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SDR ASAA2018081095724

Open the Markdown

Service difficulty report · Autoland Sys · Boeing 737990ER

FAA SDR system

Difficulty date
August 9, 2018
Submitted
August 10, 2018
Operation
Air carrier
Aircraft
N468AS
Make and model
Boeing 737990ER
Aircraft serial
41735
Aircraft time
16,418 hours, 5,470 cycles
System (JASC)
2210 · Autopilot System
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

AUTOLAND UNSUCCESSFUL. BOTH AUTOPILOTS ENGAGED W/ FLARE ARMED. NO NOSE UP TRIMMING OCCURRED. APP WARN AND NO AIII AT 100 FT RA. GROUNDED - YES. ACCOMPLISHED MAINTENANCE PRACTICE FOR LLM SPECIAL CONDITION AUTOLAND REF AMM 22-00-01-730-807 & HGS LANDING REF AMM 22-00-01-730-808. DFCS BITE REF FIM 22-11 TASK 801 SHOWS NO FAULTS. HGS FAULT HISTORY SHOWS RWY ELEV ERROR. FOUND HGS RWY ELV SET TO EL379 INSTEAD OF EL120. RE-ACCOMPLISHED HGS SYSTEM/SENSORS TEST REF SMM 34-36-00 & DFCS (GP 49) REF AMM 22-11-00, OPS CK NML. REF L/P 11912572 FOR A/C APPROACH SURVEY.