SDR ASAA2019020328034

Service difficulty report · Hf Comm · Boeing 737890

Difficulty date: February 3, 2019
Submitted: February 6, 2019
Operation: Air carrier
Aircraft: N579AS
Make and model: Boeing 737890
Aircraft serial: 35187
Aircraft time: 45,314 hours, 13,465 cycles
System (JASC): 2310 · HF Communications System
Part: Hf Comm
Condition: Malfunctioned
Location: Cockpit
Stage of operation: CR
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

HF RADIO PARTIAL FAIL- HF RADIO NR 1 UNABLE TO TRANSMIT SIDE TONE CONTINUOUS FOR AN HOUR. GROUNDED - YES. PERFORMED FIM 23-11 TASK 801 NR 1 AND NR 2 HF TASKS. PERFORMED HF COM SYSTEM TEST PER FIM 23-11 TASK 806. OPS CHECK NORMAL, NO DEFECTS NOTED.