# SDR ASAA2017090821868

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 8, 2017
- Submitted: September 11, 2017
- Operation: Air carrier
- Aircraft: [N413AS](https://openairdocs.org/aircraft/N413AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 35205
- Aircraft time: 17,913 hours, 5,828 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Oil Cooler
- Part number: UA5385513
- Part serial: 11312
- Condition: Leaking
- Location: Nr 2 Idg
- Part time: 13,707 hours, 4,498 cycles
- Stage of operation: IN
- How discovered: 9
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017090821868

## Discrepancy

DURING A WALK AROUND, FOUND OIL BEHIND IDG AIR/OIL COOLER IN TR IN NR 2 ENGINE.  ACFT GROUNDED. FOUND THE NR 2 IDG TO BE LOW AND HAD A HISTORY OF EXCESSIVE SERVICING.  REMOVED AND REPLACED NR 2 IDG AIR/OIL COOLER IAW AMM 24-11-21.  OPS  AND LEAK CHECKED GOOD.

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