# SDR CHIR201306250058

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 25, 2013
- Submitted: June 25, 2013
- Operation: General aviation
- Aircraft: [N191CH](https://openairdocs.org/aircraft/N191CH), registered now
- Make and model: Boeing 1072
- Aircraft serial: 2003
- Engine: Ge CT581402
- System (JASC): [6200 · Main Rotor System](https://openairdocs.org/jasc/6200)
- Part: Sprag Clutch
- Part number: 107DS2111
- Part serial: XBW8061
- Condition: Broken
- Location: Zone 400
- Part time: 402 hours
- Stage of operation: TX
- How discovered: O
- Nature of condition: R
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CHIR201306250058

## Discrepancy

ON STARTUP, AFTER ADVANCING THE ENGINES TO FLIGHT IDLE, DISCOVERED THAT NR 2 ENGINE NF WAS HIGHER THAN NR AND NR 2 ENGINE TORQUE WAS CLOSE TO 0 PERCENT.  WHEN NR 1 ENGINE WAS RETARDED TO GROUND IDLE, WITH NR 2 ENGINE STILL AT FLIGHT IDLE, NR DROPPED AND NR 2 ENGINE WOULD NOT TAKE THE LOAD.  SUSPECT NR 2 SPRAG CLUTCH NOT ENGAGING.  REMOVED TRANSMISSION TO BE SENT TO THE SHOP FOR REPAIR.  WHILE ON WO 148704, NR 2 CLUTCH FELL APART WHEN DISASSEMBLED. BROKEN TABS/CLIPS ON CLUTCH HALVES

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.