Service difficulty report · Seal · Bell 206B

Difficulty date
June 8, 2001
Submitted
June 29, 2001
Operation
Air carrier
Aircraft
N51698
Make and model
Bell 206B
Aircraft serial
4010
Engine
Allsn 250C20
Part
Seal
Part number
23063371
Condition
Torn
Location
Gearbox
Stage of operation
IN
How discovered
V
Nature of condition
K
Precautionary procedure
K

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

What was found

1) INSTALLED NEW SEAL PN23063371, MGR-80201, REV B, OTHER MARKINGSON SEAL ARE 63005SOCN. 2) SEAL STARTED LEAKING LESS THAN 4 HOURS AND 15 STARTS LATER, SEAL LIP IS TORN, APPEARS LIKE A RIP, SUSPECT SEAL IS NOT COMPATIBLE WITH EXXON 8380 TURBINE OIL AND MAYBE STUCK, THEN TORE LIP. 3) THIS IS NEW STYLE SEAL, DUE TO LEAKAGE PROBLEMS THAT HAD WITH OLD STYLE SEAL PN 6854424. 4) THIS IS THE SECOND NEW STYLE (BROWN COLOR) SEAL INSTALLED AT THIS AREA, IN THIS ENGINE BY 2 DIFFERENT FBO. IT IS INSTALLED IN THE GEARBOX AT THE STARTER GENERATOR PAD.

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