# SDR QMLA2017090617088

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 6, 2017
- Submitted: September 7, 2017
- Operation: Air carrier
- Aircraft: [N530LN](https://openairdocs.org/aircraft/N530LN), registered now
- Make and model: Urocop EC 135 P2
- Registry model: [Urocop EC 135 P2](https://openairdocs.org/model/eurocopter-deutschland-ec-135-p2) (OpenAirDocs)
- Aircraft serial: 0471
- Aircraft time: 3,884 hours, 12,604 cycles
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Gear
- Part number: 4649302041
- Part serial: 1559AND1562
- Condition: Corroded
- Location: M/R Gearbox
- Component: Main Rotor Gear
- Component part number: 4649010010
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QMLA2017090617088

## Discrepancy

AIRCRAFT EXPERIENCED A COCKPIT MGB CHIP LIGHT AFTER ENGINE START AND BEFORE TAKE-OFF.  SERVICEABILITY CHECKS AND MGB OIL FLUSH WAS ACCOMPLISHED AND AIRCRAFT RETURNED TO AIRWORTHY CONDITION AND RELOCATED TO MAINTENANCE FACILITY IAW AMM AND ASB EC135-63A-012. DURING THE POST CHIP EVENT REQUIRED INSPECTIONS OF THE MGB INPUT DRIVE PINION ASSEMBLIES PITTING WAS FOUND ON THE TEETH.

---
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.