# STC SH4507NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Los Angeles County Sheriff's Department Aero Bureau, United States
- Description: Approval for takeoffs and landings up to and including 12,000 feet densiy altitude is authorized.
- Applied: March 24, 1988
- Status date: September 22, 1988
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS 1H11](https://openairdocs.org/tcds/1H11)
- Certificate PDF: https://openairdocs.org/files/sha256/08/5c/085c6a17d5cd4a74113ef28f2d1f7a866076564b78ece1ccd744e7b429edca2a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5A2F1E537837C9F68625760900409DE3.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH4507NM

## ADs that name it (0)

None.

## Approved models (6)

- Sikorsky Aircraft Corporation S-58BT ([TCDS 1H11](https://openairdocs.org/tcds/1H11))
- Sikorsky Aircraft Corporation S-58DT ([TCDS 1H11](https://openairdocs.org/tcds/1H11))
- Sikorsky Aircraft Corporation S-58ET ([TCDS 1H11](https://openairdocs.org/tcds/1H11))
- Sikorsky Aircraft Corporation S-58FT ([TCDS 1H11](https://openairdocs.org/tcds/1H11))
- Sikorsky Aircraft Corporation S-58HT ([TCDS 1H11](https://openairdocs.org/tcds/1H11))
- Sikorsky Aircraft Corporation S-58JT ([TCDS 1H11](https://openairdocs.org/tcds/1H11))

## 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: SH4507NM This certificate issued to: Los Angeles County Sheriff's Department, Aero Bureau Part 6* of the CiVIT Air Regulalions. *Certification basis is set forth in T.C. Data Sheet 1H11, Rev. 16.

Original Product - Type Certificate Number: 1H11 Make: Sikorsky Model: S-58BT, S-58DT, S-58ET, S-58FT, S-58HT, S-58JT Description of Type Design Change:

Approval for takeoffs and landings up to and including 12,000 feet density altitude is authorized in accordance with L.A. County Sheriff's Department, Aero Bureau, FAA Approved Rotorcraft Flight Manual, Supplement No. 1, dated September 20, 1988, or later FAA approved revision.

Limitations and Conditions: Limited to the PT6T-3 and -6 engine installations only (Configuration II) for the models listed above. This approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. This determination should include consideration of significant changes a weight distribution such as an increase in the fixed disposable weight of tr

Date of Application: March 24, 1988 Date Reissued:

Date of Issuance: . September 22, 1988 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Manager, Los Angeles Aircraft TO MINISTRATO Certification Cffice (Title)

47.

FAA FoR 8110-2 (10-68)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number SH4507NM Limitations and Conditions: (continued) fuselage.

Limitations and Conditions: of Type Certification 1H1l apply except as outlined below:

FLIGHT LIMITATIONS:

1. Figure l must be used to determine the maximum allowable gross weight for takeoff and landing above 6500 feet density altitude.

2. The maximum density altitude for takeoff and landing is 12,000 feet.

3. Maintain a minimum of 93% NR during takeoff and landing above 8000 feet density altitude.

4. Takeoff and landings above 8000 feet density altitude approved with the Pratt and Whitney PT6T-3 and PT6T-6 engines installed only. (Refer to appropriate limitations and performance information.)

**FAA FORM 8110-2-1 (10-69) PAGE 3OF4 PAGES**

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SH4507 M

GROSS WEIGHT vs. DENSITY ALTITUDE I O001 ONLINE ALISNE PT6T-6 - PT61-3 12 13 GROSS WEIGHT 1.000 Lbs.

**FIGURE 1**

47.

## Every issue (1)

- September 22, 1988: Issued, Current. [certificate](https://openairdocs.org/files/sha256/08/5c/085c6a17d5cd4a74113ef28f2d1f7a866076564b78ece1ccd744e7b429edca2a)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.