An mdt lost partial power on 1 of its engines. It then landed safely en route.

Attributes
ACN	223413
Time
Date	199210
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : iah airport : crp
State Reference	TX
Altitude	msl bound lower : 24000 msl bound upper : 25000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zhu tower : sfo
Operator	common carrier : air carrier
Make Model Name	Medium Transport, High Wing, 2 Turboprop Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 220 flight time total : 15000 flight time type : 1700
ASRS Report	223413
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	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : took evasive action other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

While climbing to FL250 and at approximately FL240, we began losing torque (power) in #1 (left) engine. After leveling at FL250, the power loss continued. An emergency was declared with houston center and we diverted to corpus christi airport (the closest in point of time). The joint decision was made not to shut the engine down as it was developing some power with oil temperature and pressure normal. The nh showed satisfactory combustion and the propeller was rotating at good speed with no indicator it was or would go flat pitch. Our flight attendant was briefed and a PA was made to the passenger. I elected to let the autoplt do most of the flying to allow both pilots more time to troubleshoot and monitor the aircraft's progress. We continued direct to corpus airport, when at 9000 ft, engine power was suddenly restored with all indications normal. A normal visual approach was made to runway 13 and a normal landing made. While rolling out and at taxi speed, the engine again lost power and was shut down. Taxi to the gate was uneventful.

Original NASA ASRS Text

Title: AN MDT LOST PARTIAL PWR ON 1 OF ITS ENGS. IT THEN LANDED SAFELY ENRTE.

Narrative: WHILE CLBING TO FL250 AND AT APPROX FL240, WE BEGAN LOSING TORQUE (PWR) IN #1 (L) ENG. AFTER LEVELING AT FL250, THE PWR LOSS CONTINUED. AN EMER WAS DECLARED WITH HOUSTON CTR AND WE DIVERTED TO CORPUS CHRISTI ARPT (THE CLOSEST IN POINT OF TIME). THE JOINT DECISION WAS MADE NOT TO SHUT THE ENG DOWN AS IT WAS DEVELOPING SOME PWR WITH OIL TEMP AND PRESSURE NORMAL. THE NH SHOWED SATISFACTORY COMBUSTION AND THE PROP WAS ROTATING AT GOOD SPD WITH NO INDICATOR IT WAS OR WOULD GO FLAT PITCH. OUR FLT ATTENDANT WAS BRIEFED AND A PA WAS MADE TO THE PAX. I ELECTED TO LET THE AUTOPLT DO MOST OF THE FLYING TO ALLOW BOTH PLTS MORE TIME TO TROUBLESHOOT AND MONITOR THE ACFT'S PROGRESS. WE CONTINUED DIRECT TO CORPUS ARPT, WHEN AT 9000 FT, ENG PWR WAS SUDDENLY RESTORED WITH ALL INDICATIONS NORMAL. A NORMAL VISUAL APCH WAS MADE TO RWY 13 AND A NORMAL LNDG MADE. WHILE ROLLING OUT AND AT TAXI SPD, THE ENG AGAIN LOST PWR AND WAS SHUT DOWN. TAXI TO THE GATE 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.