# Service documents: service letters

Manufacturers’ service bulletins, letters and instructions that OpenAirDocs holds a copy of, with their text.

[859 more service documents are cited by FAA but PDFs are unavailable](https://openairdocs.org/service-documents.md?type=service_letter&copy=any)

- [Air Tractor SL 347](https://openairdocs.org/service-documents/air-tractor/sl-347.md): Revision A, Dec 9, 2019 · 3 pages
- [American Champion SL 442](https://openairdocs.org/service-documents/american-champion/sl-442.md): Revision A, Aug 18, 2017 · 3 pages
- [American Champion SL 444](https://openairdocs.org/service-documents/american-champion/sl-444.md): Aug 18, 2017 · 5 pages
- [Aviation Partners Boeing Alert Service Letter APBSL757-0039](https://openairdocs.org/service-documents/aviation-partners-boeing/apbsl757-0039.md): Revision IR, Feb 4, 2026 · 6 pages
- [Beechcraft SL MTL-27-07](https://openairdocs.org/service-documents/beechcraft/mtl27-07.md): Jul 25, 2025 · 10 pages
- [Beechcraft Mandatory Service Letter MTL-57-01](https://openairdocs.org/service-documents/beechcraft/mtl57-01.md): Revision 1, Sep 19, 2018 · 8 pages
- [Bellanca SL 85](https://openairdocs.org/service-documents/bellanca/sl-85.md): Revision B, Apr 8, 2004 · 2 pages
- [Boeing SL 737-SL-71-081](https://openairdocs.org/service-documents/boeing/737-sl-71-081.md): Feb 20, 2023 · 35 pages
- [Boeing SL 787-SL-25-025](https://openairdocs.org/service-documents/boeing/787-sl-25-025.md): Sep 6, 2022 · 7 pages
- [Textron Aviation SL 560-26-02](https://openairdocs.org/service-documents/cessna/sl-560-26-02.md): Revision 1, Jul 31, 2024 · 12 pages
- [Textron Aviation SL 560XL-24-07](https://openairdocs.org/service-documents/cessna/560xl-24-07.md): Jan 13, 2017 · 9 pages
- [Textron Aviation SL 560XL-26-02](https://openairdocs.org/service-documents/cessna/560xl-26-02.md): Revision 1, Jul 31, 2024 · 14 pages
- [Textron Aviation SL 560XL-76-04](https://openairdocs.org/service-documents/cessna/560xl-76-04.md): Revision 1, Nov 24, 2020 · 9 pages
- [Cessna SL 680-53-05](https://openairdocs.org/service-documents/cessna/sl-680-53-05.md): Revision 2, Sep 30, 2015 · 8 pages
- [Cessna Alert Service Letter ASL560XL-53-08](https://openairdocs.org/service-documents/cessna/asl560xl-53-08.md): Jan 21, 2011 · 7 pages
- [Textron Aviation Mandatory Service Letter CQL-57-01](https://openairdocs.org/service-documents/cessna/cql57-01.md): Dec 18, 2017 · 12 pages
- [Cessna Multi-Engine Service Letter MEL-54-01](https://openairdocs.org/service-documents/cessna/mel54-01.md): Mar 20, 2015 · 14 pages
- [Textron Aviation Multi-Engine Mandatory Service Letter MEL-57-01](https://openairdocs.org/service-documents/cessna/mel57-01.md): Dec 18, 2017 · 14 pages
- [Textron Aviation Mandatory Service Letter MTL-57-04](https://openairdocs.org/service-documents/cessna/mtl57-04.md): Revision 1, Mar 27, 2025 · 8 pages
- [Textron Aviation Single Engine Mandatory Service Letter SEL-55-01](https://openairdocs.org/service-documents/cessna/sel55-01.md): Dec 7, 2017 · 9 pages
- [Cessna Single Engine Service Letter SEL-57-01](https://openairdocs.org/service-documents/cessna/sel57-01.md): Revision 1, May 9, 2012 · 10 pages
- [Textron Aviation Mandatory Single Engine Service Letter SEL-57-06](https://openairdocs.org/service-documents/cessna/sel57-06.md): Revision 1, Nov 19, 2019 · 14 pages
- [Textron Aviation SL SEL-57-07](https://openairdocs.org/service-documents/cessna/sel57-07.md): Jun 24, 2019 · 14 pages
- [Textron Aviation Mandatory Single Engine Service Letter SEL-57-08](https://openairdocs.org/service-documents/cessna/sel57-08.md): Revision 1, Nov 19, 2019 · 22 pages
- [M7 Aerospace SL 226-SL-050](https://openairdocs.org/service-documents/m7-aerospace/226-sl-050.md): Apr 15, 2015 · 8 pages
- [Messier-Bugatti-Dowty SL A33-34](https://openairdocs.org/service-documents/safran-landing-systems/a33-34.md): 54 pages
- [Vulcanair Alert Service Letter 23](https://openairdocs.org/service-documents/vulcanair/sl-23.md): Revision 2, Sep 29, 2021 · 4 pages
- [Piper SL 807](https://openairdocs.org/service-documents/piper/sl-807.md): Revision A, Sep 8, 1977 · 1 page
- [Piper SL 1261](https://openairdocs.org/service-documents/piper/sl-1261.md): Jul 19, 2019 · 12 pages
- [Robinson SL 56](https://openairdocs.org/service-documents/robinson/sl-56.md): Revision B, Apr 30, 2010 · 2 pages
- [Robinson SL R44 37](https://openairdocs.org/service-documents/robinson/sl-r44-37.md): Jun 18, 2010 · 2 pages
- [Robinson SL R44 74](https://openairdocs.org/service-documents/robinson/sl-r44-74.md): Revision B, Jul 21, 2017 · 4 pages
- [Simplex Manufacturing SL 2017-017](https://openairdocs.org/service-documents/simplex/sl-2017-017.md): Revision B, Mar 14, 2018 · 6 pages
- [Simplex Manufacturing SL 2017-030](https://openairdocs.org/service-documents/simplex/sl-2017-030.md): 4 pages
- [Viking Air SL DHC3-SL-27-001](https://openairdocs.org/service-documents/viking/dhc3-sl-27-001.md): Oct 25, 2022 · 7 pages
- [Wipaire SL 253](https://openairdocs.org/service-documents/wipaire/sl-253.md): Revision H, Jul 27, 2026 · 15 pages
- [Wipaire SL 277](https://openairdocs.org/service-documents/wipaire/sl-277.md): Revision C, Jul 27, 2026 · 4 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 document_type = 'service_letter'
ORDER BY issuer, number
```

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

---
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.