Service difficulty report · Warning System · Boeing 737990ER

Difficulty date
January 26, 2015
Submitted
January 28, 2015
Operation
Air carrier
Aircraft
N419AS
Make and model
Boeing 737990ER
Aircraft serial
41734
Aircraft time
7,149 hours, 2,296 cycles
Part
Warning System
Condition
False Activation
Location
Autoland
Stage of operation
AP
How discovered
O
Nature of condition
N
Precautionary procedure
O

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

What was found

ACFT WAS ALIGNED WITH THE LT EDGE OF THE RUNWAY DURING AUTOLAND AT APPROXIMATELY 100 FT. RECEIVED APPROACH WARNING AT 50 FT. ACFT GROUNDED. TROUBLESHOT IAW FIM REF 22-11, TASK 825. PERFORMED LAND VERIFY TEST IAW AMM TASK 22-11-00-700-801. TEST PASSED NO FAULTS. GROUND TESTED BOTH NR 1 + NR 2 ILS SYSTEMS BY PROVIDING ILS SIGNAL FROM IFR 4000, NO DEFECTS NOTED WITH NR 1 OR NR 2 SYSTEMS, BOTH LOCALIZER INDICATIONS MATCH AND FOLLOW CORRECTLY.