Service difficulty report · Support · Boeing 7377H4

Difficulty date
February 3, 2022
Submitted
March 3, 2022
Operation
Air carrier
Aircraft
N469WN
Make and model
Boeing 7377H4
Aircraft serial
33859
Aircraft time
59,572 hours, 35,384 cycles
Part
Support
Part number
146A750251
Condition
Corroded
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 FORWARD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT B.S. 500A+2; 500A+6; 500A+10; 500A+14; 500B+10 AND 500C+10; R.B.L. 25. / [01] EVALUATED CORROSION ON FLOOR TO SIDEWALL SUPPORT AT ALL LOCATIONS; FOUND DEEPEST LOCATION TO BE AT BS 500A+6 RBL 25 WL 156 FOUND 0.015 REMOVED FROM ORIG 0.040 IN 1'X1' AREAS FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING DIAL DEPTH GAUGE ATS 2473;[02] VERIFIED CORRECTIVE ACTION ENTRY 1.;[03] LOCATED AND DRILLED NEW FCB FLOOR TO SIDEWALL SUPPORT BS500A-500D; RBL 25 PER DWG143A7500; AND SRM 51-40-05-0G-0;[04] VERIFIED CORRECTIVE ACTION ENTRY 3. CARD COMPLETE.

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