# SDR ASAA2020021422180

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 12, 2020
- Submitted: February 14, 2020
- Operation: Air carrier
- Aircraft: [N478AS](https://openairdocs.org/aircraft/N478AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44105
- Aircraft time: 18,216 hours, 5,893 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Oil Cooler
- Part number: UA5385513
- Part serial: 12848
- Condition: Leaking
- Location: Nr 1 Idg
- Part time: 18,219 hours, 5,894 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/ASAA2020021422180

## Discrepancy

#1 ENG O/B INNER TR SLEEVE SATURATED AND PUDDLED WITH OIL. GROUNDED - YES. FOUND IDG AIR/OIL COOLER TO BE LEAKING. R&R #1 ENG IDG AIR/OIL COOLER PER B737-900 AMM 24-11-21. LEAK CK GOOD.

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