Service difficulty report · Autoland Sys · Boeing 737890

Difficulty date
July 31, 2016
Submitted
August 2, 2016
Operation
Air carrier
Aircraft
N583AS
Make and model
Boeing 737890
Aircraft serial
35681
Aircraft time
34,463 hours, 10,186 cycles
Part
Autoland Sys
Condition
Malfunctioned
Stage of operation
LD
How discovered
O
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

DURING AUTOLAND AND HGS APPROACH SURVEY AIRCRAFT DRIFTED AND TOUCHED DOWN APPROXIMATELY 40 FEET LEFT OF CENTERLINE. CRITICAL AREA WAS CLEAR AND WINDS WERE REPORTED WITHIN LIMITS AND ND WIND DISPLAY SHOWED WINDS IN LIMIT. TOUCH DOWN OCCURRED SMOOTHLY BUT WAS NOT CORRECTING UNTIL DONE SO MANUALLY. HGS WAS USED AND DID NOT ISSUE APPROACH WARNING. ACFT GROUNDED. ACCOMPLISHED DFCS BITE FAULT REVIEW, FIM 22-11 TASK 801. CHANNEL A LOGGED FAULT MESSAGE 22-11822 LEG 02 AND CHANNEL B LOGGED FAULT MESSAGE 22-11391 LEG 06. ACCOMPLISHED FMCS BITE, FIM 34-61 TASK 801 AND MMR BITE, FIM 34-31 TASK 801. BITE TESTS PASSED WITH NO CURRENT FAULTS. PERFORMED DFCS GROUP 49 (LAND VERIFY) TEST PER AMM 22-11-00 AND HGS OPERATIONAL AND SYSTEM TEST PER HGS SMM 34-36-00. ALL TESTS PASS.