As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HF 2 WOULD NOT TRANSMIT OR RECEIVE IN VOICE WHEN KEYING MIC IT WOULD NOT BREAK SQUELCH WITH EITHER CAPT OR F/O. EVENTUALLY HF 2 STARTED WORKING NORMALLY. SUSPECT HF 2 WAS STUCK IN DATA MODE. PERFORMED HF SYS TEST REF AMM 23 11 00 730 801. HF2 OPS CK NORMAL. NO HISTORY LAST 30 DAYS.