# STC SH5956NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Idaho Helicopters Inc, United States
- Description: Installation of Isolair Model4600-204 fire fighting system.
- Applied: September 15, 1992
- Status date: May 7, 1993
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H1SW](https://openairdocs.org/tcds/H1SW)
- Certificate PDF: https://openairdocs.org/files/sha256/8e/d8/8ed83a1d04f494baf11e989b649cd4ad01d43a44b6d8a4395943fd3a4968f770
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C8B0B76A74DD6AB585256CC200622148.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH5956NM

## ADs that name it (0)

None.

## Approved models (1)

- Bell Helicopter Textron 204B ([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: SH5956NM This certificate issued to: Idaho Helicopters, Inc.

Pure I of the CIVIl Air Regulalions.

Original Product - TypePertificale Number: H1SW Make: Bell Model: 204B Description of Type Design Change: Installation of Isolair Model 4600-204 Fire fighting system in accordance with Drawing 4600-204-10, no revision, dated September 17, 1991, Drawing 4600-204-15, no revision, dated June 24, 1991, and Drawing 4600-204-16, no revision, dated June 24, 1991.

Limilalins and bundilions: Data pertaining to this modification are considered inadequate for other aircraft. This approval is limited to the installation in Bell Model 2048, Serial No. 2040, R/N N41699, only. A copy of this Certificate, Continuation Sheet and FAA Approved Flight Manual Supplement dated May 7, 1993, must be maintained as part of the permanent Records for the modified aircraft.

(Continued on page 3) HISW apply except where superseded by the following:

This modification is intended for the purpose of aerial firefighting. No finding on compliance with noise requirements for operations other than firefighting have been made.

Airspeed Limitations: VNE = 100 KIAS Maximum jettison speed, power-off = 75 KIAS Electrical Loads: Turn off all non-essential loads during operation of fire fighting system.

Types of Operation: The helicopter must be operated in the restricted categor unless the 275 gallon tank is empty and the hose and pump are detached.

- END-

47.

## Every issue (1)

- May 7, 1993: Issued, Current. [certificate](https://openairdocs.org/files/sha256/8e/d8/8ed83a1d04f494baf11e989b649cd4ad01d43a44b6d8a4395943fd3a4968f770)

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