# SDR CALA2026062417313

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 19, 2026
- Submitted: June 24, 2026
- Operation: Air carrier
- Aircraft: [N78009](https://openairdocs.org/aircraft/N78009), registered now
- Make and model: Boeing 777224
- Aircraft serial: 29479
- Aircraft time: 127,737 hours, 13,096 cycles
- Engine: Ge GE9090B
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Hmu
- Part number: 8061689
- Part serial: 5424
- Condition: Faulted
- Location: Nr 2 Engine
- Part time: 49,694 hours, 4,747 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026062417313

## Discrepancy

RIGHT ENGINE COMPRESSOR STALLED ON ROTATION NO EXCEEDENCES. PERFORMED FAULT ISOLATION NR 2 ENG IAW FIM 71-05, TASK 807, STEPS A - E,  NO DEFECTS NOTED.  NR 2 ENGINE BORESCOPE PLUGS REMOVAL & INSTALL CONTINUED FAULT ISOLATION PROCEDURE ON FIM 71-05, TASK 807, STEP E (1) THRU (B) 2), ENG CONTROL RT OR  ENG EEC C1 R MESSAGES NOT PRESENT. ALSO ON EXISTING SCHEDULED MAINTENANCE TASK SCREEN ENG EEC C2 R MSG NOT PRESENT. CONTINUED FAULT ISOLATION PROCEDURE ON FIM 71-05 TASK 807 - STEP E.(2).  IP CHECK VALVE FOUND TO BE SERVICABLE. R & R NR 2 ENGINE HMU. CONTINUED WITH FIM 71-05 TASK 807 FROM STEP E.(6)(A).  NO STATUS OR MX MESSAGES PRESENT. R & R NR 2 ENGINE HMU IAW AMM UP TO AND INCLUDING STEP. I. (11)(G)1). .

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