Service difficulty report · None · Boeing 7377H4

Difficulty date
September 28, 2021
Submitted
October 26, 2021
Operation
Air carrier
Aircraft
N263WN
Make and model
Boeing 7377H4
Aircraft serial
32520
Aircraft time
46,043 hours, 27,465 cycles
Part
None
Condition
Corroded
Location
Fusleage
Stage of operation
UK
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

CORROSION ON UNDERSIDE OF INTERCOSTAL BELOW FLOOR SUPPORT STRAP, AT BS 767+6; RBL 20; WL 154. REMOVED CORROSION ON INTERCOSTAL WEB, MEASURES:L=1.900'; W=0.600'; D= 0.020'; ORIGINAL THICKNESS:0.050'; MATERIAL LOSS:0.020'; REMAINING THICKNESS:0.030'. THE WEB INTERCOSTAL IS OUT OF LIMITS IAW SRM 53-60-15-1A-1, ALLOWABLE DAMAGE 1, TABLE 101, STEP 4.G(2). REMOVED INTERCOSTAL WEB IAW SRM 51-40-02. LOCATED AND DRILLED A NEW INTERCOSTAL WEB IAW SRM 51-40-05, AND DWG 146A0081. INSTALLED NEW INTERCOSTAL WEB IAW SRM 51-40-02 AND DWG 146A0081.

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