Service difficulty report · J-Box · Cessna 172R

Difficulty date
February 3, 2003
Submitted
May 14, 2003
Operation
General aviation
Aircraft
N465CA
Make and model
Cessna 172R
Aircraft serial
17280465
Engine
Lyc IO360A1A
Part
J-Box
Part number
MC012A
Part serial
80143504
Condition
Loose
Location
Firewall
Part time
3,600 hours
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

FOUND THE ELECTRICAL JUNCTION BOX (J-BOX) BRACKETS LOOSE. FURTHER INVESTIGATION REVEALED THAT THE 12 RIVETS THAT HOLD THE BRACKETS TO THE BOX WHERE LOOSE AND 6 OF THE 12 RIVETS THE RIVET HEADS WERE POPPING OFF, CRACKED AND FRACTURED (PHOTOS). IF LEFT UNATTENDED THIS COULD CAUSE THE BOX TO COME LOOSE FROM THE BRACKETS AND CAUSE POSSIBLE ELECTRICAL PROBLEMS. ALSO THE RIVET HEADS COMING LOOSE COULD CAUSE ARCING INSIDE THE BOX. WAS ADVISED BY AC MFG TO REPLACE THE B-STYLE RIVETS WITH AD RIVETS. NOTE: IN ORDER TO DO THIS HAD TO DISASSEMBLE THE WHOLE BOX AND COMPONENTS.

More about the Cessna 172R