What was found
AFTER DEPARTURE, NR 1 HF RADIO TUNES, BUT IS WEAK AND UNREADABLE AND NR 2 HF RADIO WILL NOT CHANNELIZE OR TUNE. ACFT RETURNED TO PREVIOUS STATION. R & R CAPTAINS AUDIO SELECT PANEL IAW MM 23-50-1. AUDIO SELECTOR PANEL OPS CHECKS NORMAL IAW MM 23-50-0 AND NR 1 HF OPS CHECKS NORMAL IAW MM 23-10-0. R & R NR 2 HF TRANSCEIVER IAW MM 23-10-1 AND OPS CHECKS NORMAL IAW MM 23-10-0 AND 23-21-0. HF RADIO SYS TUNES ON MULTIPLE FREQUENCIES ACROSS BOTH UPPER AND LOWER BANDS. POSITIVE COMMUNICATIONS ESTABLISHED W/SFO ON 6640, 11282 AND 13300.