# STC ST222CH

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: ERDA, Inc., United States
- Description: Installation of ERDA seatfone kits, Part Numbers 210016-201, -203, 0-205, and -207, onto PTC Model 901 and 881 Aerolite 1 series aircraft seatbacks,
- Applied: May 3, 1994
- Status date: July 11, 1994
- Product: Aircraft
- Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE)
- Certificate PDF: https://openairdocs.org/files/sha256/91/56/91560a250356fc5412b959b1939259451022eac8c3124d9198ed8dd2b1d8cf39
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID175173091420260831160049.0001
- DRS record last changed: August 31, 2026
- Page: https://openairdocs.org/stc/ST222CH

## ADs that name it (0)

None.

## Approved models (6)

- The Boeing Company DC-9-15 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- The Boeing Company DC-9-31 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- The Boeing Company DC-9-32 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- The Boeing Company DC-9-33F ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- The Boeing Company DC-9-34 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- The Boeing Company DC-9-41 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))

## What the certificate says

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

## Every issue (1)

- July 11, 1994: Issued, Current. [certificate](https://openairdocs.org/files/sha256/91/56/91560a250356fc5412b959b1939259451022eac8c3124d9198ed8dd2b1d8cf39)

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