SDR ASAA11510325

Service difficulty report · Unknown · Boeing 737890

Difficulty date: August 31, 2011
Submitted: September 6, 2011
Operation: Air carrier
Aircraft: N577AS
Make and model: Boeing 737890
Aircraft serial: 35186
Aircraft time: 16,931 hours, 5,119 cycles
System (JASC): 2310 · HF Communications System
Part: Unknown
Condition: Malfunctioned
Location: Hf Comm
Stage of operation: TX
How discovered: O
Nature of condition: J
Precautionary procedure: D

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

What was found

WHEN SELECTING HF31 IN 31 OR 32 RADIO SELECTOR PANEL BOTH ACTIVE AND STANDBY WINDOWS SHOW FAIL. TESTED WITH SFO AIRLINE AND WE ARE ABLE TO TRANSMIT AND RECEIVE ON NR 1 HF AND SELCAL CHECKS GOOD. PER TASK FIM 23 11 00 810 806 PERFORMED PROCEDURE TASK 23 11 00 810 801 BITE SYSTEM OF NR 1 AND NR 2 HF TRANSCEIVERS. FAIL INDICATIONS ON RADIO SELECTOR PANELS ERASED AND SHOWS NORMAL. GROUND VERIFICATION OF NR 1 AND NR 2 HF TRANSCEIVERS CHECK NORMAL.