Light transport air carrier aircraft engine shutdown after a malfunction during approach.

Attributes
ACN	204103
Time
Date	199203
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dtw
State Reference	MI
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dtw tower : dtw
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach descent other landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : commercial pilot : cfi pilot : atp pilot : instrument
Experience	flight time last 90 days : 20 flight time total : 2600 flight time type : 10
ASRS Report	204103
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer observation : company check pilot
Qualification	pilot : commercial pilot : instrument pilot : atp
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : overcame equipment problem other
Consequence	other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

I was receiving initial operating experience as captain on an light transport aircraft from cak to dtw. On climb out from cak we (the crew) noted a split in the power levers and abnormal indications on the right engine (#2). After troubleshooting, we suspected a single redline computer problem and turned that system off. We continued to dtw without further complication until on vectors on a downwind for 21L the right engine would not reduce below 30 percent torque. When the right power lever was moved, the engine would surge +/- 15 percent, causing the aircraft to yaw excessively left and right. We advised dtw tower while on final approach that we would be declaring an emergency due to a precautionary shutdown, and that we would like to go missed approach and secure the engine. We broke off the approach and were vectored back for an approximately 15 mi final again for 21L. The right engine was shut down approximately 5 mi outside the OM. All appropriate checklists were completed and the aircraft was landed without incident. Follow-up with maintenance the next day revealed that the fuel control unit to the engine had failed internally.

Original NASA ASRS Text

Title: LTT ACR ACFT ENG SHUTDOWN AFTER A MALFUNCTION DURING APCH.

Narrative: I WAS RECEIVING INITIAL OPERATING EXPERIENCE AS CAPT ON AN LTT ACFT FROM CAK TO DTW. ON CLBOUT FROM CAK WE (THE CREW) NOTED A SPLIT IN THE PWR LEVERS AND ABNORMAL INDICATIONS ON THE R ENG (#2). AFTER TROUBLESHOOTING, WE SUSPECTED A SINGLE REDLINE COMPUTER PROBLEM AND TURNED THAT SYS OFF. WE CONTINUED TO DTW WITHOUT FURTHER COMPLICATION UNTIL ON VECTORS ON A DOWNWIND FOR 21L THE R ENG WOULD NOT REDUCE BELOW 30 PERCENT TORQUE. WHEN THE R PWR LEVER WAS MOVED, THE ENG WOULD SURGE +/- 15 PERCENT, CAUSING THE ACFT TO YAW EXCESSIVELY L AND R. WE ADVISED DTW TWR WHILE ON FINAL APCH THAT WE WOULD BE DECLARING AN EMER DUE TO A PRECAUTIONARY SHUTDOWN, AND THAT WE WOULD LIKE TO GO MISSED APCH AND SECURE THE ENG. WE BROKE OFF THE APCH AND WERE VECTORED BACK FOR AN APPROX 15 MI FINAL AGAIN FOR 21L. THE R ENG WAS SHUT DOWN APPROX 5 MI OUTSIDE THE OM. ALL APPROPRIATE CHKLISTS WERE COMPLETED AND THE ACFT WAS LANDED WITHOUT INCIDENT. FOLLOW-UP WITH MAINT THE NEXT DAY REVEALED THAT THE FUEL CTL UNIT TO THE ENG HAD FAILED INTERNALLY.

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.