SDR ASAA2022102040409

Service difficulty report · Autopilot Sys · Boeing 737890

Difficulty date: October 20, 2022
Submitted: October 24, 2022
Operation: Air carrier
Aircraft: N512AS
Make and model: Boeing 737890
Aircraft serial: 39043
Aircraft time: 50,849 hours, 14,956 cycles
System (JASC): 2210 · Autopilot System
Part: Autopilot Sys
Condition: Disengaged
Stage of operation: LD
How discovered: V
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

AUTOPILOT DRIFTED TO LATERAL LIMIT AT 50 FT. AUTOPILOT DISENGAGED AND AIRCRAFT HAND FLOWN TO TOUCHDOWN. RWY 16R, CRITICAL AREA CLEAR. WIND 180/7KTS. GROUNDED - YES. DFCS INFLIT FAULTS SHOWS NO RELEVANT DFCS MSG FOR ONT 20/19 FLT LEGS CH A OR B. PERFORMED ALL BITE LIBRARY TESTS/DFCS REF B737-800 AMM 22-11-00 AND FCC INSTALLATION TESTS REF AMM 22-11-33. NO FAULTS FOUND. ALL TESTS P ASS. ALSO PERFORMED HGS 30 DAY IN USE OPS AND SYSTEM TESTS REF SMM 34-36-00. APPROACH SURVEY SUCCESSFUL.