Service difficulty report · Warning System · Boeing 737990ER

Difficulty date
July 2, 2020
Submitted
July 6, 2020
Operation
Air carrier
Aircraft
N493AS
Make and model
Boeing 737990ER
Aircraft serial
41727
Aircraft time
15,936 hours, 5,142 cycles
Part
Warning System
Condition
False Activation
Location
Cockpit
Stage of operation
TX
How discovered
O
Nature of condition
N
Precautionary procedure
D

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

What was found

UPON ACTIVATION WX RADAR FOR DEPARTURE "PWS FAIL" AND "WXR FAIL ANT" RAN WX RADAR TEST, NORMAL REACTIVATED WX RADAR SAME INDICATIONS. GROUNDED - YES. ACCOMPLISHED WEATHER RADAR BITE REF FIM 34-43 TASK 801, NO FAULTS FOUND. ACCOMPLISHED WXR RADAR ANT FAULT ISOLATION REF FIM 34-43 TASK 803, TEST PASSED NORMALLY. WXR RADAR OPS NORMAL.