An embraer 145 on approach from 6000 ft to 3000 ft declared an emergency due to total failure of stabilizer trim. Autoplt, yoke switches and center pedestal mode all inoperative.

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Attributes
ACN	620686
Time
Date	200406
Day	Sun
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl bound lower : 3000 msl bound upper : 6000
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	620686
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : eicas other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : declared emergency flight crew : landed in emergency condition
Consequence	other other
Supplementary
Problem Areas	Aircraft Chart Or Publication
Primary Problem	Aircraft

Narrative:

During turn to final runway 18R at ZZZ, autoplt on, going from 6000 ft to 3000 ft. Opened the speed brakes and got EICAS warnings of trim primary and backup failure. Disconnected autoplt. Tried all modes of pitch trim and total failure. Ran checklist and declared in-flight emergency. S80 was ahead landing on runway 18R, so ATC assigned us runway 18L for landing. Landed uneventfully and taxied to the gate. Notified local maintenance and moc. Callback conversation with reporter revealed the following information: the reporter stated the failure of the pitch trim was total, autoplt trim, yoke pickle switches speed trim, and center pedestal backup switch all failed. The reporter said no details of the corrective action taken by maintenance were reported.

Original NASA ASRS Text

Title: AN EMBRAER 145 ON APCH FROM 6000 FT TO 3000 FT DECLARED AN EMER DUE TO TOTAL FAILURE OF STABILIZER TRIM. AUTOPLT, YOKE SWITCHES AND CTR PEDESTAL MODE ALL INOP.

Narrative: DURING TURN TO FINAL RWY 18R AT ZZZ, AUTOPLT ON, GOING FROM 6000 FT TO 3000 FT. OPENED THE SPD BRAKES AND GOT EICAS WARNINGS OF TRIM PRIMARY AND BACKUP FAILURE. DISCONNECTED AUTOPLT. TRIED ALL MODES OF PITCH TRIM AND TOTAL FAILURE. RAN CHKLIST AND DECLARED INFLT EMER. S80 WAS AHEAD LNDG ON RWY 18R, SO ATC ASSIGNED US RWY 18L FOR LNDG. LANDED UNEVENTFULLY AND TAXIED TO THE GATE. NOTIFIED LCL MAINT AND MOC. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE FAILURE OF THE PITCH TRIM WAS TOTAL, AUTOPLT TRIM, YOKE PICKLE SWITCHES SPD TRIM, AND CTR PEDESTAL BACKUP SWITCH ALL FAILED. THE RPTR SAID NO DETAILS OF THE CORRECTIVE ACTION TAKEN BY MAINT WERE RPTED.

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.