# Zodiac service documents: service information letters

10 service documents from Zodiac that OpenAirDocs holds a copy of, by type and number, with their text.

[1 more Zodiac service document is cited by FAA but PDFs are unavailable](https://openairdocs.org/service-documents/zodiac.md?type=service_information_letter&copy=any)

## Service Information Letter

- [537-01](https://openairdocs.org/service-documents/zodiac/sil-537-01.md): Jul 31, 2015 · 8 pages

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT document_id, issuer, type_label, number, title, latest_revision, latest_revision_date, has_file
FROM 'https://openairdocs.org/data/latest/service_document.parquet'
WHERE issuer_kind <> 'authority'
  AND has_file
  AND issuer_key = 'zodiac'
  AND document_type = 'service_information_letter'
ORDER BY type_label, number
```

This list as a web page: https://openairdocs.org/service-documents/zodiac?type=service_information_letter

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OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.