# SDR UIEA2017020800162

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 7, 2017
- Submitted: February 8, 2017
- Operation: Air carrier
- Aircraft: [N412MC](https://openairdocs.org/aircraft/N412MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 30559
- Aircraft time: 69,575 hours, 10,999 cycles
- System (JASC): [3830 · Waste Disposal System](https://openairdocs.org/jasc/3830)
- Part: Mast
- Part number: 8921270G2
- Part serial: UID00890
- Condition: Corroded
- Location: Potable Water
- 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/UIEA2017020800162

## Discrepancy

CORROSION ON FUSELAGE LT LOWER SIDE MAST AND COVER POTABLE WATER SYSTEM.   REPLACED THE DRAIN MAST IAW AMM 38-31-61-004-002 REV 88 AND AMM 38-31-61-404-013 REV 88. PERFORMED A TEST OF  DRAIN MAST  IAW AMM 38-31-61-404-013 REV 88.

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