SDR ASAA2016112818873

Service difficulty report · Autoland Sys · Boeing 737990ER

Difficulty date: November 28, 2016
Submitted: November 30, 2016
Operation: Air carrier
Aircraft: N459AS
Make and model: Boeing 737990ER
Aircraft serial: 36352
Aircraft time: 10,814 hours, 3,542 cycles
System (JASC): 2210 · Autopilot System
Part: Autoland Sys
Condition: Malfunctioned
Stage of operation: AP
How discovered: 9
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

AUTOLAND UNSUCCESSFUL. (HGS MONITOR FUNCTIONED PROPERLY. AIRCRAFT LINED UP APPROXIMATELY 20 FT RIGHT OF CENTERLINE, BEGAN CORRECTING ABOUT 100 FT ABOVE FIELD ELEVATION. TOUCHED DOWN AT LEAST 35 FEET LEFT OF CENTERLINE AND REQUIRED PILOT INPUT. ILS CRITICAL ZONE WAS PROTECTED AND DID NOT HAVE AN APPROACH WARNING. WIND CALM. ACFT GROUNDED. DFCS BITE SHOWS NO INFLIGHT FAULTS. ACCOMPLISHED LAND VERIFY TEST, BITE GROUP 49, AND HGS SYSTEM TEST, IAW AMM 34-60-00. ALL TESTS PASSED.