# SDR MAC090704

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 1, 2007
- Submitted: September 21, 2007
- Operation: Air carrier
- Aircraft: N923FX
- Make and model: Aerosp ATR 42-300
- Registry model: [Aerosp ATR 42-300](https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-300) (OpenAirDocs)
- Aircraft serial: 135
- Aircraft time: 29,018 hours, 36,386 cycles
- System (JASC): [5751 · Ailerons](https://openairdocs.org/jasc/5751)
- Part: Fitting
- Condition: Cracked
- Location: Aileron
- Component: Aileron, Aerosp
- Component part number: S57610156009
- 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/MAC090704

## Discrepancy

DURING INSPECTION, LEVEL 2 INTERGRANULAR CORROSION AND CRACKS WERE FOUND ON THE CENTER HINGE BEARING FITTING.  THE PART NUMBERS REPLACED ARE:  576106-02 & 576106-01.  REFERENCE ATR 42 CMM 5761-11 AND SRM 57-61-00.

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