# STC SA3129SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Eastern Airlines, Inc, United States
- Description: Installation of 115 passenger interior(22 first class/75 tourists class seats).
- Status date: September 20, 1991
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CE82F5D0F7E02F6D85256CC2000A9435.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3129SO

## ADs that name it (0)

None.

## Approved models (1)

- McDonnell Douglas Corporation DC-9-30 Series ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))

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