Service difficulty report · Autoland Sys · Boeing 737990ER

Difficulty date
May 22, 2021
Submitted
June 2, 2021
Operation
Air carrier
Aircraft
N462AS
Make and model
Boeing 737990ER
Aircraft serial
36362
Aircraft time
26,181 hours, 8,459 cycles
Part
Autoland Sys
Condition
Malfunctioned
Stage of operation
LD
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

CAT 3 AUTOLAND/HGS 16R WIND 230/6. AIRCRAFT FLARED @ APPROZ 30' BUT DIDNT SETTLE TO RWY. A/C REMAINED AT 20-30'. CLICKED OFF A/P AND LANDED MANUALLY. GROUNDED - YES. UNABLE TO DUPLICATE DEFECT OR PREVIOUS FINDINGS. DFCS FAULT REVIEW SHOWED NO RELEVANT FAULTS. COMPLETED DFCS GROUP #10 (CURRENT STATUS) AND #11 (AUTOPILOT) TESTS PER B737-900 FIM 22-11 TASK 801 - ALL TESTS PASS. PERFORMED DFCS GROUP #49 (LAND VERIFY) TEST PER B737-900 AMM 22-11-00-700-801 - ALL TESTS PASS. ALSO PERFORMED HGS SYSTEM TEST PER HGS SMM 34-36-00 - ALL TESTS PASS