Service difficulty report · Autopilot Sys · Boeing 737990ER

Difficulty date
December 6, 2015
Submitted
December 8, 2015
Operation
Air carrier
Aircraft
N491AS
Make and model
Boeing 737990ER
Aircraft serial
44109
Aircraft time
16 hours, 11 cycles
Part
Autopilot 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

ABOUT 1200 AGL WITH BOTH AUTOPILOT A AND B ENGAGED, THE AUTOPILOT DISCONNECTED. ALL PARAMETERS WERE NORMAL. NO APPROACH WARNING BOTH ILS FREQUENCIES WERE TUNED CORRECTED AND HAD GOOD IDENTS. THE HGS WORK NORMAL. ACFT GROUNDED. ACCOMPLISHED DFCS BITE REF FIM 22-11-00-810-801. FOUND FCC B DROPPED IN APP, ACCOMPLISHED IAW LWMP SYS TABLE DFCS PT.11 22-11-00/201, NR 49 LAND VERIFY AND HGS SMM 34-36-00, HGS SYST TEST, ALL TESTS PASSED.