# SDR ASAA2017010119206

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 2017
- Submitted: January 4, 2017
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 40,349 hours, 11,892 cycles
- System (JASC): [2820 · Aircraft Fuel Distribution System](https://openairdocs.org/jasc/2820)
- Part: Drain Mast
- Part number: 346A28015
- Condition: Cracked
- Location: Fuel System
- 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/ASAA2017010119206

## Discrepancy

APU DRAIN MAST HAS EXTENSIVE CRACKING AROUND ROOT FILLET AND DELAMINATION OF THE LEADING EDGE. GROUNDED - YES. REMOVED AND REPLACED DAMAGED APU DRAIN MAST PER REF AMM 28-25-07-020-801 AND 28-25-07-420-801.

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