SDR ASAA2021042734687

Service difficulty report · Display · Boeing 737990ER

Difficulty date: April 27, 2021
Submitted: April 29, 2021
Operation: Air carrier
Aircraft: N472AS
Make and model: Boeing 737990ER
Aircraft serial: 60580
Aircraft time: 22,603 hours, 7,122 cycles
System (JASC): 2310 · HF Communications System
Part: Display
Condition: False Indication
Location: Nr 2 Hf Radio
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

HF RADIO #2 DISPLAYS FAIL IN BOTH WINDOWS ON THE RTP. GROUNDED - YES. PERFORMED HF SYSTEM BITE PROCEDURES, NO FAULT FOUND REFERENCE B737-900 FIM 23-11-TASK 801, PERFORMED TRANSCEIVER RESET #2 FAIL, FAIL MSG WENT AWAY. PERFORMED HF OPS TEST, WITH NO DEFECTS NOTED, REF B737-900 AMM 23-11-00-710-801.