Service difficulty report · Support · Boeing 7377H4

Difficulty date
February 27, 2024
Submitted
April 3, 2024
Operation
Air carrier
Aircraft
N460WN
Make and model
Boeing 7377H4
Aircraft serial
32464
Aircraft time
64,633 hours, 38,691 cycles
Part
Support
Part number
UNKNOWN
Condition
Corroded
Location
Bs 500a-500c
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

CORROSION FWD CARGO BAY R/H FLOOR TO SIDEWALL SUPPORT PLATE MULTIPLE AREAS AROUND NUT PLATE HOLES BS500A+3' TO BS500C+6' RBL22 WL156<[01] EVALUATED CORROSION ON ALL LOCATIONS OF FLOOR TO SIDEWALL SUPPORT; FOUND DEEPEST LOCATION AT BS 500B+10 RBL 22 WL 156; FOUND 0.025 REMOVED FROM ORIG 0.045 IN 1'X.1' AREA; FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING DIAL DEPTH GAUGE ATS 2678 DUE 05/2024;[02] CORRECTION TO CORRECTIVE ACTION 1; SHOULD READ; EVALUATED CORROSION ON ALL LOCATIONS OF FLOOR TO SIDEWALL SUPPORT; FOUND DEEPEST LOCATION AT BS 500B+10 RBL 22 WL 156; FOUND 0.020 REMOVED FROM ORIG 0.040 IN 1'X.1' AREA; FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING DIAL DEPTH GAUGE ATS 2678 DUE 05/2024;[03] VERIFIED CORRECTIVE ACTION ENTRY 2.;[04] COMPLETED STEP 3;[05] REPLACED FLOOR TO SIDEWALL SUPPORT BETWEEN BS 500A TO 500D AT FCB PER SRM 51-40-02 AND DWG:143A7500.;[06] VERIFIED CORRECTIVE ACTION #5;[07] TASK COMPLETE

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