SDR ASAA11510551

Service difficulty report · Unknown · Boeing 737890

Difficulty date: October 19, 2011
Submitted: October 21, 2011
Operation: Air carrier
Aircraft: N565AS
Make and model: Boeing 737890
Aircraft serial: 35181
Aircraft time: 18,713 hours, 5,849 cycles
System (JASC): 2210 · Autopilot System
Part: Unknown
Condition: Malfunctioned
Location: Autopilot Sys
Stage of operation: NR
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

WITH AUTO PILOT "B" ENGAGED AIRPLANE ROLLED 1/4 DEGREE LEFT TO RIGHT (INDICATED ON THE AILERON TRIM INDICATOR ON YOKE) FLIGHT ATTENDANTS NOTICED IT MID CABIN. NO ISSUES WITH AUTO PILOT "A" ENGAGED. COULD NOT DUP. DFCS FAULT REVIEW NR 20 LOG NO FAULTS LAST LEG. ACCOMP DFCS LAND VERIFY NR 49 TEST AILERON LIBRARY TEST NR 31 & HGS SYSTEM TEST. ALL CHECK NML REF FIM:22 11/801 MM:22 11 00 22 11 25 & SSM: 34 36 00.