# STC SA1957NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: B/E Aerospace, United States
- Description: Installation of Nordskog Upper Bar Unit, P/N 1-620. (747-217)
- Applied: November 17, 1982
- Status date: April 23, 2002
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DAD523D3D9AC9AC486256D2C0071CE1F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1957NM

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 747-200B Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE))

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.