# SDR ASAA2023082444753

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 24, 2023
- Submitted: August 25, 2023
- Operation: Air carrier
- Aircraft: [N478AS](https://openairdocs.org/aircraft/N478AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44105
- Aircraft time: 30,050 hours, 9,462 cycles
- System (JASC): [7310 · Engine Fuel Distribution](https://openairdocs.org/jasc/7310)
- Part: Heater
- Part number: 457311382
- Part serial: YB053322
- Condition: Leaking
- Location: #1 Engine
- Part time: 30,044 hours, 9,461 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/ASAA2023082444753

## Discrepancy

WHILE PERFORMING IDLE POWER LEAK CHECK ON #1 ENG FOUND FULE LEAK AT TOP BACK SIDE OF THE FUEL HEATER SERVO. GROUNDED - YES. REMOVED & REPLACED #1 ENG SERVO FUEL HEATER REF MM 73-11-07. LEAK CHECKED GOOD.

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