Service difficulty report · Skin · Boeing 7377H4

Difficulty date
June 19, 2023
Submitted
July 17, 2023
Operation
Air carrier
Aircraft
N417WN
Make and model
Boeing 7377H4
Aircraft serial
29822
Aircraft time
71,145 hours, 42,399 cycles
Part
Skin
Part number
UNKNOWN
Condition
Corroded
Location
Zn 100 Fus Lower
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

SPOTTY SKIN CORROSION; BS1050 -1088; BETWEEN SKATE ANGLE AND AFT LEFT VERTICAL FIN FWD SUPPORT ANGLE<[01] SEVERAL AREAS OF CORROSION ON THE ANGLE AT BS 1036 FROM STR2R-STR2L FOUND TO BE OUT OF LIMITS DUE TO NO SRM ALLOWABLE DAMAGE IAW SRM 51-10-02 PAR 9C;[02] REMOVED ANGLE AT BS 1036 FROM STR2R-STR2L IAW SRM 51-40-02;[03] REMOVED FASTENERS FROM BS 1026-BS1040 BETWEEN LBL12-RBL12 IAW SRM 51-40-02;[04] REMOVED CORROSION ON FUSELAGE SKIN FROM BS1026-BS1040 BETWEEN LBL12-RBL12. MAX MATERIAL REMOVED IN AREA OF 10'LX1.0'W IAW SRM 51-10-02;

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