Service difficulty report · Unknown · Boeing 737890

Difficulty date
August 6, 2009
Submitted
August 10, 2009
Operation
Air carrier
Aircraft
N517AS
Make and model
Boeing 737890
Aircraft serial
35197
Aircraft time
2,205 hours, 667 cycles
Part
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

F/O FLIGHT DIRECTOR PITCH BAR DISAPPEARS INTERMITTENTLY DURING DESCENT. MACH TRIM FAIL LIGHT ILLUMINATES WITH MASTER CAUTION "RECALL" INTERMITTENTLY. PERFORMED TASK 22 11 00 740 801 DFCS OPERATIONAL TEST FLIGHT DIRECTOR GROUP 12 TEST AND DFCS OPERATIONAL TEST MACH TRIM GROUP 13 TEST. ALL AUTO TESTS PASSED. NOTE: NO CURRENT FAULTS. OK FOR SERVICE.