SDR ASAA2014122510066

Service difficulty report · Radio · Boeing 737890

Difficulty date: December 25, 2014
Submitted: December 29, 2014
Operation: Air carrier
Aircraft: N586AS
Make and model: Boeing 737890
Aircraft serial: 35189
Aircraft time: 27,637 hours, 8,571 cycles
System (JASC): 2310 · HF Communications System
Part: Radio
Condition: Malfunctioned
Location: Nr 1 Hf
Stage of operation: NR
How discovered: 9
Nature of condition: N
Precautionary procedure: O

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

What was found

NR 1 HF RADIO FREQUENCY DISPLAY READS "FAIL/FAIL". RADIO TUNES AND TRANSMIT, RECEIVES NORMAL. AFTER 10 SECONDS FAIL WARNING APPEARS. ACFT GROUNDED. RESET NR 1 HF AND NR 2 HF, PERFORMED BITE CHECK PROCEDURE. NO FAULTS NOTED, NO FAIL INDICATED, REF AMM FIM TASK 23-11, TASK 801.