# STC SA4-507

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Pan American World Airways Inc., United States
- Description: Deterjet DJ1025 valve in place of Wright torquemeter booster pump upper housing per STC SEW-10.
- Status date: January 1, 1960
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A10](https://openairdocs.org/tcds/4A10)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/163669ACF55FB71B862570D000529304.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-507

## ADs that name it (1)

- [AD 58-18-01](https://openairdocs.org/ad/58-18-01): Governor · Curtiss-Wright/Marquette Double Row Turbo Cyclone 972TC18DA1 (R-3350-34, -91), Double Row Turbo Cyclone 972TC18DA2, Double Row Turbo Cyclone 972TC18DA3 and 9 more. Cited in the text

## Approved models (1)

- McDonnell Douglas Corporation DC-7 Series ([TCDS 4A10](https://openairdocs.org/tcds/4A10))

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