<< >> NASA ASRS Report 160506, October 1990

Commuter small transport flight crew experiences oil loss on left engine, diverts to an emergency landing with engine shutdown.

Attributes
ACN	160506
Time
Date	199010
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : djb
State Reference	OH
Altitude	msl bound lower : 7000 msl bound upper : 7000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cle
Operator	common carrier : air carrier
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other 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 : 195 flight time total : 6245 flight time type : 195
ASRS Report	160506
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Over tvt at 15000' MSL, noted left engine oil pressure fluctuating 50-70 psi. Initiated descent with cle center to 11000' MSL with possible engine shutdown with first officer. During approach phase at 7000' MSL, left engine oil pressure dropped to 5-10 psi with propeller starting to surge. Precautionary engine shutdown accomplished and emergency declared with cle approach. Flew ASR to 5R. Cleared by tower to land 5L. Landed with no further complications. Aircraft nose wheel steering inoperative, and could not make right turns to clear taxiway between 5L and 5R. Passenger (13) deplaned to bus. Aircraft towed to maintenance with no further complications. Post-flight showed oil tank empty with oil leaking out of cowling. Engine reserviced with oil. Found propeller government pressure relief line leaking at lower b-nut. Oil line replaced, engine serviced and run. Corrected discrepancy. Aircraft ferried to mob.

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Original NASA ASRS Text

Title: COMMUTER SMT FLT CREW EXPERIENCES OIL LOSS ON LEFT ENGINE, DIVERTS TO AN EMERGENCY LNDG WITH ENGINE SHUTDOWN.

Narrative: OVER TVT AT 15000' MSL, NOTED LEFT ENG OIL PRESSURE FLUCTUATING 50-70 PSI. INITIATED DSNT WITH CLE CENTER TO 11000' MSL WITH POSSIBLE ENG SHUTDOWN WITH F/O. DURING APCH PHASE AT 7000' MSL, LEFT ENG OIL PRESSURE DROPPED TO 5-10 PSI WITH PROP STARTING TO SURGE. PRECAUTIONARY ENG SHUTDOWN ACCOMPLISHED AND EMER DECLARED WITH CLE APCH. FLEW ASR TO 5R. CLRED BY TWR TO LAND 5L. LANDED WITH NO FURTHER COMPLICATIONS. ACFT NOSE WHEEL STEERING INOP, AND COULD NOT MAKE RIGHT TURNS TO CLR TXWY BTWN 5L AND 5R. PAX (13) DEPLANED TO BUS. ACFT TOWED TO MAINT WITH NO FURTHER COMPLICATIONS. POST-FLT SHOWED OIL TANK EMPTY WITH OIL LEAKING OUT OF COWLING. ENG RESERVICED WITH OIL. FOUND PROP GOV PRESSURE RELIEF LINE LEAKING AT LOWER B-NUT. OIL LINE REPLACED, ENG SERVICED AND RUN. CORRECTED DISCREPANCY. ACFT FERRIED TO MOB.

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.