The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · reissued

ST00500DE-D

Installatio of SAFT 37 ampere-hour nickel cadmium batteries. Held by Saft America INC, which holds 7 approved modifications in all. Last revised September 6, 2001. System: electrical power.

What it applies to

Kind of product
Aircraft
Design holder
Learjet Inc.
Models
Learjet 45
Type certificate
T00008WI
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.