# STC SE5511NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Bell Helicopter Textron Inc., United States
- Description: Installation of compressor discharge pressue (PC) valve.
- Applied: October 10, 1990
- Status date: May 29, 2013
- Product: Engine
- Certification basis: Part 13, Part 21
- Data sheets: [TCDS E4CE](https://openairdocs.org/tcds/E4CE)
- Certificate PDF: https://openairdocs.org/files/sha256/7a/19/7a198777d60b0e9b859cf78fd8d313933b012951d2224d569cc84d1123f67328
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1542F7E57D153A9486257C1300592E1C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SE5511NM

## ADs that name it (0)

None.

## Approved models (11)

- Rolls-Royce Corporation 250-C20 ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Rolls-Royce Corporation 250-C20B ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Rolls-Royce Corporation 250-C20C (T63-A-720) ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Rolls-Royce Corporation 250-C20F ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Rolls-Royce Corporation 250-C20J ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Rolls-Royce Corporation 250-C20R ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Rolls-Royce Corporation 250-C20R/1 ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Rolls-Royce Corporation 250-C20R/2 ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Rolls-Royce Corporation 250-C20R/4 ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Rolls-Royce Corporation 250-C20S ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Rolls-Royce Corporation 250-C20W ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

N umber SE5511NM This certificate issued to

Part 13 of the Civil Air R egulations .

Original Product -- Type Certificate N umber :

Installation of Aeronautical Accessories, Inc. Compressor Discharge Pressure (Pc) Valve, in accordance with Aeronautical Accessories, Inc. Drawing List AA-92015, dated February 24, 1992, or later FAA approved revision.

The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission. A copy of this STC must be included in the permanent records of the modified engine.

Bell Helicopter Textron, Inc.

441 Industrial Park Road Piney Flats, TN 37686 E4CE M ake : Rolls-Royce Corporation M odel : 250-C20, -C20B, -C20F, -C20J, -C20R, -C20C, -C20S, -C20R/1, -C20R/2, -C20R/4, -C20W Date of application : October 10, 1990

Date of issuance : December 11, 1991

Date reissued : February 19, 1992;

May 29, 2013

Date amended : March 3, 1992, October 5, 1992

B y direction of the A dministrator

(Signature) Scott A. Horn, Acting Manager, Rotorcraft Certification Office, Southwest Region

(Title)

FAA Form 8110-2-1(10-69) Page 2 of 2

## Every issue (1)

- May 29, 2013: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/7a/19/7a198777d60b0e9b859cf78fd8d313933b012951d2224d569cc84d1123f67328)

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