SDR ASAA2020112433590

Service difficulty report · Hf Comm · Boeing 737890

Difficulty date: November 24, 2020
Submitted: December 1, 2020
Operation: Air carrier
Aircraft: N557AS
Make and model: Boeing 737890
Aircraft serial: 35176
Aircraft time: 53,828 hours, 15,734 cycles
System (JASC): 2310 · HF Communications System
Part: Hf Comm
Condition: Malfunctioned
Location: Nr 1
Stage of operation: NR
How discovered: O
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

NR 1 HF DOES NOT TRANSMIT ON EITHER CAPTAIN OR F/O SIDE. GROUNDED-YES. RESOLVED ON W/O: 1853473 TASKCARD: N/R-00002. PERFORMED B737-800 FIM 23-11 TASK 806 INITIAL EVALUATION GOOD. HF1 AND HF 2 OPERATIONS GOOD A/C TO A/C ON BOTH CAPT'S AND F/O'S SIDE. OPERATIONAL LRU BITE TEST AND SYSTEM TEST GOOD, REF B737-800 MM 23-11-00. NO HISTORY LAST 90 DAYS PLUS. GROUND VERIFICATION TEST GOOD. THIS CLEARS MEL 23-11A, PLC C/N25006557 REMOVED. SEAMC NOT. JAKE.