<< >> NASA ASRS Report 212649, June 1992

Instructor of small aircraft aircraft was forced to land after takeoff due to loss of engine oil pressure.

Attributes
ACN	212649
Time
Date	199206
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ric
State Reference	VA
Altitude	msl bound lower : 1500 msl bound upper : 1500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ric
Operator	general aviation : instructional
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	climbout : takeoff ground : preflight
Flight Plan	VFR
Person 1
Affiliation	Other
Function	instruction : instructor
Qualification	pilot : instrument pilot : cfi pilot : commercial
Experience	flight time last 90 days : 100 flight time total : 2500 flight time type : 500
ASRS Report	212649
Person 2
Affiliation	Other
Function	other personnel other
Qualification	other other : other
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Preflight action complete. Low oil pressure noted on start up. Shut down engine to verify dipstick secure and no oil escaping in the engine compartment. Dipstick was secure and visual identify showed no oil in the engine compartment. Oil level visually idented at 6 1/4 quarts on dipstick. Start up initiated and oil pressure normal. Oil pressure in green arc during runup. After takeoff, lost oil pressure. Requested 180 degree turn back to departing runway for landing. Upon landing and maintenance check discovered carbon rubber foreign material blocking oil pressure regulator orifice. Material removed and oil pressure returned to normal. No other foreign material noted. Oil change had been completed less than 24 hours earlier. In future should require all oil changes be completed with screened funnel to ensure no contaminates in oil. Total time in service aircraft: 150 hours.

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Original NASA ASRS Text

Title: INSTRUCTOR OF SMA ACFT WAS FORCED TO LAND AFTER TKOF DUE TO LOSS OF ENG OIL PRESSURE.

Narrative: PREFLT ACTION COMPLETE. LOW OIL PRESSURE NOTED ON START UP. SHUT DOWN ENG TO VERIFY DIPSTICK SECURE AND NO OIL ESCAPING IN THE ENG COMPARTMENT. DIPSTICK WAS SECURE AND VISUAL IDENT SHOWED NO OIL IN THE ENG COMPARTMENT. OIL LEVEL VISUALLY IDENTED AT 6 1/4 QUARTS ON DIPSTICK. START UP INITIATED AND OIL PRESSURE NORMAL. OIL PRESSURE IN GREEN ARC DURING RUNUP. AFTER TKOF, LOST OIL PRESSURE. REQUESTED 180 DEG TURN BACK TO DEPARTING RWY FOR LNDG. UPON LNDG AND MAINT CHK DISCOVERED CARBON RUBBER FOREIGN MATERIAL BLOCKING OIL PRESSURE REGULATOR ORIFICE. MATERIAL REMOVED AND OIL PRESSURE RETURNED TO NORMAL. NO OTHER FOREIGN MATERIAL NOTED. OIL CHANGE HAD BEEN COMPLETED LESS THAN 24 HRS EARLIER. IN FUTURE SHOULD REQUIRE ALL OIL CHANGES BE COMPLETED WITH SCREENED FUNNEL TO ENSURE NO CONTAMINATES IN OIL. TOTAL TIME IN SVC ACFT: 150 HRS.

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.