# STC SA2705NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Heliarc Welding Service Inc., United States
- Description: Installation of replacement exhaust system riser.
- Applied: January 28, 1985
- Status date: March 28, 1985
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A21](https://openairdocs.org/tcds/3A21)
- Certificate PDF: https://openairdocs.org/files/sha256/cf/77/cf77296d7782749296002206d45cff2462a5acd299f63350f0196ac1a8c2d561
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FA6FCDA9CCBDCBE385256CC20008C7A8.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2705NM

## ADs that name it (0)

None.

## Approved models (8)

- Cessna Aircraft Company T210F ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210G ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210H ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210J ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210K ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210L ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210M ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210N ([TCDS 3A21](https://openairdocs.org/tcds/3A21))

## What the certificate says

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

A1244NMDS United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA2705NM This certificate issued to: Heliarc Welding Service, Inc.

P.O. Box 38509 3965 Newport Street Denver, Colorado 80238 Part 3 of the CiVil Air Regulations.

Original Product - Type Bertificate Number: ЗА21 Make: Cessna Model: T210 F, G, H, J, K, L, M, N Descriplion upe Seign emeng exhaust system riser in accordance with FAA sealed Heliarc-Welding Service Top Drawing HWS-206210-4 dated November 7, 1984; FAA approved March 26, 1985; or subsequent approved revisions.

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 interrelationship between this change and any other previously approved modifications will introduce no adverse effect upon the airworthiness of the aircraft.

Date of Application: January 28, 1985 Date Reissued:

Date of Issuance: . March 28, 1985 Date Amended:

EDERAL AVIATION By Direction of the Administrator •oner vic ester conny Manager We fatelles TOMINISTRATO Northwest Mountain Region, Aurora, Colorado Denver Aircraft Certification Office

47.

## Every issue (1)

- March 28, 1985: Issued, Current. [certificate](https://openairdocs.org/files/sha256/cf/77/cf77296d7782749296002206d45cff2462a5acd299f63350f0196ac1a8c2d561)

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