# STC ST00231LA-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Midwest Express Airlines, United States
- Description: Installation of PTC Model 950 first class seats modified for aft facing and provisions only modification for GTE phone system.Note: Responsible ACO is Los Angeles ACO, NM-L.
- Applied: August 6, 1996
- Status date: October 23, 2003
- 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/DB0D1D3B8A96BCA086256DD400712FE9.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST00231LA-D

## ADs that name it (0)

None.

## Approved models (8)

- McDonnell Douglas Corporation DC-9-11 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-12 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-13 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-14 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-15 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-15F ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-32 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-81 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))

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