# SDR ASAA2019021828216

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 18, 2019
- Submitted: February 20, 2019
- Operation: Air carrier
- Aircraft: [N527AS](https://openairdocs.org/aircraft/N527AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35694
- Aircraft time: 35,301 hours, 12,006 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Apu
- Part number: 38007021
- Part serial: P8133
- Condition: Leaking
- Location: Apu Bay
- Part time: 9,126 hours, 18,345 cycles
- Stage of operation: DE
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019021828216

## Discrepancy

STRONG DIRTY SOCK SMELL ON DESCENT THROUGHOUT THE AIRCRAFT. GROUNDED - YES. FOUND OIL IN APU LOAD COMPRESSOR CASE DRAIN REF AMM 49-16-11-200-801 & FIM TASK 05-51- TASK 814. REMOVED AND REPLACED APU. REMOVED AND REPLACED RECIRCULATION AIR FILTERS. REF AMM 21-25-01. ACCOMPLISHED BURNOUT OF APU AND BOTH ENGINE PNEUMATIC DUCTS. REF AMM 21-00-01. NO FURTHER ODORS PRESENT AFTER ACCOMPLISHMENT OF FIM 21-00 TASK 806 REPAIR CONFIRMATION. AIRCRAFT RETURNED TO SERVICE.

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