Service difficulty report · Unknown · Boeing 737890

Difficulty date
March 18, 2011
Submitted
March 22, 2011
Operation
Air carrier
Aircraft
N596AS
Make and model
Boeing 737890
Aircraft serial
35688
Aircraft time
10,955 hours, 3,538 cycles
Part
Unknown
Condition
Malfunctioned
Location
Autopilot Sys
Stage of operation
LD
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

EVAL AUTO LAND {OUT OF TOLERANCE LEFT OF CENTER}. DFCS GROUP 20 (FAULT REVIEW) PER FIM 22 11 00 810 801 SHOWED NO RELATED FAULTS BUT HGS FAULT HISTORY SHOWED MULTIPLE FAULTS WITH "ILS ANOMALY DET" AS CAUSE FOR LEG 6. PERFOMED DFCS GROUP 49 (LAND VERIFY) TEST PER MM 22 11 00 AND HGS SYSTEM TEST PER HGS SMM 34 36 00, ALL TESTS PASS.