Service difficulty report · Warning System · Boeing 737990ER

Difficulty date
January 24, 2019
Submitted
January 29, 2019
Operation
Air carrier
Aircraft
N474AS
Make and model
Boeing 737990ER
Aircraft serial
40715
Aircraft time
14,197 hours, 4,693 cycles
Part
Warning System
Condition
False Activation
Location
Cockpit
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

ON HYBRID APPR AT 300' RECEIVED APPR WARNING ON HGS. RUNWAY WAS VISUAL. DISENGAGED AUTOPILOT AND LANDED. AIRCRAFT WAS LINED UP ON LEFT RUNWAY EDGE LIGHTS. GROUNDED - YES. ON DEFERRAL. PERFORMED LLM TEST PER LIBRARY GROUP 49 LAND VERIFY REF AMM 22-00-01 SYSTEM OP CHECKS GOOD. THIS CLEARS MEL 22-20B 22-99B AND 22-99C. AIRCRAFT IS AUTOLAND HGS QUALIFIED.