# STC SA4376NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Spoilers Inc, United States
- Description: Installation of Spoilers, Inc. electric/hydraulic operated wing spoiler system.
- Applied: July 20, 1988
- Status date: November 4, 1988
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A25](https://openairdocs.org/tcds/3A25)
- Certificate PDF: https://openairdocs.org/files/sha256/98/5f/985f278cebaef5fb831e45eb35f9b326b96003c08d3d2aa732955ea3cef26b1d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0DF6EDD4D8831B5085256CC2000E3BFC.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4376NM

## ADs that name it (0)

None.

## Approved models (2)

- The Cessna Aircraft Company 340 ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- The Cessna Aircraft Company 340A ([TCDS 3A25](https://openairdocs.org/tcds/3A25))

## 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 SA4376NM This certificate issued to: Spoilers, Inc.

Certifies that the change in the type design for the fellowing product with the limitations and condilions therefor as specified hereon meets the airworthiness reguirements of Purt 3 of the Civil Aviation Regulations: , effective 5/15/56, as Amended by 3-1 through 3-5.

Original Product - Type bertificate Number. 3A25 Make: Cessna Model: 340 and 340A Description of Type Design Change: . Installation of Spoilers, Inc. electric/hydraulic operated wing spoiler system in accordance with Spoilers, Inc. Installation In structions No. SP2000, revised November 4, 1988, or later FAA approved revisions.

Limilalins and bindilions: Approval of this change in type design applies to the above model aircraft only. This approval should not be extended to aircrait of this model 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 upch the airworthiness of that aircraft. A copy of this Certificate, Continuation Sheet a FAA Approved Supplementary Flight Manual dated November 4, 1988, or later FAA approved revision, must be maintained as part or the permanent records for the modiiied aircraf

Date of Application: July 20, 1988 I ate weissned:

Date of Issuance: " November 4, 1988 Date Amended:

FEDERAL AVIATION By Direction of the Administrator ( Signature) TAMINIS RAIS Manager, Seattle Aircraft Certification Office (Title)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number SAA376N1s Limitations and Conditions: (continued) The conditions and limitations of the original Type Certificate No. 3A25 apply except as follows:

This Continuation Sheet, which is part of Supplemental Type Certificate (STC) No. SA4376NM, prescribes the conditions and limitations under which the STC was issued and meets the airworthiness requirements of Civil Air Regulations.

Supplemental Type Certificate HOLDER: Spoilers, Inc.

Cessna model 340 and 340A (Normal Category) as Modified By SIC SA4376NM Equipment: Cessna Pilot's Operating Handbook or AFM and Supplementary Flight Manual for Spoiler System must be maintained in the airplane at all times.

NOTE 1: Current weight and balance report, including list of equipment in the certified empty weight, must be in the aircraft.

NOTE 2: In addition to the Placards and Markings required by Type Certificate Data Sheet 3425, Note 2, apply the following:

(a) The following placard is to be located at the circuit breaker panel:

**SPOILER**

(b) The following placard is to be placed in front of and in full view of the pilot:

SPOILER: OPERATING LIMITATIONS

**SEE AFM SUPPLEMENT IN OWNER'S**

MANUAL OR PILOT'S OPERATING HANDBOOK NOTE 3: With the described Spoiler System installation, performance will be at least equal to or better than that given in the Pilot's Operating Handbook for the Cessna airplane,

- END -

47.

**PAGE 3 OF 3 PAGES FAA AC 82-03578**

## Every issue (1)

- November 4, 1988: Issued, Current. [certificate](https://openairdocs.org/files/sha256/98/5f/985f278cebaef5fb831e45eb35f9b326b96003c08d3d2aa732955ea3cef26b1d)

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