# SDR ALGA094364

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 4, 2004
- Submitted: May 4, 2004
- Operation: Air carrier
- Aircraft: XATTF
- Make and model: Bell 412EP
- Registry model: [Bell 412EP](https://openairdocs.org/model/bell-textron-canada-412ep) (OpenAirDocs)
- Aircraft serial: 36273
- Aircraft time: 2,489 hours
- System (JASC): [6230 · Main Rotor Mast/Swashplate](https://openairdocs.org/jasc/6230)
- Part: Mast
- Part number: 412040101129
- Part serial: A386
- Condition: Corroded
- Location: Main Rotor
- Part time: 2,489 hours, 16,454 cycles
- Component: Mast Assy.
- Component part number: 412040366113
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ALGA094364

## Discrepancy

FOUND MAST ASSY. CORRODED IN AREA WHERE BEARING IS SEATED AND INSIDE VALLEY AREA ABOVE BEARING SEAT. CORROSION PITTING BEYOND 412 BHT CR&O LIMITS. SCRAPPED MAST.

---
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.