# SDR CHIA202407167614

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 16, 2024
- Submitted: July 17, 2024
- Operation: Air carrier
- Aircraft: [N235CH](https://openairdocs.org/aircraft/N235CH), registered now
- Make and model: Boeing 234
- Registry model: [Boeing 234](https://openairdocs.org/model/boeing-vertol-234) (OpenAirDocs)
- Aircraft serial: MJ002
- Aircraft time: 9,582 hours
- System (JASC): [7600 · Engine Controls](https://openairdocs.org/jasc/7600)
- Part: Control Box
- Part number: BCK121
- Part serial: 024
- Condition: Activation Error
- Location: #1 Engine
- Stage of operation: TO
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CHIA202407167614

## Discrepancy

SHORTLY AFTER INITIAL TAKE OFF FROM OUA, PILOT NOTED THE #1 ENGINE SOUNDING LIKE IT WAS ROLLING BACK. LOOKING AT THE GAUGES HE FOUND A 35% TORQUE SPLIT BETWEEN THE #1 AND #2 ENGINES. HE THEN PUT THE #1 ENGINE IN MANUAL AND CONTROLLED THE BEEPS FROM THERE. RETURNED THE AIRCRAFT TO BASE WHERE MAINTENANCE TOOK OVER. REMOVED, INSPECTED, CLEANED AND REINSTALLED CANNON PLUGS ON BOTH #1 AND #2 ENGINE N2 ACTUATORS. NO DEFECTS WERE NOTED. PERFORMED A CONTROLS CHECK OF THE N1 AND N2 ACTUATOR AND LOGIC CONTROL BOXES. NO DEFECTS NOTED. PERFORMED A DYNAMIC INSPECTION OF THE N2 LOGIC SYSTEM AND FOUND IT TO BE OUT OF ADJUSTMENT. ADJUSTED #1 AND #2 LOGIC CONTROL BOXES AS NECESSARY. NO FURTHER DEFECTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE.

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