Service difficulty report · Skin · Boeing 7377H4

Difficulty date
April 23, 2019
Submitted
March 8, 2022
Operation
Air carrier
Aircraft
N438WN
Make and model
Boeing 7377H4
Aircraft serial
29833
Aircraft time
55,634 hours, 32,666 cycles
Part
Skin
Condition
Corroded
Location
Aft Fuselage
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

***CORROSION*** SIGNS OF CORROSION UNDER DORSAL FIN AREA BETWEEN STA 927 TO STA 1006. STR2L TO STR2R / REPAIRED CORROSION DAMAGE UNDER DORSAL FIN BS 927-1006 BETWEEN STR 2L-2R. AREA #1 4.8' X 4.0' REMAINING .040' DMG .040'. AREA #2; 1.5' X 1' REMAINING .040' ORIG. .040'. AREA #3 4' X 2' REMAINING .039' ORIG. .040'. AREA #4 9' X 7.5' REMAINING .039' ORIG. .040' AND 4' X 4.5' REMAINING .069' ORIG. .071'. AREA #1-3 IN LIMITS; AREA #4 OUT OF LIMITS. AREA #1-3 BS 927-986 RESTORED FINISH IAW AMM 51-21-41-370-802 AND AMM 51-21-72-370-804. AREA #4 BS 986-1006 REF. TO DEFECT N203232 FOR REPAIR.

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