# SDR 98ZZZX3363

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 7, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N457AL](https://openairdocs.org/aircraft/N457AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53151
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Insert
- Condition: Loose
- Location: Gearbox
- Part time: 1,835 hours
- Component: 23063393
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98ZZZX3363

## Discrepancy

UPON VISUAL INSPECTION OF ALL PARTS, FOUND 1 EACH INSERT PULLED OUT AND 2 EACH INSERTS LOOSE AT EXCITER BOX MATING SURFACE ON GEARBOX HOUSING.  ONE EACH INSERT P/N NAS1394-3L PULLED OUT AND 2 EACH INSERTS LOOSE.  POSSIBLY CAUSED BY EXCESSIVE CLEARANCE BETWEEN EXCITER BOX AND GEARBOX CAUSING BOX TO GET HUNG UP OR HIT ON ENGINE REMOVAL.

---
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.