An emb-145 cas alerted both pitch trim channels failed so an emergency was declared and the flight d...

Narrative:

I was pilot not flying on a day VFR flight. Normal flight through FL220 then both pitch trim channels failed. This was our second leg with this aircraft and we encountered a similar malfunction during the previous leg. We ran appropriate QRH procedure to reset the pitch trim channels. We were unable to recover either channel so after a brief conversation with dispatch and maintenance control via ACARS we decided to divert. We chose the divert airport because it was 50 miles away as we were in a nose-down pitch setting and uncertain of the condition of our horizontal stabilizer because of some poorly explained stabilizer faults on the cmc by line maintenance in the previous station who 'ops checked good' the same malfunction during our previous flight. Declared emergency and set up for a visual to [runway] 18C. Pilot flying did an excellent job flying the approach and taxied to gate without incident.loss of pitch trim was our threat which compounded into other threats. No autopilot; no pitch trim; no speedbrakes; very high vref speeds per QRH; excessive back pressure required to remain stable as we slowed to approach speed.

Original NASA ASRS Text

Title: An EMB-145 CAS alerted both PITCH TRIM channels failed so an emergency was declared and the flight diverted. The crew had no autopilot; pitch trim or speedbrakes; and excessive back pressure was required to remain stable as they slowed to a very high Vref speed.

Narrative: I was pilot not flying on a day VFR flight. Normal flight through FL220 then both Pitch Trim channels failed. This was our second leg with this aircraft and we encountered a similar malfunction during the previous leg. We ran appropriate QRH procedure to reset the Pitch Trim channels. We were unable to recover either channel so after a brief conversation with Dispatch and Maintenance Control via ACARS we decided to divert. We chose the divert airport because it was 50 miles away as we were in a nose-down pitch setting and uncertain of the condition of our horizontal stabilizer because of some poorly explained stabilizer faults on the CMC by Line Maintenance in the previous station who 'ops checked good' the same malfunction during our previous flight. Declared emergency and set up for a visual to [Runway] 18C. Pilot flying did an excellent job flying the approach and taxied to gate without incident.Loss of pitch trim was our threat which compounded into other threats. No autopilot; no pitch trim; no speedbrakes; very high Vref speeds per QRH; Excessive back pressure required to remain stable as we slowed to approach speed.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1113700
Time
Date	201309
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	EMB ERJ 145 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Horizontal Stabilizer Trim
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy

An emb-145 cas alerted both pitch trim channels failed so an emergency was declared and the flight diverted. The crew had no autopilot; pitch trim or speedbrakes; and excessive back pressure was required to remain stable as they slowed to a very high vref speed.