# STC SH2388NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Croman Corporation, United States
- Description: Installation of an Electronics International Digital Temperature Indicator with related thermocouples, adapters and harness to monitor the temperature fo the main gear box bearings.
- Applied: November 10, 1983
- Status date: May 11, 1984
- Product: Aircraft
- Certification basis: Part 21
- Data sheets: [TCDS H2EA](https://openairdocs.org/tcds/H2EA)
- Certificate PDF: https://openairdocs.org/files/sha256/9a/e4/9ae4d0bbd5ad400aa7ca25cb9eec053e9091f32a8aa8d6300025ca879bf822c1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/600EBCE45E48A699862579D600620D7B.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SH2388NM

## ADs that name it (0)

None.

## Approved models (1)

- Sikorsky Aircraft Corporation S-61A ([TCDS H2EA](https://openairdocs.org/tcds/H2EA))

## 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: SH2388NM This certificate issued to: Croman Corporation Purt 21.25 of the Federal Aviation Pregulations:

Original Product - Type bertificate Number: HEA Make: Sikorsky Model: S-6 1A Installation of an Electronics International Digital Temperature Indicator with related thermocouples, adapters and harness to monitor the temperature of the main gear box bearings in accordance with Croman Corporation Drawing No. S61-5000, Sheets l through 4, dated April 22, 1984, or later FAA approved revision. This installation supplements the existing main gear box oil temperature monitoring system.

Limilalions andbendilions: Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation of the Electronics International Digital Temperature Indicating System on Sikorsky Model S-61A Helicopter, Serial Number 61083, R/N N1043T, only. The modified rotorcraft must be operated in accordance with an FAA approved copy of the Rotorcraft Flight Manual dated May 11, 1984, or later FAA approved revision.

A copy of this certificate and the Rotorcraft Flight Manual Supplement must be arried in the rotorcraft at all times May 11, 1984 Date Amended:

FEDERAL AVIATION By digestim of the administraler tomse + Curan (Signature) TAMIN STRATO Acting Manager, Seattle Aircraft Certification Offi (Title)

47.

**FAA FORM B110-2 (10-68)**

## Every issue (1)

- May 11, 1984: Issued, Current. [certificate](https://openairdocs.org/files/sha256/9a/e4/9ae4d0bbd5ad400aa7ca25cb9eec053e9091f32a8aa8d6300025ca879bf822c1)

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