Service difficulty report · Spar Cap · Cessna 402C

Difficulty date
July 12, 2018
Submitted
July 17, 2018
Operation
Air carrier
Aircraft
N258PB
Make and model
Cessna 402C
Aircraft serial
402C0336
Aircraft time
35,957 hours, 33,615 cycles
System (JASC)
5711 · Wing Spar
Part
Spar Cap
Part number
512204123
Condition
Corroded
Location
Lt Wing
Part time
35,957 hours, 36,315 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

WHILE CONDUCTING OTHER MAINTENANCE, CORROSION WAS NOTED ON THE HORIZONTAL LEG OF THE LOWER LEFT AFT OUTBOARD SPAR CAP, AT WS 222.46. THE CORROSION AREA MEASURED .218 BY .086. THE DEPTH OF THE CORROSION MEASURED AT .022, WHICH IS DEEPER THAN THE ALLOWABLE REMOVAL LIMITS PER MEB 95-11 R1 SECTION 7 PARAGRAPH B. AS A RESULT, THE SPAR CAP WITH CHANGED WITH NEW.

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