# STC ST446SO

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Lockheed Martin Aeronautics Company
- Description: 180 inch increase in fuselage length, installation of Allison 501-D22A engines in lieu of 501-D22 engines, and miscellaneous structural and equipment changes incidental to the primary modification.
- Status date: February 10, 1989
- Data sheets: A1SO
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3831E6F7CB91B47985256CC300036023.0001
- Page: https://openairdocs.org/stc/ST446SO

## ADs that name it

None.

## Approved models (1)

- Lockheed Aircraft Corporation 382B (TCDS A1SO)

---
From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.