# STC SR00875AT-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: MASCO Service Corp, United States
- Description: Installation and operation of a dual Litef LCR-92, Dual Fiber Optic Gyro Attitude Heading Reference System(AHRS) installed.
- Status date: April 18, 1997
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H4SW](https://openairdocs.org/tcds/H4SW)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5E05F7E4F67D980485256CC200622649.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR00875AT-D

## ADs that name it (0)

None.

## Approved models (2)

- Bell Helicopter Textron 212 ([TCDS H4SW](https://openairdocs.org/tcds/H4SW))
- Bell Helicopter Textron 412 ([TCDS H4SW](https://openairdocs.org/tcds/H4SW))

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