SDR ASAA0956649

Service difficulty report · Unknown · Boeing 737890

Difficulty date: September 19, 2009
Submitted: September 21, 2009
Operation: Air carrier
Aircraft: N566AS
Make and model: Boeing 737890
Aircraft serial: 35181
Aircraft time: 10,586 hours, 3,325 cycles
System (JASC): 2210 · Autopilot System
Part: Unknown
Part number: UNKNOWN
Condition: Malfunctioned
Location: Autopilot Sys
Stage of operation: DE
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

DESCENT BELOW 10K IN VNAV PATH F/O'S TARGET BUG PROGRAMMED TO 240 KIAS (CORRECT) CAPT'S TARGET BUG DROPPED TO APPROX 205 KIAS BUGS AGREED IN LVL CNG & V/S MODES. PERFORMED AUTOPILOT FLT FAULT REVIEW NO FAILURES LOGGED. ADRU BITE CHECKS NORMAL. SMC HAVE LOGGED FAULT 27 31026 & 27 32026 TROUBLE SHOT PER FIM 34 61 00 810 801. NO FAILURES NOTED. FMC BITE PER 34 61 00 810 801 ALSO HAS NO CURRENT OR LOGGED FAULTS. NO OTHER REPORTED HISTORY.