Service difficulty report · Bulkhead Web · Boeing 7377H4

Difficulty date
September 1, 2020
Submitted
September 4, 2020
Operation
Air carrier
Aircraft
N279WN
Make and model
Boeing 7377H4
Aircraft serial
32532
Aircraft time
45,687 hours, 27,400 cycles
Part
Bulkhead Web
Condition
Cracked
Location
Bs 663
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

DURING INSPECTION OF THE CENTER REAR SPAR VAPOR BARRIER WEB FOUND APPROXIMATELY 3.75 INCH VERTICAL HAIR LINE CRACK BETWEEN RBL 40-43 RT WHEEL WELL REF SRM 57-10-10 FOR ALLOWABLE LIMITS. MOD/PERFORMED INTERIM REPAIR OF CENTER REAR SPAR VAPOR WEB @ RBL 40-43, REF EA 1-A57-13410. PERMANENT ACTION REQUIRED: ACCOMPLISH A PERMANENT REPAIR AS GIVEN IN 737-700 SRM 51-70-04. REPAIR 10 OR AS AN ALTERNATIVE REPAIR PART OF THE CRACK SO THAT THE CRACK LENGTH IS LESS THAN OR EQUAL TO THE MAXIMUM ALLOWABLE DAMAGE LIMIT. APPLY THE INTERIM SEAL OVER THE CRACK THAT IS LEFT AS GIVEN IN 737-700 SRM 57-10-10 PARA 2.C.(4) ALLOWABLE DAMAGE 2.

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