Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
March 11, 2023
Submitted
April 17, 2023
Operation
Air carrier
Aircraft
N221WN
Make and model
Boeing 7377H4
Aircraft serial
34259
Aircraft time
58,906 hours, 34,822 cycles
Part
Intercostal
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 FLOOR STRUCTURE INTERCOSTAL BRAKE PANEL LOCATED BTW BS 294.5 TO BS 312 AT FWD GALLEY AREA 2023-185239<[01] TOOL USED: ULTRASONIC THICKNESS GAUGE; PN: 45MG; SN: 221861811; DUE DATE: 08-NOV-23;[02] REPLACED NEW INTERCOSTAL BRAKE PANEL LOCATED BTW BS 294.5 TO BS 312 AT FWD GALLEY AREA AND FASTENERS I.A.W B737-700 SRM 51-40-02 AND DWG 141A5400 REV - SHEET 8 SEE INDIVIDUAL SIGN OFF BELOW;[03] RII ITEM <BR>REPLACED NEW INTERCOSTAL BRAKE PANEL LOCATED BTW BS 294.5 TO BS 312 AT FWD GALLEY AREA AND FASTENERS I.A.W B737-700 SRM 51-40-02 AND DWG 141A5400 REV - SHEET 8 SEE INDIVIDUAL SIGN OFF BELOW<BR>TASKCARD COMPLETED

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