Service difficulty report · Spar Cap · Cessna 402C

Difficulty date
October 3, 2019
Submitted
October 7, 2019
Operation
Air carrier
Aircraft
N764EA
Make and model
Cessna 402C
Aircraft serial
402C0237
Aircraft time
33,685 hours, 36,655 cycles
System (JASC)
5711 · Wing Spar
Part
Spar Cap
Part number
51220316
Condition
Cracked
Location
Rt Wing
Part time
33,685 hours, 36,655 cycles
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

DURING A ROUTINE INSPECTION, A CRACK WAS VISUALLY IDENTIFIED ON THE RIGHT HAND FORWARD UPPER SPAR CAP. THERE ARE NO OTHER DEFECTS NOTED IN THIS AREA, THIS INCLUDES NO LOOSE OR MISSING FASTENERS. THE CRACK IN THE SPAR CAP WAS CONFIRMED BY SURFACE EDDY CURRENT INSPECTION. THE CRACK IS LOCATED ON THE FORWARD RADIUS BETWEEN THE VERTICAL AND HORIZONTAL FLANGES. THE LENGTH OF THE CRACK IS 1.150, AND IS LOCATED AT APPROXIMATE RIGHT WING STATION 69.00. THE CAP WITH BE REPLACED WITH A FACTORY NEW PART.

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