Emj crew had both main pitch trim system become inoperative just after takeoff.

Attributes
ACN	553812
Time
Date	200207
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Aircraft 1
Controlling Facilities	tower : dfw.tower
Operator	common carrier : air carrier
Make Model Name	Embraer Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : initial climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	553817
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	553813
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance controller : provided flight assist flight crew : landed in emergency condition flight crew : declared emergency flight crew : diverted to another airport other
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Main pitch trim system inoperative on takeoff on both sides. Main pitch trim system inoperative prior to 160 KTS on takeoff. Referred to aircraft operating manual procedures. Could not fully restore system. Used backup system remainder of flight. Contacted maintenance operating controller and system operations controller. Was advised to return to dfw. Burned fuel to avoid overweight landing. Declared emergency. Briefed flight attendant and passenger. Met maintenance at gate.

Original NASA ASRS Text

Title: EMJ CREW HAD BOTH MAIN PITCH TRIM SYS BECOME INOP JUST AFTER TKOF.

Narrative: MAIN PITCH TRIM SYS INOP ON TKOF ON BOTH SIDES. MAIN PITCH TRIM SYS INOP PRIOR TO 160 KTS ON TKOF. REFERRED TO ACFT OPERATING MANUAL PROCS. COULD NOT FULLY RESTORE SYS. USED BACKUP SYS REMAINDER OF FLT. CONTACTED MAINT OPERATING CTLR AND SYS OPS CTLR. WAS ADVISED TO RETURN TO DFW. BURNED FUEL TO AVOID OVERWT LNDG. DECLARED EMER. BRIEFED FLT ATTENDANT AND PAX. MET MAINT AT GATE.

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.