# STC SA3972NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Gulfstream-California Inc., United States
- Description: Installation of Three Marathon Power Technologies Flite-Tronics 250 VA Static Inverter model number PC-251-1D.
- Applied: November 11, 1988
- Status date: March 16, 2011
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H4SW](https://openairdocs.org/tcds/H4SW)
- Certificate PDF: https://openairdocs.org/files/sha256/05/d6/05d6a24f9bdfc4822687eda01d74a7a63974dfa1ae22a96f3f384818f524e6b3
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F56ECDAA8DF6C90B8625785A0066ECFB.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3972NM

## ADs that name it (0)

None.

## Approved models (1)

- Bell Helicopter Textron 212 ([TCDS H4SW](https://openairdocs.org/tcds/H4SW))

## 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: SA3972NM This Fortificute issueral be Gulfstream-California, Inc.

1501 Aviation Boulevard Lincoln, California 95658 Purt 29 of the Frederal Priation Pregulations.

Original Product Type Fertifiner Nuntier: HASW Make: Bell Helicopter Textron 212 Model:

Description of Type Design Change: Installation of Three Marathon Power Technologies Flite-Tronics 250 VA Static Inverter Model Number PC-251-1D, in accordance with FAA approved WECO INC. Drawing List DL-212-251-1DW, Revision "I.R.", dated January 2, 1989, or later FAA approved revision.

Limitations and Conditions: The installation should not be incorporated in any rotorcraft unless it is determined that the interrelationship between this installation and any previously approved configuration will not introduce any adverse effect upon the airworthiness of the rotorcraft. A copy of this STC must be included in the permanent records of the modified aircraft. 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 that permission.

(Title)

TRANSFER ENDORSEMENT 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):_ Date of Transfer:

Signature of grantor (In ink) _ Page 2 of 2

## Every issue (4)

- March 16, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/05/d6/05d6a24f9bdfc4822687eda01d74a7a63974dfa1ae22a96f3f384818f524e6b3)
- June 27, 2008: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/29/84/29847655b064e439c81de64023b00fbcc3a45497bce5c8be172527471ce961b1)
- February 16, 2007: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/e7/77/e7774f3e0960ec7a836e062bfd0c1cd3b1ff4b1579e0f13959daa016d77d558f)
- February 4, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/6b/50/6b50c63db8d088ebc2d30568bcf648c8c28e0fcc0f5d3f744d893fcddcceb257)

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