# STC SA4365NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Helicoptor Maintenance Corporation, United States
- Description: Installation of a landing gear warning horn silencer.
- Applied: March 3, 1988
- Status date: October 14, 1988
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A23CE](https://openairdocs.org/tcds/A23CE)
- Certificate PDF: https://openairdocs.org/files/sha256/2b/ba/2bbaa278e0fc27bbb998f3eeb2680039fb6315519d623aabebf7a6bf438dc342
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F4FABDCB01304B3285256CC2000E3BDF.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4365NM

## ADs that name it (0)

None.

## Approved models (4)

- Hawker Beechcraft Corporation 58P ([TCDS A23CE](https://openairdocs.org/tcds/A23CE))
- Hawker Beechcraft Corporation 58PA ([TCDS A23CE](https://openairdocs.org/tcds/A23CE))
- Hawker Beechcraft Corporation 58TC ([TCDS A23CE](https://openairdocs.org/tcds/A23CE))
- Hawker Beechcraft Corporation 58TCA ([TCDS A23CE](https://openairdocs.org/tcds/A23CE))

## 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 S14365M This certificate issued to: Helicopter Maintenance Corporation Part 23 of the Federal Aviation Regulations: Data Sheet A23CE for Equivalent Safety Findings. effective 2/1/65, and Amendments 23-1 through 23-12. See Type Certificate Original Product -Typebertificale Number: A23CE Make: Beech Model: 58P, 58PA, 58TC and 58TCA Description of Type Design Change: Installation of a landing gear warning horn silencer in accordance with Helicopter Maintenance Corporation Installation Instructions No. GHS-2 dated June 1, 1988, amended October 12, 1988, or later FAA approved revisions.

Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only. This approval should not be extended to aircraft of this model on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate, Continuation Sheet and FAA Flight Manual Supplement dated October 14, 1988, or later FAA approved revision, must be maintained as part of the permanent records for the modiiied aircrait

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA1365NM Limitations and Conditions: (continued) This warning horn silencer may only be installed by Helicopter Maintenance Corporation of Boise, Idaho, or by any facility designated by Helicopter Maintenance Corporation to perform the installation.

2. The following placards must be installed within clear view of the pilot:

a. Above the warning horn silencer switch:

**GEAR HORN**

b. Below the warning horn silencer switch:

**PUSH TO SILENCE**

- END -

**FAA FORM B110-2-1 (10-69) PAGE 3 OF 3 PAGES**

## Every issue (1)

- October 14, 1988: Issued, Current. [certificate](https://openairdocs.org/files/sha256/2b/ba/2bbaa278e0fc27bbb998f3eeb2680039fb6315519d623aabebf7a6bf438dc342)

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