Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
January 12, 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
Corroded
Location
E/E Bay
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 STRINGER LOCATED BS 360 TO BS 380 STR 27R WL 148.5 AT EQUIPMENT ELECTRONIC COMP / PERFORMED PERMANENT REPAIR ON STRINGER 27R BS 360 TO BS 380 W/148.5 AT EQUIPMENT ELECTRONIC COMP IAW SRM B737-700 53-00-03-2R REPAIR 1 FIG 206 MATERIAL USED ON STRINGER SECTION (-7) 7075-T6 0.032' CHANEL (-2) AND ANGLES (-3) 7075-T6 0.036' AND EVALUATED ALLOWABLE DAMAGE LIMITS AND FOUND OUT LIMITS DUE TO EXCEEDS ALLOWABLE DAMAGE LIMITS IAW SRM B737-700 53-00-03-1A-1 AD1 PARAGRAPH 4A(1)(B) FIGURE 103 DETAIL C P/O MATERIAL 2020-203301

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