# STC ST701SO-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Pan American World Airways, Inc., United States
- Description: Installation of alternate inertial navigation system control display unit. Limited to aircraft N870PA, S/N 20016; N871PA, S/N 20017; N872PA, S/N 20018. (707-326C)
- Status date: June 10, 1969
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A26](https://openairdocs.org/tcds/4A26)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0BF8DE5E7983D0BB85256CC3000360D6.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST701SO-D

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 707 ([TCDS 4A26](https://openairdocs.org/tcds/4A26))

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