SDR ASAA2020123033792

Service difficulty report · Transceiver · Boeing 737890

Difficulty date: December 30, 2020
Submitted: January 5, 2021
Operation: Air carrier
Aircraft: N557AS
Make and model: Boeing 737890
Aircraft serial: 35176
Aircraft time: 54,175 hours, 15,821 cycles
System (JASC): 2310 · HF Communications System
Part: Transceiver
Condition: Malfunctioned
Location: Nr 1 Hf Comms
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

HF NR 1 DOES NOT TRANSMIT. RECEIVES, CAN HEAR TRANSMITTER CLICK AND SIDE TONE WHILE ATTEMPTING, SELCAL WORKS. GROUNDED-YES. RERACKED NR 1 HF RECEIVER, REF B737-800 AMM 23-11-21-400-801, OPERATIONS NORMAL, REF AMM 23-11-00-730-801. TRANSMIT AND RECEIVED LOUD AND CLEAR. GROUND VERIFICATION CHECKS, SUCCESSFUL.