Brother HL-6050DN - Manual (Page 147)

6 - 15 TROUBLESHOOTING
JAM DUPLEX (paper jam in the duplex unit)
Follow the instructions below to clear a paper jam:
1
Open the back output tray.
Figure 6-22
2
Use both hands to slowly pull the jammed paper out of the fuser unit.
Figure 6-23
3
Close the back output tray.
If the paper jam cannot be cleared, go to the next step.
JAM DUPLEX