SDR IPXA2020081098806

Service difficulty report · Hf Comm · Boeing 7478F

Difficulty date: August 9, 2020
Submitted: August 10, 2020
Operation: Air carrier
Aircraft: N613UP
Make and model: Boeing 7478F
Aircraft serial: 64259
Aircraft time: 6,962 hours, 1,000 cycles
System (JASC): 2310 · HF Communications System
Part: Hf Comm
Condition: Inoperative
Location: Left
Stage of operation: CR
How discovered: 9
Nature of condition: O
Precautionary procedure: A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

LEFT HF WILL NOT TRANSMIT CAUSED AIR TURNBACK.A/C UPON ARRIVED BOTH HF SYS FAULT REVIEW, PRESENT LEG FAULT AND FAULT HISTORY NO FAULT FOUND, ONLY UPPER EICAS RADIO TRANSMIT ADVISORY MSG DISPLAYED. T/S PER FIM 23-11-803 AND 804 AND 23-50-00-810-847 RESET OF THE EIU CB, ON CMC BOTH HF SYS TEST PASSED. SEOUL RADIO FQ8.903 CONTACT BOTH HF SYS

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