# SDR ASAA2013021493919

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 14, 2013
- Submitted: February 19, 2013
- Operation: Air carrier
- Aircraft: [N506AS](https://openairdocs.org/aircraft/N506AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35690
- Aircraft time: 17,979 hours, 5,675 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Oil Cooler
- Part number: 1605642
- Part serial: 1087
- Condition: Leaking
- Location: Apu
- Part time: 10,558 hours, 7,388 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2013021493919

## Discrepancy

APU SHUTDOWN.  PERFORMED FIM 49-90, TASK 801, HIGH OIL TEMP SHUTDOWN, FOUND OIL LEAKAGE AT OIL COOLER SUPPLY LINE.  REPLACED APU OIL COOLER IAW AMM 49-91-41.  NO LEAKS NOTED.  PERFORMED APU BITE PROCEDURE IAW AMM 49-60, TASK 801, NO CURRENT FAULTS FOUND AND CDU DOES NOT SHOW MAINTENANCE MESSAGE IN THE LAST APU CYCLE. APU, OPS NORMAL IAW AMM 49-11-00-860-801.  MAINT CONTROL TECH SERVICES, REQUESTS REPLACEMENT OF THE APU SGU SCAVENGE OIL FILTER.  REPLACED SCAVENGE FILTER IAW MM 49-91-12. OPS LEAK CHECKS GOOD.

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