# SDR ASAA2022050838242

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 8, 2022
- Submitted: May 10, 2022
- Operation: Air carrier
- Aircraft: [N477AS](https://openairdocs.org/aircraft/N477AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40716
- Aircraft time: 24,720 hours, 7,692 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7310 · Engine Fuel Distribution](https://openairdocs.org/jasc/7310)
- Part: Fuel Heater
- Part number: 457311382
- Part serial: YB052967
- Condition: Leaking
- Location: #1 Engine
- Part time: 24,720 hours, 7,692 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/ASAA2022050838242

## Discrepancy

WHILE ACCOMPLISHING #1 ENG HMU AND FUEL SERVO HEATER LEAK CHECK FOUND SERVO FUEL HEATER CAP LEAKING. GROUNDED - YES. REMOVED AND REPLACED #1 ENG SERVO FUEL HEATER IAW B737-900 AMM 73-11-07 THROUGH STEP 3. E. 6. L. #1 ENG SERVO FUEL HEATER INSTALLATION TEST PASSED. NO LEAK. REF AMM 73-11-07.

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