Service difficulty report · Float

Difficulty date
August 10, 2011
Submitted
September 2, 2011
Operation
General aviation
Part
Float
Part number
AV30768
Condition
Worn
Location
Carburetor
Component
Carburetor
Component part number
HA6
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

BRASS FLOATS, PN AV30-768 WITH PN 29-182 TYPE NEEDLE RETRACTION CLIPS HAVE BEEN FOUND WITH SEVERE WEAR IN THE FLOAT FRAME CAUSED BY THE END OF THE 29-182 TYPE CLIP WORKING AGAINST THE BRASS FLOAT FRAME. THESE FLOATS AND CLIPS WERE FOUND IN HA-6 CARBURETORS ORIGINALLY MADE. THE 29-182 TYPE CLIP IS INTENDED FOR USE WITH FLOAT FRAMES MADE OF STAINLESS STEELE. THE BRASS FLOATS EQUIPPED WITH THE 29-182 TYPE CLIPS APPEAR TO HAVE HAD THE BRACKET, PN 178-48, REMOVED TO WHICH THE PROPER WIRE FORM NEEDLE RETRACTION CLIP PN 29-194 ATTAHCES. EXCESSIVE WEAR OF THE FLOAT FRAME COULD RESULT IN THE FLOAT SYS STICKING AND COULD RESULT IN FUEL FLOW TO THE ENGINE BEING INTERRUPTED OR RESTRICTED. PN 29-182 FLOAT CLIPS ARE NOT APPROVED BY THE CARBURETOR MFG FOR USE WITH BRASS FLOAT FRAMES. SUBMITTER RECOMMENDS THAT CLIP TYPE 29-182 NEVER BE USED WITH BRASS TYPE FLOATS.