Service difficulty report · Crosstube · Bell 407

Difficulty date
February 21, 2002
Submitted
April 11, 2002
Operation
Air carrier
Aircraft
N437AL
Make and model
Bell 407
Aircraft serial
53141
Part
Crosstube
Part number
407050202101
Part serial
A161
Condition
Corroded
Location
Mlg
Part time
5,298 hours
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

DAILY SERVICE CHECK, FOUND HEAVY PITTING CORROSION UNDER WEAR PADS. SCRAPPED CROSSTUBE. PROBABLE CAUSE IS WATER ENTRAPMENT. EXTENT OF CORROSION ALMOST UNDETECTABLE WITH ALL PARTS INSTALLED. RECOMMEND INSPECTION BE DONE WITH CROSSTUBE REMOVED FROM AIRCRAFT AND WEAR PADS REMOVED. INSPECTION SHOULD BE ON TIME SPECIFIC INTERVALS.

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