Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
March 22, 2023
Submitted
April 24, 2023
Operation
Air carrier
Aircraft
N957WN
Make and model
Boeing 7377H4
Aircraft serial
41528
Aircraft time
38,518 hours, 23,626 cycles
Part
Stringer
Condition
Corroded
Location
Zn 200 Fus Top
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 ON AFT OF FWD CARGO BAY END OF STRINGER AT BS 540 STRINGER 25R.<[01] EVALUATED DAMAGE ON STRINGER 25R AT BS 540 FWD CARGO BAY FOUND TO BE OUT OF LIMITS; ORIGINAL THICKNESS 0.036' MATERIAL LOSS MORE THAN 50% IAW SRM 53-00-03-1A-1;[02] REJECTION MEASUREMENT TABLE ITEM 2;3;5;6 NEED TO BE FILLED OUT N/A;[03] REJECTION MEASUREMENT TABLE ITEM 2;3;5;6 NEED TO BE FILLED OUT; N/A IS NOT VALID FOR THIS MEASUREMENT.;[04] CORRECTED MEASUREMENT TABLE ITEM 2;3;5 AND 6;[05] REMOVED CORROSION ON STRINGER 25R AT BS 540 FWD CARGO BAY; AREA L=1' X W=1' IAW SRM 51-10-02-0G-0;[06] VERIFIED CORRECTIVE ACTIONS #1 AND #5<BR>MEASUREMENT TABLE VERIFIED;[07] PERFORMED CUT OUT S-25R FWD CARGO BAY AT BS 500D+12 TO BS 540; IAW SRM 51-10-02-0G-0 REFER TO EA NO: 23-153-01036;[08] VERIFIED CORRECTIVE ACTION 7;[09] PARTIAL STEP 1;[10] UPDATED STEP 1- OK TO INSTALL;[11] PARTIAL STEP 1;[12] COMPLETED STEP 1;[13] COMPLETED STEP 1;[14] REPAIRED ACCOMPLISHED PER EA 23-153-01036;[15] VERIFIED MEASUREMENT TABLE AND CORRECTIVE ACTION 14 REPAIRED PER EA 21-153-01036

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