Service difficulty report · Pressure Switch · Doug MD11F

Difficulty date
December 23, 2008
Submitted
January 8, 2009
Operation
Air carrier
Aircraft
N617FE
Make and model
Doug MD11F
Aircraft serial
48748
Aircraft time
46,218 hours, 10,484 cycles
Engine
Ge CF680
Engine time
7,812 hours, 1,787 cycles
Part
Pressure Switch
Part number
21SN04334
Part serial
CFL7470A
Condition
Frozen
Location
Nr 3 Engine
Stage of operation
TO
How discovered
O
Nature of condition
J
Precautionary procedure
C

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

LOW SPEED REJECTED T/O AT 75KT DUE TO LEVEL 2 ENGINE OIL FILTER 3 ALERT. COMPLETED RTO AND OIL FILTER CHECK LISTS. OIL TEMPS WERE ALL AT 65 DEGREES. ACFT COLD SOAKED FROM SITTING IN VERY COLD AIR FOR 2 DAYS. CONTACTED MX AND AGREED THAT PROBLEM WAS MOST LIKELY DUE TO COLD SOAK. SECOND T/O SUCCESSFUL. R&R SCAVENGE OIL FILTER ELEMENT PER MM 79-22-05-4-1 & OIL FILTER DIFFERENTIAL PRESSURE SWITCH PER MM 7 9-35-01-4 1 ON NR 3 ENGINE. NR 3 ENGINE RAN PER 340709 IAW JRH. LEAK CHECK OK

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