SA1528SO
Installation of Litton LTN 72R inertial navigation system utilizing software program 72-7 supplement 72-19 installed. Held by Ontic Engineering and Manufacturing INC., which holds 59 approved modifications in all. Last revised March 17, 2022. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- M7 Aerospace LLC
- Models
- SA227-AT
- Type certificate
- A5SW
- 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 19, 2026.