MD88 crew diverts due to mechanical problem in iad airspace.

Attributes
ACN	405681
Time
Date	199806
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : iad
State Reference	DC
Altitude	msl bound lower : 20000 msl bound upper : 20000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	common carrier : air carrier
Make Model Name	MD-88
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 170 flight time total : 10000 flight time type : 1400
ASRS Report	405681
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : overcame equipment problem flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

En route iad to atl, shortly after climbing through FL200 we got an indication of CSD (constant speed drive) low oil pressure. The abnormal checklist calls for a constant speed drive disconnect which was attempted several times. All attempts were unsuccessful so the throttle on the right engine was retarded to idle, an emergency was declared and a turn back towards iad was initiated. Within approximately 5 mins of landing at iad the constant speed drive was successfully disconnected. As a precaution emergency vehicles met the flight upon landing. An uneventful approach and landing was made.

Original NASA ASRS Text

Title: MD88 CREW DIVERTS DUE TO MECHANICAL PROB IN IAD AIRSPACE.

Narrative: ENRTE IAD TO ATL, SHORTLY AFTER CLBING THROUGH FL200 WE GOT AN INDICATION OF CSD (CONSTANT SPD DRIVE) LOW OIL PRESSURE. THE ABNORMAL CHKLIST CALLS FOR A CONSTANT SPD DRIVE DISCONNECT WHICH WAS ATTEMPTED SEVERAL TIMES. ALL ATTEMPTS WERE UNSUCCESSFUL SO THE THROTTLE ON THE R ENG WAS RETARDED TO IDLE, AN EMER WAS DECLARED AND A TURN BACK TOWARDS IAD WAS INITIATED. WITHIN APPROX 5 MINS OF LNDG AT IAD THE CONSTANT SPD DRIVE WAS SUCCESSFULLY DISCONNECTED. AS A PRECAUTION EMER VEHICLES MET THE FLT UPON LNDG. AN UNEVENTFUL APCH AND LNDG WAS MADE.

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.