# STC ST00090MC

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: King Aerospace Inc., United States
- Description: Installation of a Raytheon APX-119 IFF Transponder System
- Applied: September 28, 2011
- Status date: December 10, 2012
- Product: Aircraft, Large Airplane
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A20EA](https://openairdocs.org/tcds/A20EA)
- Certificate PDF: https://openairdocs.org/files/sha256/3d/56/3d5657aa4aa30f1b001ac9bfe792d593646789dc839a29170f51a6cb49b6eca1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BC192ED9654F148886257ADA006F4EBC.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/ST00090MC

## ADs that name it (0)

None.

## Approved models (5)

- Viking Air Limited DHC-7-1 ([TCDS A20EA](https://openairdocs.org/tcds/A20EA))
- Viking Air Limited DHC-7-100 ([TCDS A20EA](https://openairdocs.org/tcds/A20EA))
- Viking Air Limited DHC-7-101 ([TCDS A20EA](https://openairdocs.org/tcds/A20EA))
- Viking Air Limited DHC-7-102 ([TCDS A20EA](https://openairdocs.org/tcds/A20EA))
- Viking Air Limited DHC-7-103 ([TCDS A20EA](https://openairdocs.org/tcds/A20EA))

## 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 ST00090MC

This certificate issued to: King Aerospace Inc.

4444 Westgrove, Suite 250 Addison, Texas 75001

Part 25 of the Federal Aviation Regulations.

Original Product - Type Certificate Number: A20EA Make: Viking Air Limited Model: DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103 Description of Type Design Change:

Installation of a Raytheon APX-119 IFF Transponder System in accordance with Master Data List, APX-119 IFF Transponder System Viking Air Limited Model DHC-7-() Airplanes, Document Number KA1295-1004, Revision IR dated November 2, 2012, FAA approved December 10, 2012 or later FAA approved revision.

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

(See continuation sheet 3 of 3 for additional limitations.)

(Signature) Derek Morgan Manager Military Certification Office (Title) Date of application: September 28, 2011 Date of issuance: December 10, 2012

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 ST00090MC

2. 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.

3. Instructions for Continued Airworthiness, Document KA1295-2025 entitled: "Instructions for Continued Airworthiness for APX-119 IFF Transponder System in Viking Air Limited Model DHC-7-() Airplanes, Revision IR, dated August 30, 2012, or later FAA accepted revision is required for this installation.

4. A copy of this certificate and FAA approved Airplane Flight Manual Supplement, Document KA1295- 2023, Revision A, FAA approved December 10, 2012, or later FAA approved revision must be maintained as part of the permanent records of the modified aircraft.

5. Modes 1, 2 and 4 of the APX-119 IFF Transponder are for Military/Public operations only.

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

## Every issue (1)

- December 10, 2012: Issued, Current. [certificate](https://openairdocs.org/files/sha256/3d/56/3d5657aa4aa30f1b001ac9bfe792d593646789dc839a29170f51a6cb49b6eca1)

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