# SDR ASAA2021111736679

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 17, 2021
- Submitted: December 1, 2021
- Operation: Air carrier
- Aircraft: [N457AS](https://openairdocs.org/aircraft/N457AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36355
- Aircraft time: 28,317 hours, 9,108 cycles
- System (JASC): [7920 · Engine Oil Distribution (Airframe Furnished)](https://openairdocs.org/jasc/7920)
- Part: Exchanger
- Part number: 453328039
- Part serial: YB044055
- Condition: Inoperative
- Location: Nr 2 Eng
- Stage of operation: IN
- 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/ASAA2021111736679

## Discrepancy

DURING PREP FOR TOW FOUND #2 ENG MAIN OIL/FUEL HEAT EXCHANGER PAD DRAIN DRIPPING FUEL. GROUNDED - YES. REMOVED AND REPLACED OIL/FUEL HEAT EXCHANGER AND SERVO FUEL HEATER. REF B737-900 AMM 79-21-02 AND 73-11-07. OPS & LK CHECK GOOD.

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