# SDR ASAA2020091413168

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 11, 2020
- Submitted: September 15, 2020
- Operation: Air carrier
- Aircraft: [N453AS](https://openairdocs.org/aircraft/N453AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36354
- Aircraft time: 25,670 hours, 8,169 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Oil Cooler
- Part number: UA5385513
- Part serial: 11049
- Condition: Leaking
- Location: Nr 1 Engine
- Part time: 25,668 hours, 8,168 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/ASAA2020091413168

## Discrepancy

NR 1 ENG IDG AIR/OIL HEAT EXCHANGER LEAKING.  GROUNDED - YES.  REPLACED THE NR 1 IDG OIL COOLER, LEAK CHECK GOOD, REF B737-900 AMM 24-11-21/401.

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