# SDR ASAA2021071335380

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 13, 2021
- Submitted: July 15, 2021
- Operation: Air carrier
- Aircraft: [N491AS](https://openairdocs.org/aircraft/N491AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44109
- Aircraft time: 20,888 hours, 6,681 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Hmu
- Part number: 1853M56P16
- Part serial: BECWD310
- Condition: Faulty
- Location: #2 Engine
- Part time: 20,888 hours, 6,681 cycles
- Stage of operation: TX
- How discovered: V
- Nature of condition: M
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021071335380

## Discrepancy

ENG #2 OVERTEMP ON STARTUP, RED BOX ILLUMINATED ABORTED START. GROUNDED - YES. REF LOG 60230329 FOR ENG INSP. AFTER ENG OPERATION ABOVE THE LIMITS AND HIGH STRESS . NO DEFECTS NOTED. ACCOMP B737-900 FIM 80-05 TASK 807 STEPS A THROUGH E , NO FAULTS FOUND . ACCOMP FIM TASK 80-05 TASK 802 STEPS A THROUGH E 6 NO FAULTS FOUND. REMOVED AND REPLACED HMU ON #2 ENG. REF T/C N8473000 AND N8473001 ALL ITEMS ON MIG 2C-40-0043974 CLOSED ETOPS PN VERIFICATION COMPLETED AND VERIFIED APPLICABILITY, THIS CLEARS THE MCT SEAMC MARK NOTIFIED.

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