An MD88 flight crew experience a yaw damper failure resulting in an emergency landing.

Attributes
ACN	625299
Time
Date	200407
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : ahn.vortac
State Reference	GA
Altitude	msl single value : 21500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : ztl.artcc
Operator	common carrier : air carrier
Make Model Name	MD-88
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : flight engineer pilot : commercial pilot : atp
ASRS Report	625299
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 350 flight time total : 20000 flight time type : 1200
ASRS Report	625105
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : landed in emergency condition flight crew : declared emergency flight crew : overrode automation
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

On climb out, passing FL215, we lost the yaw damper with hard yaw. Disconnected autoplt/autothrottles. Declared emergency. Talked with maintenance. Followed procedure. Returned to atl. No further problems.

Original NASA ASRS Text

Title: AN MD88 FLT CREW EXPERIENCE A YAW DAMPER FAILURE RESULTING IN AN EMER LNDG.

Narrative: ON CLBOUT, PASSING FL215, WE LOST THE YAW DAMPER WITH HARD YAW. DISCONNECTED AUTOPLT/AUTOTHROTTLES. DECLARED EMER. TALKED WITH MAINT. FOLLOWED PROC. RETURNED TO ATL. NO FURTHER PROBS.

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.