# STC SH5055NM

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Aerometals, United States
- Description: Installation of Aerometals tailboom, P/N 369X23500-505, 507; or installation of Yehnert tailboom P/N YH-228-X as replacements for MDHI tailboom P/N 369D23500-Y.
- Status date: November 22, 2000
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H3WE](https://openairdocs.org/tcds/H3WE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A1519FDC4A88A68485256CC2005C32BF.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH5055NM

## ADs that name it (2)

- [AD 2002-13-05 R1](https://openairdocs.org/ad/2002-13-05-R1): Tail rotor gearbox · Aerometals tailboom, P/N 369X23500-505, 507 (STC SH5055NM or SH4801NM). Effective Feb 25, 2003. Named in the applicability
- [AD 2002-13-05](https://openairdocs.org/ad/2002-13-05) (historical): Tail rotor gearbox · Modification of tailboom attaching hardware (Aerometals STC SH4801NM or SH5055NM). Effective Aug 1, 2002. Named in the applicability

## Approved models (4)

- MD Helicopter Inc. 369D ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopter Inc. 369E ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopter Inc. 369F ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopter Inc. 369FF ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))

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