# SDR ASAA2020081833039

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 18, 2020
- Submitted: August 19, 2020
- Operation: Air carrier
- Aircraft: [N513AS](https://openairdocs.org/aircraft/N513AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35192
- Aircraft time: 43,951 hours, 13,029 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Oil Cooler
- Part number: UA5385513
- Part serial: 1774
- Condition: Leaking
- Location: Nr 2 Idg
- Part time: 69,504 hours, 24,949 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020081833039

## Discrepancy

NR 2 ENGINE HAS REPORTS OF EXCESS OIL ADDED AFTER 15 MINUTE IDLE RUN WHILE AIRCRAFT IS IN ACTIVE STORAGE.  PREVIOUS MAINTENANCE ACCOMPLISHED FOR SIMILAR REPORT: ANTI LEAK VALVE REPLACED, LUBE MODULE REPLACED, GEARBOX CHECKED FOR OIL HIDING.  GROUNDED - YES.  BORO FOUND NO DEFECTS.  FOUND OIL COOLER LEAKING, REF B737-800 AMM 79-00-00, 72-00-00.  REMOVED AND REPLACED NR 2 ENG AIR/OIL COOLER.  LEAK CHECKS GOOD, REF B737-800 MM 24-11-21-000-801, 24-11-21-400-801.  PERFORMED LEAK CHECK OF NR 2 ENG DRIVE PAD, REF B737-800 AMM 71-00-00, LEAK CHECK GOOD.

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