SA00373LA
Installation of engines, modified with addition of a Jacobs shielded ignition harness. Held by Aero Engines INC, which holds 2 approved modifications in all. Last revised May 23, 1997. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; The Waco Aircraft Company
- Models
- A75N1 (Army PT-17; -17A; Navy N2S-1; -4), B75N1 (Navy N2S-3), D75N1 (Army PT-27), UPF-7
- Type certificates
- A-743, A-743, A-743, A-642
- On this site
- Boeing A75 Stearman Kaydet 979 registered
Boeing B75 Stearman Kaydet 257 registered
Boeing D75 35 registered
Waco UPF-7 189 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.