# UTC Aerospace Systems Service Information Letter 449

## Copies

OpenAirDocs holds no copy of this document; FAA or NTSB records cite it. Ask UTC Aerospace Systems, a dealer or a repair station for it.

## Details

- Manufacturer: [UTC Aerospace Systems](https://openairdocs.org/service-documents/utc-aerospace-systems.md)
- Type: Service information letter (Service Information Letter)
- Number: 449
- Page: https://openairdocs.org/service-documents/utc-aerospace-systems/sil-449

Also cited in [1 NTSB investigation](https://openairdocs.org/service-documents/utc-aerospace-systems/sil-449/ntsb.md).

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