# STC SA108RM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Heliarc Welding Service Inc.
- Description: Modify exhaust stacks by replacing existing bellows or seal type joints with a clampless, sealess type slip joint.
- Status date: December 14, 1977
- Data sheets: A7CE, A7CE, A7CE, A7CE, A7CE
- Certificate PDF: https://openairdocs.org/files/sha256/61/71/6171c50c2bdbab9cd88778003bace3cb32eab490536f3aabed6f821b82444103
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F01FD736D99D3EF385256CC10080DDBF.0001
- Page: https://openairdocs.org/stc/SA108RM

## ADs that name it

None.

## Approved models (5)

- Cessna Aircraft Company 411 (TCDS A7CE)
- Cessna Aircraft Company 411A (TCDS A7CE)
- Cessna Aircraft Company 421 (TCDS A7CE)
- Cessna Aircraft Company 421A (TCDS A7CE)
- Cessna Aircraft Company 421B (TCDS A7CE)

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- December 14, 1977: Issued, Current. [certificate](https://openairdocs.org/files/sha256/61/71/6171c50c2bdbab9cd88778003bace3cb32eab490536f3aabed6f821b82444103)

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From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.