# SDR ASAA2021111136604

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 11, 2021
- Submitted: November 24, 2021
- Operation: Air carrier
- Aircraft: [N533AS](https://openairdocs.org/aircraft/N533AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35201
- Aircraft time: 40,010 hours, 11,574 cycles
- System (JASC): [7920 · Engine Oil Distribution (Airframe Furnished)](https://openairdocs.org/jasc/7920)
- Part: Heat Exchanger
- Part number: 453328039
- Part serial: YB040648
- Condition: Leaking
- Location: Nr 1 Engine
- Stage of operation: NR
- 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/ASAA2021111136604

## Discrepancy

REF LOGPAGE 60234967 ENGINE #1 OIL/FILTER HEAT EXCHANGER PAD DRAINS LEAKING 17 DROPS PER MIN. GROUNDED - YES. REMOVED AND REPLACED MAIN OIL/FUEL HEAT EXCHANGER @ ENGINE #1 REF B737-800 MM 79-21-02-400-801-F00. REMOVED AND REPLACED SERVO FUEL HEATER @ ENGINE #1 REF AMM 73-11-07-400-801-F00. LEAK AND OPS CHECK OK.

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