What it covers
The unit which controls the synchronization of propellers on multi-engine aircraft. Typical parts are synchronizer actuator, computer, synchrophaser, control unit, etc.
Service difficulty reports · 37
Reports filed under 6121, newest first.
| 1995 | 3 |
|---|---|
| 1996 | 3 |
| 1998 | 4 |
| 1999 | 3 |
| 2000 | 7 |
| 2001 | 1 |
| 2002 | 1 |
| 2003 | 4 |
| 2004 | 1 |
| 2006 | 1 |
| 2008 | 2 |
| 2009 | 1 |
| 2010 | 1 |
| 2011 | 2 |
| 2013 | 2 |
| 2025 | 1 |
SDR LR7A2025041303753Synchrophaser · inoperativeDURING SCHEDULED FLIGHT #1 ENGINE RPM FLUX OUT OF LIMITS, ENGINE SHUTDOWN @2205Z IAW QRH / REMOVED AND REPLACED PROP SYNCHROPHASER REF: HAMILTON SUNDSTRAND 5059 CH.2, SECTION IV, OPS CHECK GOOD IAW HN7101. LOG PAGE #53955SDR CA130822009Module · inoperative(CAN) NR 1 ENGINE HAS DRAMATIC RPM FLUCTUATIONS IN ALL BUT THE "OFF" SETTING IN THE SYNC SYSTEM.SDR QMLA2013041713054Screw · missingON FLIGHT, HAD PROPS SYNCED DURING CRUISE, TURNED PROP SYNC SYS ON AND PROPS WENT OUT OF SYNC. TURNED PROP SYNC OFF AND CONTINUED WITH PROPS SYNCED MANUALLY. UPON LANDING MECHANIC FOUND MISSING SCREW OF PROP SYNC SYS.
See all 37 reportsOther codes in chapter 61 · 12
6100Propeller System6110Propeller Assembly6111Propeller Blade Section6112Propeller Deice Boot Section6113Propeller Spinner Section6114Propeller Hub Section6120Propeller Controlling System6122Propeller Governor6123Propeller Feathering/Reversing6130Propeller Braking6140Propeller Indication System6197Propeller/Propulsor System Wiring