Service difficulty report · Flex Hose · Cessna 525C

Difficulty date
February 5, 2014
Submitted
February 6, 2014
Operation
General aviation
Filed by
AMCR163C
Alticor Inc
Aircraft
N716DV
Make and model
Cessna 525C
Aircraft serial
0049
Aircraft time
753 hours, 683 cycles
Part
Flex Hose
Part number
S3128A0112000G
Part serial
NSN
Condition
Kinked
Location
Mlg Actuator
Part time
753 hours, 683 cycles
Stage of operation
IN
How discovered
V
Nature of condition
W
Precautionary procedure
K

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

What was found

DURING GEAR SWING, AFTER UPLOCK ACTUATOR REPLACEMENT, NOTED THAT THE BRAKE HYDRAULIC HOSE FROM FORWARD SPAR TO THE TRUNNION BRACKET ON TOP OF THE RT MLG WAS KINKING DURING THE UPSWING AT ABOUT 30 DEGREES UP FROM THE DOWN AND LOCKED POSITION. AS THE GEAR PROGRESSED UPWARD DURING SWING, KINKING BECAME WORSE UNTIL 3/4TH WAY UP THEN APPEARED TO EASE OFF. WITH GEAR BACK TO THE DOWN AND LOCKED POSITION, BOTH LEFT AND RIGHT MAIN HOSES REVEALED DEFORMATION ON THE HOSE JUST BACK FROM THE SWAGED END NEAR TRUNNION BRACKET. THERE IS A SWIVEL FITTING INSTALLED ON THE SPAR END OF HOSE AND THAT DOES INDEED WORK.

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