SDR ASAA12511211

Service difficulty report · Unknown · Boeing 737890

Difficulty date: March 8, 2012
Submitted: March 12, 2012
Operation: Air carrier
Aircraft: N577AS
Make and model: Boeing 737890
Aircraft serial: 35186
Aircraft time: 18,792 hours, 5,718 cycles
System (JASC): 2210 · Autopilot System
Part: Unknown
Condition: Malfunctioned
Stage of operation: CL
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

AFTER T/O VNAV SELECTED A/S BUG ON BOTH PILOT FLT DISPLAYS INDICATED UP INSTEAD OF 250 KTS. FLAPS WERE FULLY RETRACTED. THIS PROBLEM CONTINUED TO LEVEL OFF AT 34 000FT WITH MULTIPLE ATTEMPTS AT VNAV & LVL CHANGE. LVL CHG WAS OK. CLIMB PAGE ANNUNCIATED 212 (TOP CTR). PROGRESS PAGE HAD NO ETA'S OR FUEL PREDICTIONS FOR FUTURE WAYPOINTS. AT LEVEL OFF ALL PAGES AND SPEED COMMANDS RETURNED TO NORMAL ON LEVEL OFF. VNAV ALSO NORMAL AT LEVEL OFF. NO LOGGED FAULTS SYS TESTS GOOD REF 22 00 01 730 801.