# SDR ASAA2018070725308

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 7, 2018
- Submitted: July 9, 2018
- Operation: Air carrier
- Aircraft: [N461AS](https://openairdocs.org/aircraft/N461AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36363
- Aircraft time: 17,149 hours, 5,656 cycles
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Hmu
- Part number: 442653
- Part serial: BECW6455
- Condition: Failed
- Location: Nr 1 Engine
- Part time: 30,213 hours, 10,178 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: X
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018070725308

## Discrepancy

NR 1 ENGINE EXPERIENCED MULTIPLE AUTO SHUTDOWN DURING STARTING PROCEDURES. GROUNDED - YES. ENGINEERING REQUEST - REMOVED AND REPLACED NR 1 ENG FUEL PUMP REF AMM 73-11-01, AND REMOVED AND REPLACED NR 1 ENG HMU. ACCOMPLISHED ENGINE IDLE LEAK CHECK REF AMM 71-00-00-700-801-F00 NO LEAKS NOTED. ACCOMPLISHED ACTUATOR TEST REF AMM 71-00-00-700-807-F00 OPS TEST GOOD. NO EEC FAULTS FOUND AND OBSERVED NO START FAULTS.

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