# SDR QMLA2014041614038

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 16, 2014
- Submitted: April 18, 2014
- Operation: Air carrier
- Aircraft: [N546AM](https://openairdocs.org/aircraft/N546AM), registered now
- Make and model: Urocop AS365N3
- Registry model: [Urocop AS365N3](https://openairdocs.org/model/eurocopter-as365n3) (OpenAirDocs)
- Aircraft serial: 4321
- Aircraft time: 3,171 hours, 9,754 cycles
- Engine: Tmeca ARRIEL1D1
- Engine time: 3,171 hours, 6,761 cycles
- System (JASC): [6321 · Main Rotor Brake](https://openairdocs.org/jasc/6321)
- Part: Planetary Gear
- Part number: 350A32108203
- Part serial: L31442
- Condition: Unserviceable
- Location: Main Rotor
- Component: Epicyclic, Urocop
- Component part number: 350A32011000
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QMLA2014041614038

## Discrepancy

DURING A6031RT, MAST INSPECTION, UPON SEPARATION OF THE MAST & MGB, SEVERAL METALLIC FERROUS FLAKES WAS LOCATED ON & AROUND THE EPICYCLICAL REDUCTION GEAR.  AFTER FURTHER INVESTIGATION, 1 OF 5  SATELLITE PLANETARY GEARS PN 350A32-1082-03, SN L31442 OF THE EPICYCLICAL REDUCTION GEAR ASSEMBLY, PN 350A32-0110-00 , SN M6663 WITH 1215+24 HOURS OF TOTAL TIME SINCE INSTALLATION, SHOWS SIGNS OF BEARING WEAR UNUSUAL & OR ABNORMAL AS COMPARED TO THE OTHER 4 SATELLITE PLANETARY GEARS & PREVIOUS EPICYCLICAL ASSEMBLIES INSPECTED IN THE PAST.  DUE TO THE WEAR ON THE SATELLITE PLANETARY GEAR, THE EPICYCLICAL REDUCTION GEAR WAS & HAS BEEN REMOVED FROM SERVICE & BEING ROUTED FOR INSPECTION & REPAIR.  THIS ACFT REMAINS OUT OF SERVICE.

---
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.