SDR ASAA2015102013483

Service difficulty report · Radar · Boeing 737990ER

Difficulty date: October 20, 2015
Submitted: October 22, 2015
Operation: Air carrier
Aircraft: N469AS
Make and model: Boeing 737990ER
Aircraft serial: 41702
Aircraft time: 4,717 hours, 1,542 cycles
System (JASC): 3442 · Weather Radar System
Part: Radar
Condition: Malfunctioned
Location: Wx Sys
Stage of operation: NR
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

RADAR PERIODICALLY DISPLAYS WEATHER WHERE THERE IS NONE. TYPICALLY IT IS ON THE LEFT SIDE AND DISPLAYS AS A LONG SPIKE WITH VARING LEVELS OF INTENSITY. WHEN WEATHER WAS IN THE AREA, IT DID DISPLAY THAT CORRECTLY. ACFT GROUNDED. ACCOMPLISHED WXR SYSTEM OPS TEST, TEST PASSES NO FAULT MESSAGE. REMOVED WXR R/T. CLEANED BLOWER MOTOR & R/T RACK. REINSTALL WXR R/T. ACCOMPLISH WXR SYS OPS TEST, TEST PASSES. REF MM 34-43-41-400-801 & 34-43-00-710-802-001.