<< >> NASA ASRS Report 886953, May 2010

B737 flight crew experienced an electric trim failure during approach and continued to landing using manual trim after an emergency was declared.

Attributes
ACN	886953
Time
Date	201005
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Landing
Component
Aircraft Component	Elevator Trim System
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Not Flying First Officer
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

I was the pilot flying on this flight. Inbound on short final; the electric stab trim failed while the hand flying the aircraft. I asked the first officer to confirm the failure on his side; which he did. An emergency was then declared with tower (assistance was not requested). The first officer and I had a brief discussion regarding aircraft controllability with the current condition and configuration (landing configuration: flaps 30). Controllability was good throughout the remainder of the approach; although continuous forward pressure on the yoke was necessary. The first officer had to adjust the manual trim wheel; as the auto throttles were placarded inoperative. Due to our close proximity to the runway; I decided to continue the approach with the current condition and configuration. An uneventful landing followed. At the gate; the first officer found the stab trim actuator circuit breaker popped. A log entry was made.

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Original NASA ASRS Text

Title: B737 flight crew experienced an electric trim failure during approach and continued to landing using manual trim after an emergency was declared.

Narrative: I was the pilot flying on this flight. Inbound on short final; the electric stab trim failed while the hand flying the aircraft. I asked the First Officer to confirm the failure on his side; which he did. An emergency was then declared with Tower (assistance was not requested). The First Officer and I had a brief discussion regarding aircraft controllability with the current condition and configuration (landing configuration: flaps 30). Controllability was good throughout the remainder of the approach; although continuous forward pressure on the yoke was necessary. The First Officer had to adjust the manual trim wheel; as the auto throttles were placarded inoperative. Due to our close proximity to the runway; I decided to continue the approach with the current condition and configuration. An uneventful landing followed. At the gate; the First Officer found the stab trim actuator circuit breaker popped. A log entry was made.

Data retrieved from NASA's ASRS site as of April 2012 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.