# STC ST00121MC

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Sierra Nevada Corporation, United States
- Description: Installation of a Ku Band Satellite Communications System and Radome
- Applied: May 10, 2012
- Status date: January 8, 2015
- Product: Aircraft, Large Airplane
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A45NM](https://openairdocs.org/tcds/A45NM)
- Certificate PDF: https://openairdocs.org/files/sha256/65/11/65118b3c0eb4a61e3c0cc43e567911d433f810c77218aa765f6218368e298673
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/95614DFEF5094A5D86257DCD0067AA34.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/ST00121MC

## ADs that name it (0)

None.

## Approved models (1)

- 328 Support Services GmbH 328-100 ([TCDS A45NM](https://openairdocs.org/tcds/A45NM))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

Number ST00121MC This certificate issued to: Sierra Nevada Corporation 11551 East Arapahoe Road Centennial, Colorado 80112

Part 25 of the Federal Aviation Regulations.

Original Product - Type Certificate Number: A45NM Make: 328 Support Services GmbH Model: 328-100 Description of Type Design Change:

Installation of a Ku Band Satellite Communications System and Radome in accordance with Sierra Nevada Corporation (SNC) Master Drawing List (MDL) MDL-0215-00-9370, Revision B, dated September 24, 2014 and FAA approved January 6, 2015, or later FAA approved revision.

1. A prerequisite to this installation is the installation of the Sierra Nevada Corporation STC ST00120MC , inclusive of all limitations noted on the certificate.

2. Instructions for Continued Airworthiness, Document 0215-00-9368, Revision A, titled: "Instructions for the Continued Airworthiness (ICA) for the Ku Band Satellite Communications System for the Sensor Test Bed Program”, dated July 2, 2014, FAA approved December 19, 2014 or later FAA approved revision is required for this installation and shall be made available to the operator at the time of this installation for incorporation into the operator’s maintenance program.

(See continuation sheet 3 of 3 for additional limitations)

(Signature) Derek Morgan Manager Military Certification Office (Title)

Transfer the ownership of the Supplemental Type Certificate Number to (Name of transferee) (Address of transfer) (Number and street)

(City, State, and Zip code ) from (Name of grantor) (Print or type) (Address of grantor) (Number and street)

(City, State, and Zip code ) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

Number ST00121MC

3. Compatibility of this design change with previously approved modifications must be determined by the installer.

4. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of the permission.

5. Installation of STC approved for Mod 20 Series Aircraft ONLY.

-----------------------------------------------------------END----------------------------------------------------------

## Every issue (1)

- January 8, 2015: Issued, Current. [certificate](https://openairdocs.org/files/sha256/65/11/65118b3c0eb4a61e3c0cc43e567911d433f810c77218aa765f6218368e298673)

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