Service difficulty report · Structure · Boeing 7377H4

Difficulty date
July 21, 2021
Submitted
August 26, 2021
Operation
Air carrier
Aircraft
N444WN
Make and model
Boeing 7377H4
Aircraft serial
29839
Aircraft time
61,121 hours, 35,983 cycles
Part
Structure
Condition
Corroded
Location
Bs 260
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

CORROSION ON TOP SURFACE OF AFT CHORD AT BS 260.7; WL 207; RBL 9 ; / [01] REMOVED CORROSION ON TOP SURFACE OF AFT CHORD AT BS 260.7; WL 207; RBL 9. DIMENSIONS OF DAMAGE REMOVAL FOUND TO BE 1.6' X 0.7'. DAMAGED PART HAS NO ALLOWABLE DAMAGE ENTRY; THEREFORE; DAMAGE FOUND TO BE OUT OF LIMITS PER SRM 51-10-02-0G-0.; [02] VERIFIED REMOVED CORROSION ON TOP SURFACE OF AFT CHORD AT BS 260.7; WL 207; RBL 9. DIMENSIONS OF DAMAGE REMOVAL FOUND TO BE 1.6' X 0.7'. DAMAGED PART HAS NO ALLOWABLE DAMAGE ENTRY; THEREFORE; DAMAGE FOUND TO BE OUT OF LIMITS PER SRM 51-10-02-0G-0.; [03] REQUEST NDI TO PERFORM UT INSPECTION OF DAMAGE REMOVAL BLEND AREA ON TOP SURFACE OF AFT CHORD AT BS 260.7; WL 207; RBL 9 TO VERIFY REMAINING THICKNESS.; [04] REQUEST NDI TO PERFORM HFEC INSPECTION OF DAMAGE REMOVAL BLEND AREA ON TOP SURFACE OF AFT CHORD AT BS 260.7; WL 207; RBL 9 TO VERIFY CRACK FREE CONDITION.; [05] REQUEST NDI TO PERFORM HFEC INSPECTION OF OPEN HOLES IN DAMAGE REMOVAL BLEND AREA ON TOP SURFACE OF AFT CHORD AT BS 260.7; WL 207; RBL 9 TO CRACK FREE CONDITION

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