SDR ASAA2022121641154

Service difficulty report · Autoland Sys · Boeing 737890

Difficulty date: December 16, 2022
Submitted: December 19, 2022
Operation: Air carrier
Aircraft: N577AS
Make and model: Boeing 737890
Aircraft serial: 35186
Aircraft time: 56,442 hours, 16,714 cycles
System (JASC): 2210 · Autopilot System
Part: Autoland Sys
Condition: Faulted
Stage of operation: LD
How discovered: O
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

30-DAY AUTOLAND AND HGS REQUESTED. PERFORMED AN ILS 16R IN SEA BUT WAS UNSATISFACTORY. AIRCRAFT LANDED TOO FAR LEFT OF CENTERLINE BUT WAS WITHIN TOUCHDOWN ZONE AND ON SPEED. THE AIRCRAFT SEEMED TO "DIVE" TO THE LEFT AND DOWN AT ABOUT 100 FEET- NOT THE USUAL FLARE. WINDS WERE A TAILWIND AT 6 KNOTS (WITHIN LIMITS). WINDS 010 16. GROUNDED - YES. ACCOMPLISHED ILS SYSTEM TEST B737-800 AMM TASK 34-31-00-730-801. ALL TESTS PASS. ACCOMPLISHED LAND VERIFY AMM TASK 22-11-00-700-801. ALL TESTS PASS.