Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
January 10, 2021
Submitted
February 15, 2021
Operation
Air carrier
Aircraft
N406WN
Make and model
Boeing 7377H4
Aircraft serial
27894
Aircraft time
66,898 hours, 39,718 cycles
Part
Stringer
Condition
Cracked
Location
Fwd Cargo
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

CRACK STRINGER 25L AT BS 540 FWD CARGO COMPARTMENT / PERFORMED PERMANENT REPAIR ON STRINGER 25L AT BS 540 FWD CARGO COMPARTMENT BTW BS 500D TO BS 540 IAW B737-700 SRM 53-00-03-2R REPAIR 1 FIGURE 206 MATERIAL USED ON STRINGER SECTION (-7) 7075-T6 0.045' CHANNEL (-2) 7075-T6 0.050' ANGLES (-3) 7075-T6 0.050' AND PERFORMED EVALUATED ALLOWABLE DAMAGE LIMITS AND FOUND OUT DUE TO CRACK IAW B737-700 SRM 53-00-03-1A-1 PO MATERIAL 2015-506435

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