Juniper MX960 Hardware Manual page 507

CAUTION:
to accept the full weight—up to 18 lb (8.2 kg)—as you slide the FPC out of the
chassis.
When the FPC is out of the chassis, do not hold it by the ejector handles, bus
bars, or edge connectors. They cannot support its weight.
Do not stack FPCs on top of one another after removal. Place each one
individually in an electrostatic bag or on its own antistatic mat on a flat, stable
surface.
10. If necessary, remove each installed PIC from the FPC.
11. After you remove each PIC, immediately place it on an antistatic mat or in an electrostatic bag.
12. If you are not reinstalling an FPC into the emptied DPC slots within a short time, install a blank DPC
panel over each slot to maintain proper airflow in the card cage.
CAUTION:
before reinserting it or inserting an FPC into a different slot.
The weight of the FPC is concentrated in the back end. Be prepared
After removing an FPC from the chassis, wait at least 30 seconds
494