# STC ST981SO

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Everts Air Cargo
- Description: Deactivation of the cabin pressurization system, conversion of the cargo compartment to a class 'E' compartment, and modification of the ventilation system.
- Status date: June 14, 2010
- Data sheets: 6A3, 6A3, 6A4
- Certificate PDF: https://openairdocs.org/files/sha256/b9/f9/b9f9e2b725e409ce7adbac311c656c8d76fb2bb099c6175e0110342fd7ae4f9b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E05A280185874EE48625774A006603DA.0001
- Page: https://openairdocs.org/stc/ST981SO

## ADs that name it

None.

## Approved models (3)

- McDonnell Douglas Corporation DC-6A (Navy R6D-1) (TCDS 6A3)
- McDonnell Douglas Corporation DC-6A (USAF C-118A) (TCDS 6A3)
- McDonnell Douglas Corporation DC-6B (Navy R6D-1Z) (TCDS 6A4)

## What the certificate says

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

## Every issue (1)

- June 14, 2010: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/b9/f9/b9f9e2b725e409ce7adbac311c656c8d76fb2bb099c6175e0110342fd7ae4f9b)

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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.