SDR ASAA2016071917426

Service difficulty report · Autopilot Sys · Boeing 737990ER

Difficulty date: July 19, 2016
Submitted: July 21, 2016
Operation: Air carrier
Aircraft: N448AS
Make and model: Boeing 737990ER
Aircraft serial: 36356
Aircraft time: 1,180 hours, 384 cycles
System (JASC): 2210 · Autopilot System
Part: Autopilot Sys
Condition: Malfunctioned
Stage of operation: AP
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

IN LNAV/VNAV MODE, AUTOPILOT ENGAGED, FAILED TO CAPTURE WAYPOINT ALTITUDE AND AIRSPEED ON ARRIVAL. ON APPROACH, APPROACH MODE WOULD NOT ARM. AUTOPILOT A USED FOR ALL. ACFT GROUNDED. AFTER ARRIVAL FOUND NR 2 NAV HAD VOR FREQ PREVENTING APPROACH MODE. NO FAULTS LOGGED IN FMC OR DFCS BITE. ACCOMPLISHED LAND VERIFY, IAW AMM 22-11-00, TEST PASS.