# STC ST29CH

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Duncan Aviation, United States
- Description: Installation of a Honeywell SPZ-6053 tube EFIS.
- Status date: January 22, 1993
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A10CE](https://openairdocs.org/tcds/A10CE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/82A384C9D682B4A585256CC300035FA9.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST29CH

## ADs that name it (0)

None.

## Approved models (3)

- Learjet Inc. Learjet 55 ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. Learjet 55B ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. Learjet 55C ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))

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