# SDR CHIA2020090624671

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 2, 2020
- Submitted: September 7, 2020
- Operation: Air carrier
- Aircraft: [N239CH](https://openairdocs.org/aircraft/N239CH), registered now
- Make and model: Boeing 234
- Registry model: [Boeing 234](https://openairdocs.org/model/boeing-vertol-234) (OpenAirDocs)
- Aircraft serial: MJ006
- Aircraft time: 32,130 hours
- Engine: Lyc AL5512
- System (JASC): [7600 · Engine Controls](https://openairdocs.org/jasc/7600)
- Part: Control Box
- Part number: BCK121
- Part serial: 035
- Condition: Failed
- Location: Nr 2 Engine N2
- Part time: 2,608 hours
- Stage of operation: DE
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CHIA2020090624671

## Discrepancy

NR 2 ENGINE ROLLBACK ON APPROACH TO WATER SOURCE.  ENGINE SECURED PER EMERGENCY ABNORMAL CHECKLIST.  COULD NOT FIND ANY DEPENDENCY DURING T/S.  REMOVED AND REPLACED NR 2 CONTROL BOX AND ACTUATOR FOR T/S.  ALL SUBSEQUENT CHECKS GOOD AND AIRCRAFT RETURNED TO SERVICE.

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