# STC SA4721NM

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: SynCon Inc, United States
- Description: Installation of SynCon alarm system.
- Applied: December 6, 1988
- Status date: May 8, 1990
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-768](https://openairdocs.org/tcds/A-768), [TCDS 5A2](https://openairdocs.org/tcds/5A2), [TCDS 3A19](https://openairdocs.org/tcds/3A19), [TCDS A-799](https://openairdocs.org/tcds/A-799), [TCDS 3A12](https://openairdocs.org/tcds/3A12), [TCDS 3A17](https://openairdocs.org/tcds/3A17), [TCDS A13CE](https://openairdocs.org/tcds/A13CE), [TCDS A20CE](https://openairdocs.org/tcds/A20CE), [TCDS 5A6](https://openairdocs.org/tcds/5A6), [TCDS 3A13](https://openairdocs.org/tcds/3A13), [TCDS 3A24](https://openairdocs.org/tcds/3A24), [TCDS A9CE](https://openairdocs.org/tcds/A9CE), [TCDS A-790](https://openairdocs.org/tcds/A-790), [TCDS A4CE](https://openairdocs.org/tcds/A4CE), [TCDS A16CE](https://openairdocs.org/tcds/A16CE), [TCDS 3A21](https://openairdocs.org/tcds/3A21), [TCDS 3A10](https://openairdocs.org/tcds/3A10), [TCDS 3A25](https://openairdocs.org/tcds/3A25), [TCDS A7CE](https://openairdocs.org/tcds/A7CE), [TCDS A25CE](https://openairdocs.org/tcds/A25CE) and 16 more
- Certificate PDF: https://openairdocs.org/files/sha256/00/bb/00bb91a2e16f7c87ea54ab36bb96a28485b122675a029fe6c214c139932b087c
- Approved model list and other attachments: [AML_SA4721NM.pdf](https://openairdocs.org/files/sha256/a1/88/a1889b38bb9fdab87a75bbb60ee3057581b47544771737ee6a807d4c6695faaa)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AE8A04158A78EAD185256CC2000E3E2E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4721NM

## ADs that name it (0)

None.

## Approved models (347, first 50)

- Cessna Aircraft Company 120 ([TCDS A-768](https://openairdocs.org/tcds/A-768))
- Cessna Aircraft Company 140 ([TCDS A-768](https://openairdocs.org/tcds/A-768))
- Cessna Aircraft Company 140A ([TCDS 5A2](https://openairdocs.org/tcds/5A2))
- Cessna Aircraft Company 150 ([TCDS 3A19](https://openairdocs.org/tcds/3A19))
- Cessna Aircraft Company 150A ([TCDS 3A19](https://openairdocs.org/tcds/3A19))
- Cessna Aircraft Company 150B ([TCDS 3A19](https://openairdocs.org/tcds/3A19))
- Cessna Aircraft Company 150C ([TCDS 3A19](https://openairdocs.org/tcds/3A19))
- Cessna Aircraft Company 150D ([TCDS 3A19](https://openairdocs.org/tcds/3A19))
- Cessna Aircraft Company 150E ([TCDS 3A19](https://openairdocs.org/tcds/3A19))
- Cessna Aircraft Company 150F ([TCDS 3A19](https://openairdocs.org/tcds/3A19))
- Cessna Aircraft Company 150G ([TCDS 3A19](https://openairdocs.org/tcds/3A19))
- Cessna Aircraft Company 150H ([TCDS 3A19](https://openairdocs.org/tcds/3A19))
- Cessna Aircraft Company 150J ([TCDS 3A19](https://openairdocs.org/tcds/3A19))
- Cessna Aircraft Company 150K ([TCDS 3A19](https://openairdocs.org/tcds/3A19))
- Cessna Aircraft Company 150L ([TCDS 3A19](https://openairdocs.org/tcds/3A19))
- Cessna Aircraft Company 150M ([TCDS 3A19](https://openairdocs.org/tcds/3A19))
- Cessna Aircraft Company 152 ([TCDS 3A19](https://openairdocs.org/tcds/3A19))
- Cessna Aircraft Company 170 ([TCDS A-799](https://openairdocs.org/tcds/A-799))
- Cessna Aircraft Company 170A ([TCDS A-799](https://openairdocs.org/tcds/A-799))
- Cessna Aircraft Company 170B ([TCDS A-799](https://openairdocs.org/tcds/A-799))
- Cessna Aircraft Company 172 ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172A ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172B ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172C ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172D ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172E ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172F (USAF T-41A) ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172G ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172H (USAF T-41A) ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172I ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172K ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172L ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172M ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172N ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172P ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172Q ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172R ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172RG ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Cessna Aircraft Company 172S ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 175 ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Cessna Aircraft Company 175A ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Cessna Aircraft Company 175B ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Cessna Aircraft Company 175C ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Cessna Aircraft Company 177 ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))
- Cessna Aircraft Company 177A ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))
- Cessna Aircraft Company 177B ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))
- Cessna Aircraft Company 177RG ([TCDS A20CE](https://openairdocs.org/tcds/A20CE))
- Cessna Aircraft Company 180 ([TCDS 5A6](https://openairdocs.org/tcds/5A6))
- Cessna Aircraft Company 180A ([TCDS 5A6](https://openairdocs.org/tcds/5A6))
- Cessna Aircraft Company 180B ([TCDS 5A6](https://openairdocs.org/tcds/5A6))

All 347: https://openairdocs.org/stc/SA4721NM/models.md

## 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 SAA721NM This certificate issued to: SYNCON, INC.

Certifies that the change in the type design for the folowing product with the limitalions and conditions therefor as specifud hereon meels the airinthiness reguirements of Port * of the * Regulations Original Product - Type Certificate Number: *See attached Approved Model List (AML) Make: Number: SA4721NM for list of approved airplane models and applicable Model: airworthiness regulations.

Descriplion fLype Designitshange: Installation of Syncon, Inc. Alarm System, Model 100C, on non-pressurized metal structure aircraft, as listed on the FAA Approved Model List (AML) of this SIC, or later FAA approved revisions, in accordance with SynCon Alarm Installation Instructions, Revision 1, dated March 2, 1990.

Limilalins and bendilions: Approval of this change applies to the above model aircraft only. This approval should not be extended to other 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 or other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of rendered, suspended, revoked, or a termination dale is sherwise established by the SIderin is (rater of the Federal Aviation Administration Date of Application: December 6, 1988 Luke missued: April 18, 1990 Date of Issuance: . April 18, 1989 Salesmended: May 8, 1990 FEDERAL AVIATION By Direction of the Administrator Stewart Kelles.

(Signáture) TONIN STRATO Aircraft Certification Office Assistant Manager, Seattle (Title) 47 FAA FORM 8110-2 (10-68)

### AML_SA4721NM.pdf

This is OCR from the scanned FAA attachment. OCR can misread letters and numbers.

AML AMENDMENT DATE 5/8/90 5/8/90 Issue Date: April 18, 1989 AFM SUPPLEMENT NO. AND DATE N/A N/A FAA APPROVED MODEL ITST (AML) NO. SA4721NM SynCon, Inc. Burglar Alarm System FAA SEALED DRAWING/ DRAWING LIST ¡REVISION NO. AND DATE NUMBER | Rev. 1 3/2/90| 100C ¡Rev. 1 3/2/90| 100C 1 of 2 CERTIFICATION BASIS FOR ALTERATION CAR 3, CAR 4a | CAR 4a CAR Part 3 CAR Part 3 CAR Part 3 CAR Part 3 22222 Part ¡CAR ICAR Part ORIGINAL TYPE CERTIFICATE NUMBER A-768 A -768, 5A2 3A19 3А19 A-799 ЗА12, ЗА17 3А17 ЗА13 3A24 A9CE A790 A790 A4CE 3А21 ЗА10 3А25 AIRCRAFT MODEL Series 140 Series| ¡ Series! Series Series! 72 Series| Seriesi rie Se SI Series! Series| Series Seriesi Seriesi Series! 23 Series 24 Series 33 Series Series Series Series 56 Series Series Seriesi Series! 210 Series l 310 Series Series esl riesl 120 150 152 175 177 180 182 185 188 190 195 55 206 207 34 40 AIRCRAFT MAKE Cessna Beech Cessna ITEM

AML AMENDMENT DATE 5/8/90 5/8/90 April 18, 1989 AFM SUPPLEMENT NO. AND DATE N/A N/A 1 x mela Assistant Manager, Seatt Aircraft Certification Ol ST (AML) NO. SA4721NM SynCon, Inc. Burglar Alarm System FAA SEALED DRAWING/ DRAWING LIST ¡REVISION NO. AND DATE NUMBER | Rev. 1 3/2/90| 100C Rev. 1 3/2/90 100C FAA Approved:

of 2 FAA APPROVED MODEL CERTIFICATION BASIS FOR ALTERATION FAR 23, 26, & CAR 3 FAR 23, 26, & CAR 3 I FAR 23, 26, & CAR 3 CAR 3, FAR 23 Page 2a I CAR Part 3 I FAR Part 23 ¡CAR Part 3 IFAR Part 23 ¡CAR Part 3 CAR Part 3 CAR Part 3 CAR Part 3 CAR Part 3 CAR Part 3 CAR Part 3 ICAR Part 3 CAR Part 3 CAR Part 3 I FAR 23 FAR 23 ICAR Part 3

ORIGINAL TYPE CERTIFICATE NUMBER AZCE A25CE AZCE 1A13 1A13 1A13 A16EA 1A8 1A8 1A8 1A8 2A3 A6SW 1A10 1A15 2A13 AIEA A20SO A7SO A18S0 A- 782 AIRCRAFT MODEL 1402 Series Series 1404 Series | 411 | Revo, Inc. |C-1 & C-2 ¡LA-4 Series| ¡Lake 250 [Gulfstream AA-5 Series| 1H250 ¡H295 Series| 1H391 Series! H395 Series 1M20 Series I M22 ¡PA-23Series| ¡PA-24Series| PA-28Series I IPA -30 PA-31Seriesi PA-34Series IPA-33-112 Navion ¡Enterprise Series * DATE: May 8, 1990 AIRCRAFT MAKE Cessna (cont.) Helio ¡ Mooney Piper Thompson ITEM I 00

## Every issue (1)

- May 8, 1990: Amended, Current. [certificate](https://openairdocs.org/files/sha256/00/bb/00bb91a2e16f7c87ea54ab36bb96a28485b122675a029fe6c214c139932b087c), [AML_SA4721NM.pdf](https://openairdocs.org/files/sha256/a1/88/a1889b38bb9fdab87a75bbb60ee3057581b47544771737ee6a807d4c6695faaa)

---
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.