An embraer 145 on taxi when selecting flaps 9 degrees got multiple EICAS warnings and uncommanded no...

Attributes
ACN	538314
Time
Date	200202
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : lax.tower
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	ground : pushback ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 230 flight time total : 5000 flight time type : 2800
ASRS Report	538314
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : eicas other flight crewa other flight crewb
Resolutory Action	flight crew : overcame equipment problem
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Upon selection of flaps 9 degrees, multiple failures were indicated on the EICAS display (flaps low speed, sps advanced, sps #1 and #2 inoperative). What concerns me is the movement of the nosewheel -- uncommanded. This occurred twice before the nosewheel steering was deselected. The indications of the EICAS were corrected per maintenance instructions and the flight completed without further problem. Problem: uncommanded nosewheel movement. Callback conversation with reporter revealed the following information: the reporter stated while taxiing, the flaps were selected to 9 units and immediately got EICAS display warnings. The reporter said flaps low speed, stall protection system, and stall protection system #1 and #2 all were on the display. The reporter stated at this time that the nose gear wheels made uncommanded movements and the nosewheel steering was deselected. The reporter said the airplane was stopped and the maintenance controller contacted and advised of the problem. The reporter stated the controller requested pulling and resetting several circuit breakers and this returned the system to normal operation with no EICAS warnings. The reporter said the nose steering was normal during the taxi and takeoff.

Original NASA ASRS Text

Title: AN EMBRAER 145 ON TAXI WHEN SELECTING FLAPS 9 DEGS GOT MULTIPLE EICAS WARNINGS AND UNCOMMANDED NOSEWHEEL MOVEMENTS.

Narrative: UPON SELECTION OF FLAPS 9 DEGS, MULTIPLE FAILURES WERE INDICATED ON THE EICAS DISPLAY (FLAPS LOW SPD, SPS ADVANCED, SPS #1 AND #2 INOP). WHAT CONCERNS ME IS THE MOVEMENT OF THE NOSEWHEEL -- UNCOMMANDED. THIS OCCURRED TWICE BEFORE THE NOSEWHEEL STEERING WAS DESELECTED. THE INDICATIONS OF THE EICAS WERE CORRECTED PER MAINT INSTRUCTIONS AND THE FLT COMPLETED WITHOUT FURTHER PROB. PROB: UNCOMMANDED NOSEWHEEL MOVEMENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED WHILE TAXIING, THE FLAPS WERE SELECTED TO 9 UNITS AND IMMEDIATELY GOT EICAS DISPLAY WARNINGS. THE RPTR SAID FLAPS LOW SPD, STALL PROTECTION SYS, AND STALL PROTECTION SYS #1 AND #2 ALL WERE ON THE DISPLAY. THE RPTR STATED AT THIS TIME THAT THE NOSE GEAR WHEELS MADE UNCOMMANDED MOVEMENTS AND THE NOSEWHEEL STEERING WAS DESELECTED. THE RPTR SAID THE AIRPLANE WAS STOPPED AND THE MAINT CTLR CONTACTED AND ADVISED OF THE PROB. THE RPTR STATED THE CTLR REQUESTED PULLING AND RESETTING SEVERAL CIRCUIT BREAKERS AND THIS RETURNED THE SYS TO NORMAL OP WITH NO EICAS WARNINGS. THE RPTR SAID THE NOSE STEERING WAS NORMAL DURING THE TAXI AND TKOF.

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.

An embraer 145 on taxi when selecting flaps 9 degrees got multiple EICAS warnings and uncommanded nosewheel movements.