SDR HYIA20190621001

Service difficulty report · Attach Fitting · Cessna 402C

Difficulty date: June 20, 2019
Submitted: June 21, 2019
Operation: Air carrier
Aircraft: N818AN
Make and model: Cessna 402C
Aircraft serial: C4020501
Aircraft time: 37,079 hours, 363,323 cycles
System (JASC): 5740 · Wing, Attach Fittings
Part: Attach Fitting
Part number: 08225543
Condition: Corroded
Location: Zone 500
Part time: 37,079 hours, 36,323 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 PERFORMING SPECIAL INSPECTION 402-22 PER INSPECTION PROGRAM MANUAL, AND MAINTENANCE MANUAL 5-20-01, CORROSION WAS VISUALLY IDENTIFIED ON THE LEFT WING'S, FORWARD SPAR'S, LOWER, AFT, WING FITTING. THIS CORROSION IS ON THE LOWER HORIZONTAL FLANGE OF THE FITTING MEASURING APPROXIMATELY 3 INCHES LONG, AND .250 INCHES WIDE, WITH A MAX DEPTH OF .022 INCHES DEEP. THIS FITTING WILL BE REMOVED AND REPLACED USING NEW PARTS.

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