What it covers
The gearboxes which transmit engine power to the tail rotor. Includes intermediate gearboxes. Typical parts are case, seal, box, gear, spider gear, gearbox cowling and fairing, etc.
Service difficulty reports · 865
Reports filed under 6520, newest first.
| 1995 | 48 |
|---|---|
| 1996 | 132 |
| 1997 | 105 |
| 1998 | 74 |
| 1999 | 73 |
| 2000 | 27 |
| 2001 | 57 |
| 2002 | 58 |
| 2003 | 71 |
| 2004 | 23 |
| 2005 | 30 |
| 2006 | 10 |
| 2007 | 6 |
| 2008 | 8 |
| 2009 | 5 |
| 2010 | 6 |
| 2011 | 13 |
| 2012 | 21 |
| 2013 | 22 |
| 2014 | 10 |
| 2015 | 6 |
| 2016 | 8 |
| 2017 | 8 |
| 2018 | 6 |
| 2019 | 4 |
| 2020 | 10 |
| 2021 | 5 |
| 2022 | 4 |
| 2023 | 4 |
| 2024 | 2 |
| 2025 | 5 |
| 2026 | 4 |
SDR QMLA2026090620062Gearbox · making metalTRGB CHIP LIGHT. INSPECTED AND CLEANED TGB CHIP DETECTOR. ALL MAINTENANCE COMPLETED.SDR QR9R2026071600001Chip Detector · faultedINTERMITTENT TAIL ROTOR CHIP LIGHT. CAME ON 3X AND REMAINED ON FOR ABOUT 3 TO 4 SECONDS EACH TIME. REMOVED AND REPLACED T/R CHIP DETECTOR; OPERATIONAL CHECK COMPLETED GOOD.SDR QMLA2026060120033Chip Detector · contaminatedUPON LANDING TO TRANSLOAD A PATIENT, THE TGB CHIP LIGHT ILLUMINATED. DUE TO THIS INDICATION AND SUBSEQUENT ENGINE SHUTDOWN, WE WERE UNABLE TO COMPLETE THE TRANSPORT OF THE PATIENT. THE PATIENT WAS THEN MOVED BY AMBULANCE. CHIP DETECTOR CLEANED, FINDINGS INDICA
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