Commuter small transport developed a rough engine on climb out from dfw. Reduced power return land.

Attributes
ACN	187446
Time
Date	199108
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw
State Reference	TX
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dfw
Operator	common carrier : air carrier
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
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 : atp pilot : cfi
Experience	flight time last 90 days : 70 flight time total : 2400 flight time type : 600
ASRS Report	187446
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Departed dfw international airport (destination paris, tx). While receiving radar vectors, right engine began to vibrate about 35 mi east of dfw. Reduced power on right engine to 20 inches mp. Requested vectors back to dfw. Engine vibration ceased after power reduction. Upon arrival to dfw, although assistance was not requested, emergency equipment was present. Flight was terminated at dfw and was uneventful.

Original NASA ASRS Text

Title: COMMUTER SMT DEVELOPED A ROUGH ENG ON CLB OUT FROM DFW. REDUCED PWR RETURN LAND.

Narrative: DEPARTED DFW INTL ARPT (DEST PARIS, TX). WHILE RECEIVING RADAR VECTORS, R ENG BEGAN TO VIBRATE ABOUT 35 MI E OF DFW. REDUCED PWR ON R ENG TO 20 INCHES MP. REQUESTED VECTORS BACK TO DFW. ENG VIBRATION CEASED AFTER PWR REDUCTION. UPON ARR TO DFW, ALTHOUGH ASSISTANCE WAS NOT REQUESTED, EMER EQUIP WAS PRESENT. FLT WAS TERMINATED AT DFW AND WAS UNEVENTFUL.

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.