# STC SH4939NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Heli-Conversions Inc, United States
- Description: Pilot-in-Command position to be in either left or right seat with fully redundant controls and control-mounted switches
- Applied: February 20, 1990
- Status date: May 16, 1990
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H1SW](https://openairdocs.org/tcds/H1SW)
- Certificate PDF: https://openairdocs.org/files/sha256/c0/5c/c05cb2b8840bf01816537d202be2b268b9e26fe3a54404269b0d7e9059e5daf6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2F6BACE9A2BA8EC4862579CA006DE1F6.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SH4939NM

## ADs that name it (0)

None.

## Approved models (1)

- Bell Helicopter Textron Inc. 205A-1 ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))

## 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 Supplemental Type Certificate Number: SH4939N This certificate issued to: Hel i-Conversions, INC.

Part 6 ofthe Civil Air Regulations.

Original Product Type bertificate Number: HISM Макс: Bell Model: 205A -1 Description of Type Design Change: Pilot-in-Command position to De in either left or seat with fully redundant controls and control-mounted switches, in accordance with Heli-Jet Drawings 1 and 2, dated June 12, 1985, and four (4) photos the same date.

NOTE: This STC requires: Complete Bell co-pilot instrument kit, external load release switch on cyclic control, throttle start button, flight idle stop, and other items per STC SH2691NM.

Limilatins and bindilions: Data pertaining to this modification are considered This approval is limited to Pilot-in-Command operation from the left or right seat on Bell Model 205A-1 rotorcraft, Serial No. 30154, only. The modified rotorcraft must be operated in accordance with an FAA Approved copy of the Rotorcraft Flight Manual supplement, dated May 16, 1990. A copy of this Certificate and the Rotorcraft Flight Manual Supplement shall be maintained as part of the permanent records for the modified rotorcraft at all times.

Date of Application: February 20, 1990 Lute missued:

Date of Issuance: May 16, 1990 Sale unended:

FEDERAL AVIATION By Direction of the Administrator * MINISTRATO Manager, Airccaft Modification Branch Seattle Aircraft Certification Office (Title) 47 FAA FORM 8110-2 (10-68)

## Every issue (1)

- May 16, 1990: Issued, Current. [certificate](https://openairdocs.org/files/sha256/c0/5c/c05cb2b8840bf01816537d202be2b268b9e26fe3a54404269b0d7e9059e5daf6)

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