# STC ST9CH

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: ERDA, Inc
- Description: Installation of ERDA rotable seat backs, PN 210004, onto PTC-940 aircraft seats or installation of ERDA Seatfone kit, PN 211003, onto PTC-940 aircraft seats.
- Status date: November 3, 1992
- Data sheets: A6WE
- Certificate PDF: https://openairdocs.org/files/sha256/1f/fd/1ffddbd0868e0530636d40b9c8c9b5d659c26685fd438ff74142a980209cd98c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID164351826520260831154301.0001
- Page: https://openairdocs.org/stc/ST9CH

## ADs that name it

None.

## Approved models (1)

- McDonnell Douglas Corporation MD-88 (TCDS A6WE)

## What the certificate says

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

## Every issue (1)

- November 3, 1992: Issued, Current. [certificate](https://openairdocs.org/files/sha256/1f/fd/1ffddbd0868e0530636d40b9c8c9b5d659c26685fd438ff74142a980209cd98c)

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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.