A diversion in a CRJ200 for apparent stabilizer trim-mach trim failure.

Attributes
ACN	627264
Time
Date	200408
Day	Fri
Local Time Of Day	1801 To 2400
Place
State Reference	LA
Altitude	msl single value : 21000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zhu.artcc tower : evv.tower
Operator	common carrier : air carrier
Make Model Name	Regional Jet 200 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : commercial pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 50 flight time total : 3500 flight time type : 2000
ASRS Report	627264
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Resolutory Action	flight crew : diverted to another airport
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Stabilizer trim/mach trim failure. Checklist followed as well as maintenance control contacted. Decision was made to divert. Callback conversation with reporter revealed the following information: maintenance had difficulty duplicating the problem on the ground. It was eventually traced to a stuck autoplt pusher disconnect switch on the copilot's side.

Original NASA ASRS Text

Title: A DIVERSION IN A CRJ200 FOR APPARENT STABILIZER TRIM-MACH TRIM FAILURE.

Narrative: STABILIZER TRIM/MACH TRIM FAILURE. CHKLIST FOLLOWED AS WELL AS MAINT CTL CONTACTED. DECISION WAS MADE TO DIVERT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: MAINT HAD DIFFICULTY DUPLICATING THE PROB ON THE GND. IT WAS EVENTUALLY TRACED TO A STUCK AUTOPLT PUSHER DISCONNECT SWITCH ON THE COPLT'S SIDE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.