SDR 32029B

Service difficulty report · Cable · Waco UPF7

Difficulty date
July 15, 2004
Submitted
July 15, 2004
Operation
General aviation
Aircraft
N32029
Make and model
Waco UPF7
Aircraft serial
5660
Aircraft time
5,500 hours
System (JASC)
3242 · Brake
Part
Cable
Condition
Defective
Location
Brake Sys
Stage of operation
IN
How discovered
V
Nature of condition
S
Precautionary procedure
K

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

What was found

CABLE ASSY CONNECT BRAKE PEDALS TO MASTER CYLINDERS WERE INSPECTED UNDER MORE SCRUTINY AFTER FINDING DEFECTIVE CABLE SECURING OIL TANK. CABLE ENDS APPEARED TO BE OLD STYLE WOVEN CABLE SPLICE. FOUND CABLE WAS WRAPPED AROUND THIMBLE, SAFETY WIRE WAS WRAPPED AROUND TWO PIECES OF CABLE, JOINT SOLDERED. CORROSION PRESENT IN SOLDERED SAFETY WIRE EVIDENCED AS A GREENISH, WHITE POWDER. CABLES HAVE BURNED LOOKING AREAS AT SOLDERED AREA THAT MAY HAVE BEEN CAUSED BY TORCH USED TO HEAT AREA. AC WAS REBUILT IN 1987. LOGBOOK ENTRIES DO NOT INDICATE CABLES WERE CHANGED. HAD CABLE FAILED, BRAKES WOULD BECOME INOPERATIVE. CABLE SPLICE IS UNAIRWORTHY. AC SHOULD NOT HAVE PASSED ANNUAL INSPECTIONS WITH THESE CABLES INSTALLED.

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