As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE EPR INDICATOR DID NOT GIVE ACCEPTABLE READINGS. THE TAKEOFF WAS ABORTED AND THE AIRCRAFT RETURNED TO THE GATE. FOUND FROZEN MOISTURE IN THE PT7 LINE. REMOVED LINE, CLEARED BLOCKAGE, AND REINSTALLED LINE. RAN ENGINE. SYSTEM OPERATION WAS NORMAL. AIRCRAFT RETURNED TO SERVICE.