Is an SPC card failure graceful?

Dear all,

Just wondering if anyone has any experience of an SPC card failure in a high end (3400) standalone SRX?

Just wondering if the effect is essentially reduced capacity until the card is replaced, or, as these units are cold-swappable only, whether it results in the platform stopping, until it can be rebooted without the SPC...

Anybody had this happen to them and can share the experience?

Thanks in advance!