As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 HF RADIO DISPLAYS FAIL. CYCLED NR 1 HF PWR. DISPLAY & RADIO OPERATION RETURNED TO NORMAL. HOWEVER NR 1 HF BITE CHECK FAIL. KEY INTERLOCK LED WOULD NOT ILLUMINATE FOR 1 TO 3 SECONDS. REMOVED & REPLACED NR 1 HF TRANSCEIVER. OP CHECK NORMAL. REF MM 23 11 21 000 801 23 11 21 400 801 & FIM 23 11 00 810 801.