SA2912WE
Installation of palletized dual LTN-51 INS or dual LTN-72 INS or combination of either. Held by Litton Systems, INC, which holds 25 approved modifications in all. Last revised September 26, 1974. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; Lockheed Aircraft Corporation
- Models
- 150L, 150J, 150H, 150D, 150E, 150G, 150F, 150K, 382G
- Type certificates
- 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, A1SO
- On this site
- Cessna 150 7,993 registered
Lockheed Martin Corp 382 5 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 21, 2026.