# STC SQ00220AT

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Summers G. H. Jr, United States
- Description: Replace fuel-selector valve with an overhauled and modified Consolidated Vultee B-24 (Type PE-3) fuel selector valve, and on the AT-6A thru AT-6F models, convert auxiliary outlet port of the left tank to become the main fuel outlet.
- Status date: June 11, 1993
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-2-575](https://openairdocs.org/tcds/A-2-575)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/90B9AF3DA833184C85256CC200622420.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SQ00220AT

## ADs that name it (0)

None.

## Approved models (7)

- Rockwell International Corporation AT-6A (SNJ-3) ([TCDS A-2-575](https://openairdocs.org/tcds/A-2-575))
- Rockwell International Corporation AT-6B ([TCDS A-2-575](https://openairdocs.org/tcds/A-2-575))
- Rockwell International Corporation AT-6C (SNJ-4) ([TCDS A-2-575](https://openairdocs.org/tcds/A-2-575))
- Rockwell International Corporation AT-6D (SNJ-5) ([TCDS A-2-575](https://openairdocs.org/tcds/A-2-575))
- Rockwell International Corporation AT-6F (SNJ-6) ([TCDS A-2-575](https://openairdocs.org/tcds/A-2-575))
- Rockwell International Corporation SNJ-7 ([TCDS A-2-575](https://openairdocs.org/tcds/A-2-575))
- Rockwell International Corporation T-6G ([TCDS A-2-575](https://openairdocs.org/tcds/A-2-575))

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