Service difficulty report · Barrier · Doug MD11F

Difficulty date
August 8, 2024
Submitted
September 4, 2024
Operation
Air carrier
Aircraft
N253UP
Make and model
Doug MD11F
Aircraft serial
48439
Aircraft time
80,552 hours, 18,705 cycles
Part
Barrier
Part number
WSP0798505
Part serial
UP59172
Condition
Corroded
Location
Zone 100
Stage of operation
IN
How discovered
9
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

REMOVE 10 EACH WEAR PLATES AND EXISTING DOUBLER FROM THE RCB WALL AND INSPECT WALL BASE AND REMOVE CORROSION FOR EVALUATION. BLENDED SMOOTH 4EA AREAS ON RCB WALL FWD FACE SHEET @ STA X=+27.5, X=-8.5, X=-47.5, X=-62.5 BETWEEN Z=-16 & Z=-19 LOCATION REMAINING MATERIAL THICKNESS ARE BETWEEN MIN 0.050" THICK & MAX 0.176" THICK IAW UT THICKNESS INSPECTION AND UPON EVALUATION BLENDED AREA FOUND OUT OF MD11-SRM 53-20-53 -1A-1 ALLOWABLE DAMAGE 1 REV 71.

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