which holds 14 approved modifications in all. Last revised February 18, 2016. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Lockheed Martin Corporation; Lockheed Martin Corporation; Lockheed Martin Corporation; Lockheed Martin Corporation
- Models
- 1329-23A, 1329-23D, 1329-23E, 1329-25
- Type certificates
- 2A15, 2A15, 2A15, 2A15
- On this site
- Lockheed 1329 6 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.