# SDR CMI2003F00000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 20, 2003
- Submitted: April 1, 2003
- Operation: Air carrier
- Aircraft: [N8430N](https://openairdocs.org/aircraft/N8430N), registered now
- Make and model: Cessna 421C
- Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Aircraft serial: 421C0490
- Engine: Cont GTSIO520*
- System (JASC): [7313 · Fuel Injector Nozzle](https://openairdocs.org/jasc/7313)
- Part: B-Nut
- Part number: 641482
- Condition: Undertorqued
- Location: Fuel Injector
- Stage of operation: NR
- How discovered: O
- Nature of condition: R, F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CMI2003F00000

## Discrepancy

NR 2 ENGINE STARTED RUNNING ROUGH.  PILOT LANDED AND HAD PROBLEM CHECKED.  NR 5 CLYINDER FUEL INJECTOR LWE B-NUT WAS LOOSE ON INJECTOR DUE TO IMPROPER TORQUE DURNING MAINTENANCE.

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