# STC SA1421GL

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: ABX Air Incorporated, United States
- Description: Installation of Supplemental Electric Heater.
- Applied: March 29, 1989
- Status date: July 29, 2014
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A25](https://openairdocs.org/tcds/4A25)
- Certificate PDF: https://openairdocs.org/files/sha256/ef/33/ef3364657cc029a074f0074e685aea3fdef2ecd8241af1eb59b73b2a279869ac
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F9A4ED030D06A49C86257D27006A39D4.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1421GL

## ADs that name it (0)

None.

## Approved models (6)

- McDonnell Douglas Corporation DC-8-61 ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- McDonnell Douglas Corporation DC-8-61F ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- McDonnell Douglas Corporation DC-8-62 ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- McDonnell Douglas Corporation DC-8-62F ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- McDonnell Douglas Corporation DC-8-63 ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- McDonnell Douglas Corporation DC-8-63F ([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 (1)

- July 29, 2014: Surrendered, Current. [certificate](https://openairdocs.org/files/sha256/ef/33/ef3364657cc029a074f0074e685aea3fdef2ecd8241af1eb59b73b2a279869ac)

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