SDR ASAA2017080621553

Service difficulty report · Hf Comm · Boeing 737890

Difficulty date: August 6, 2017
Submitted: August 8, 2017
Operation: Air carrier
Aircraft: N530AS
Make and model: Boeing 737890
Aircraft serial: 36578
Aircraft time: 28,594 hours, 8,521 cycles
System (JASC): 2310 · HF Communications System
Part: Hf Comm
Condition: Malfunctioned
Location: Nr 2
Stage of operation: TX
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

DURING PREFLIGHT, THE HF 2 SELECTED BOTH ACTIVE AND STANDBY FREQUENCIES SHOWING FAILED WITH NO SIDE TONE OVER SPEAKER. ACFT GROUNDED. PERFORMED FIM 23-11, TASK 803. HF 2 BITE TESTED OK, IAW FIM 23-11, TASK 801. INTERMITTENT FAULT IAW FIM. GROUND VERIFICATION TESTED OK.