SDR ASAA2020010331759

Service difficulty report · Radar · Boeing 737890

Difficulty date: January 1, 2020
Submitted: January 3, 2020
Operation: Air carrier
Aircraft: N570AS
Make and model: Boeing 737890
Aircraft serial: 35185
Aircraft time: 48,811 hours, 14,472 cycles
System (JASC): 3442 · Weather Radar System
Part: Radar
Condition: Malfunctioned
Location: Cockpit
Stage of operation: NR
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

RADAR DISPLAY ACCURATELY SHOWS RETURNS - NO FAILURES NOTED. RADAR DISPLAY ALSO SHOWS TWO "PHANTOM RETURNS" AT APPROXIMATELY 10:00 AND 2:00 O'CLOCK POSITION IN BOTH "AUTO" AND OUT OF AUTO MODE. THE TWO PHANTOM RETURNS SHOW UP ON MULTIPLE RANGE SELECTIONS. OTHER THAN THE TWO FALSE PHANTOM RETURNS RADAR + DISPLAY SEEM NORMAL. GROUNDED - YES. PERFORMED BITE PROCEDURE ON WEATHER RADAR SYSTEM AND NO FAULTS NOTED REFB737-800 FIM 34-43 TASK 801. AC OK FOR SERVICE.