SDR ASAA2018080635665

Service difficulty report · Radar · Boeing 737890

Difficulty date: August 3, 2018
Submitted: August 6, 2018
Operation: Air carrier
Aircraft: N587AS
Make and model: Boeing 737890
Aircraft serial: 35684
Aircraft time: 41,303 hours, 12,061 cycles
System (JASC): 3442 · Weather Radar System
Part: Radar
Condition: Malfunctioned
Location: Wx System
Stage of operation: CR
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

AUTO MODE ON RADAR DISPLAYS SIGNIFICANT GROUND CLUTTER AT 85 NM RANGE AND BEYOND. TILT IN AUTO MODE -2 DEGREES AT 37000 AND DOES NOT ADJUST WHEN SELECTING LONGER RANGE. MANUAL MODE AT -1 DEGREE. ELIMINATES GROUND CLUTTER THE DISPLAY IS SAME ON BOTH CAPTAIN`S AND FIRST OFFICER`S N.D. ACFT GROUNDED. PERFORMED A WEATHER RADAR SYS OPS TEST IAW AMM 34-43-00-710-802-001, OPS TESTED GOOD. ALSO PERFORMED A WEATHER RADAR BITE TEST IAW FIM 34-43-00-810-801. NO FAULTS NOTED.