ONS 15454 Fan Failure

Hi! We're getting Fan Failure errors popping up on one of my 15454s, and I'm wondering if the fan try is hot swappable? I haven't been able to find any documentation that says yea or nay, and I need to schedule downtime ASAP if it's not. Thanks!

The fan tray is hot-swappable. 
The troubleshooting guide has the procedure for replacing the fan tray.  
http://www.cisco.com/c/en/us/td/docs/optical/15000r9_1/15454/sonet/troubleshooting/guide/454a91ts/454a91_alarmts.html#wp2180469

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