# SDR ALGA2012020100075

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 2012
- Submitted: February 2, 2012
- Operation: Air carrier
- Aircraft: [N507AL](https://openairdocs.org/aircraft/N507AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53103
- Aircraft time: 10,573 hours
- Engine: Allsn 250C47B
- System (JASC): [6230 · Main Rotor Mast/Swashplate](https://openairdocs.org/jasc/6230)
- Part: Mast
- Part number: 407040038111
- Part serial: N22
- Condition: Corroded
- Location: Main Rotor
- Part time: 2,195 hours
- Component: Mast Assy, Bell
- Component part number: 407040011107FM
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ALGA2012020100075

## Discrepancy

CORROSION FOUND ON TUNGSTEN CARBIDE AREA OF MAST POLE.  SENT TO HELICOPTER FOR EVALUATION IAW ASB 407-11-94 MANUAL.

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