# STC SA42RM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Frontier Airlines Inc, United States
- Description: Installation of two Sperry GH-14 gyro-horizon instruments.
- Applied: September 20, 1974
- Status date: January 20, 1975
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 6A6](https://openairdocs.org/tcds/6A6)
- Certificate PDF: https://openairdocs.org/files/sha256/7a/6c/7a6cd0484dbfa1c60d75b8cfefc9c8bf98d4adc6a98dfd2f12a6d2d40429f751
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8C3C676C62D572E185256CC2000E3B62.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA42RM

## ADs that name it (0)

None.

## Approved models (1)

- Tracor Flight Systems Inc. 340 ([TCDS 6A6](https://openairdocs.org/tcds/6A6))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration T8IRM-D5 Supplemental Type Certificate priviled Number: SA42RM This certificate issued to: Frontier Airlines 8250 Smith Road Denver, Colorado 80207 Part 4b of the CAR Regulations:

Original Product - Type Certificate Number: 6A6 Make: Convair Model: 340/440 (CV-580) Description of Type Design Change: Installation of tWO Sperry GH-14 primary gyro horizon instruments, rearrangement of the captain's and flight officer's instrument panels, and installation of single King KDM-705A DME system with dual indicators in accordance with Frontier Airlines Top Drawing 331-411478 Revision C.

Limitations and Conditions: This approval should not be extended to other aircraft of this model on which previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft.

Date of Application: September 20, 1974 Date Reissued: January 20, 1975 Date of Issuance: January 15, 1975 Date Amended:

FEDERAL AVIATION By Direction of the Administrator (Signature) * MINISTRATO MARK E. BALDWIN, Chief Engineering and Manufacturing Branch, ARM-210 (Title)

47.

## Every issue (1)

- January 20, 1975: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/7a/6c/7a6cd0484dbfa1c60d75b8cfefc9c8bf98d4adc6a98dfd2f12a6d2d40429f751)

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