# STC SA554AL

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Ronald E Sullivan, United States
- Description: Installation of third seat in baggage compartment.
- Applied: January 25, 1975
- Status date: May 7, 1979
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A2](https://openairdocs.org/tcds/1A2)
- Certificate PDF: https://openairdocs.org/files/sha256/21/e7/21e73c7cd3b61fe6dac37cc724d991368166f3e35796f7e51c72c665910261da
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/55A543605AE2151985256CC2001229DE.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA554AL

## ADs that name it (0)

None.

## Approved models (1)

- The New Piper Aircraft Inc. PA-18-"150" ([TCDS 1A2](https://openairdocs.org/tcds/1A2))

## What the certificate says

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

## Every issue (1)

- May 7, 1979: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/21/e7/21e73c7cd3b61fe6dac37cc724d991368166f3e35796f7e51c72c665910261da)

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