Service difficulty report · Oil System · Hughes 500N

Difficulty date
July 12, 2001
Submitted
August 7, 2001
Operation
General aviation
Make and model
Hughes 500N
Engine
Allsn 250C20R
Part
Oil System
Part number
23038160
Condition
Blocked
Location
Engine
Part time
858 cycles
Stage of operation
DE
How discovered
O
Nature of condition
E, B
Precautionary procedure
J

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

What was found

(AUS) NR 6 AND NR 7 BEARING OIL SCAVENGE PORT PARTIALLY BLOCKED BY CARBON DEPOSITS. OIL TYPE HAD BEEN CHANGED FROM MOBIL 254 TO MOBIL 291.