SDR ASAA201904018823

Service difficulty report · Hf Comm · Boeing 737890

Difficulty date: March 31, 2019
Submitted: April 1, 2019
Operation: Air carrier
Aircraft: N518AS
Make and model: Boeing 737890
Aircraft serial: 35693
Aircraft time: 38,943 hours, 11,605 cycles
System (JASC): 2310 · HF Communications System
Part: Hf Comm
Condition: Malfunctioned
Location: Nr 1
Stage of operation: NR
How discovered: 9
Nature of condition: O
Precautionary procedure: O

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

What was found

#1 HF WILL NOT TRANSMIT. GROUNDED - YES. RESET C/B PER B737-800 AMM 20-60-01. PERFORMED HF COMMUNICATION SYSTEM BITE PROCEDURE PER B737-800 FIM 23-11-TASK 801, BITE TEST GOOD NO FAULTS, OPS CHECK HF TRANSCEIVER OPS TEST GOOD OK FOR SERVICE, GROUND VERIFICATION, TEST GOOD.