# STC SA1920SO

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Airborne Express Inc.
- Description: Installation of Dual IDC Mach/ Airspeed indicators.
- Status date: May 1, 1986
- Data sheets: 4A25
- Certificate PDF: https://openairdocs.org/files/sha256/03/42/034210408d958964fec32869015f12e4ce9c2185a1def7e22ba95e180a79de18
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID109553824120260811181319.0001
- Page: https://openairdocs.org/stc/SA1920SO

## ADs that name it

None.

## Approved models (1)

- McDonnell Douglas Corporation DC-8-62 (TCDS 4A25)

## What the certificate says

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

## Every issue (3)

- May 1, 1986: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/03/42/034210408d958964fec32869015f12e4ce9c2185a1def7e22ba95e180a79de18)
- May 1, 1986: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/9f/61/9f61275cf70d1f3f816c87496d0e1f5ef9327f45914ef432f8ebcb1eb5114274)
- April 1, 1986: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/35/62/356263f3963edf1d0063be73dd9c131c3f896611bf9d2af684e15843e4f0dde8)

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From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.