SDR ASAA2020121933715

Service difficulty report · Autoland Sys · Boeing 737890

Difficulty date: December 19, 2020
Submitted: December 22, 2020
Operation: Air carrier
Aircraft: N589AS
Make and model: Boeing 737890
Aircraft serial: 35686
Aircraft time: 47,392 hours, 14,110 cycles
System (JASC): 2210 · Autopilot System
Part: Autoland Sys
Condition: No Test
Stage of operation: LD
How discovered: C
Nature of condition: L
Precautionary procedure: O

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

What was found

30 DAY AUTOLAND ATTEMPTED AND FAILED. NEVER GOT A111 BOTH AUTOPILOTS WERE ENGAGED BUT ONLY SINGLE CHANNEL ANNUNCIATED IN HUD. GROUNDED-YES. NO FAULTS IN DFCS FLT HISTORY. HGS LAST LEG FAULT "A111 INCAP ADC-BARO ALT COMPARISON" FAULT CPT WAS 30.22 F/O'S WAS 30.16. MATCHED UP BARO'S & ACCOMPLISHED LAND VERIFY, REF B737-800 AMM 22-11-00/201 "ALL TESTS PASS" & HGS SYS TEST, REF SMM 34-36-00 TEST OK. AC REMAINS CAT 3A AUTOLAND & HGS QUALIFIED. ETOPS GROUND VERIFICATION COMPLETE.