Service difficulty report · Autopilot Sys · Boeing 737990ER

Difficulty date
July 10, 2016
Submitted
July 12, 2016
Operation
Air carrier
Aircraft
N428AS
Make and model
Boeing 737990ER
Aircraft serial
36353
Aircraft time
1,358 hours, 438 cycles
Part
Autopilot Sys
Condition
Malfunctioned
Stage of operation
AP
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

A REQUESTED AUTOLAND WENT AWRY, CAME IN ON G/S BUT TO RIGHT OF COURSE AT 50 FT. RADAR ALTIMETER RECEIVED AN APPROACH WARNING IN THE HUD. DISCONNECTED A/P AND LANDED MANUALLY. ACFT GROUNDED. NO FAULTS LOGGED IN DFCS A & B LAST 10 LEGS. ACCOMPLISHED LAND VERIFY TEST IAW AMM 22-11-00,TEST PASSED.