# STC SA1917SO

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Airborne Express Inc., United States
- Description: Installation of third Sperry vertical gyro system VG-311.
- Applied: October 18, 1985
- Status date: May 1, 1986
- Product: Aircraft, Large Airplane
- Data sheets: [TCDS 4A25](https://openairdocs.org/tcds/4A25)
- Certificate PDF: https://openairdocs.org/files/sha256/bb/7d/bb7d9231b7b55008c1e0dc825280f6673c370ba7cbfd389372b11fa4bc3dbc0c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID105667754220260807154618.0001
- DRS record last changed: August 7, 2026
- Page: https://openairdocs.org/stc/SA1917SO

## ADs that name it (0)

None.

## Approved models (1)

- McDonnell Douglas Corporation DC-8-62 ([TCDS 4A25](https://openairdocs.org/tcds/4A25))

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (2)

- May 1, 1986: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/bb/7d/bb7d9231b7b55008c1e0dc825280f6673c370ba7cbfd389372b11fa4bc3dbc0c)
- April 2, 1986: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/cd/f6/cdf6b3b9f19b1952446a9eb2a2c1816102b67f23e998aba80d0a9ac171a234f5)

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