SDR 9804001221

Service difficulty report · By Pass Switch · Doug DC1030

Difficulty date
March 8, 1998
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N221NW
Make and model
Doug DC1030
Aircraft serial
46579
Engine
Ge CF650C
Part
By Pass Switch
Part number
21SN0434
Condition
Failed
Location
Engine
Part time
50,993 hours
Stage of operation
CR
Nature of condition
J
Precautionary procedure
A, E

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

What was found

WHILE AT CRUISE, THE NR 3 ENGINE OIL FILTER CLOG LIGHT ILLUMINATED. THE CREW FOLLOWED THE COM 2.72.72 AND SHUT DOWN THE ENGINE. THERE WERE NO OTHER ABNORMAL INDICATIONS. THE AIRCRAFT RETURNED TO HNL AND LANDED WITHOUT DIFFICULTY. MAINTENANCE REPLACED THE OIL FILTER BYPASS SWITCH AND THE MAIN ENGINE OIL FILTER. THE FILTER APPEARED CLEAN WITH NO EVIDENCE OF ENGINE DISTRESS. THE AIR

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