# SDR ASAA2021040834533

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 8, 2021
- Submitted: April 9, 2021
- Operation: Air carrier
- Aircraft: [N431AS](https://openairdocs.org/aircraft/N431AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43255
- Aircraft time: 27,844 hours, 8,992 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7311 · Engine Fuel/Oil Cooler](https://openairdocs.org/jasc/7311)
- Part: Heat Exchanger
- Part number: 457311382
- Part serial: EM163291
- Condition: Leaking
- Location: Nr 2 Engine Fuel
- Part time: 27,842 hours, 8,991 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/ASAA2021040834533

## Discrepancy

REF LOG PAGE 60093274 DURING REMOVAL AND REPLACEMENT OF FUEL OIL HEAT EXCHANGER FOUND SERVO FUEL HEATER LEAKING ON #2 ENGINE. GROUNDED - YES. REMOVED AND REPLACED SERVO FUEL HEATER PER B737-900 AMM 73-11-07-400-801-F00 AND IDLE POWER LEAK CHECK GOOD PER AMM 71-00-00-700-801-F00.

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