# STC SE00045AT-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Aero Component Technologies, United States
- Description: Modify -59A LPT case to reduce the thickness of four bosses to eliminate interference with the turbine case cooling manifold installed on -7Q engines. This modification permits use of the -59A LPT case on-7Q engines.
- Status date: December 21, 1992
- Product: Engine
- Certification basis: Part 21
- Data sheets: [TCDS E3NE](https://openairdocs.org/tcds/E3NE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E02F67FC23EDF45C85256CC2005A738C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SE00045AT-D

## ADs that name it (0)

None.

## Approved models (2)

- Pratt & Whitney Division JT9D-59A ([TCDS E3NE](https://openairdocs.org/tcds/E3NE))
- Pratt & Whitney Division JT9D-7Q ([TCDS E3NE](https://openairdocs.org/tcds/E3NE))

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