# STC SA531NE

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Simmonds Precision Products Inc, United States
- Description: Installation of a Simmonds Precision total fuel/Vref dual indicator, P/N 393080-203 thru -223.  Must be installed concurrently with STC SA520NE.
- Applied: June 12, 1987
- Status date: January 8, 2004
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E13389414DD5862586256E290071CC45.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA531NE

## ADs that name it (0)

None.

## Approved models (2)

- The Boeing Company 737-100 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))
- The Boeing Company 737-200 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))

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