SDR SWAA2022052397178

Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date: April 23, 2022
Submitted: May 23, 2022
Operation: Air carrier
Aircraft: N474WN
Make and model: Boeing 7377H4
Aircraft serial: 33861
Aircraft time: 59,626 hours, 35,442 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Intercostal
Condition: Corroded
Location: Fuselage
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 INNER CHORD LOCATED ON BS 328 AT LEVEL OF FLOOR STRUCTURE RBL 64 WL 208.1 FWD GALLEY AREA 2022 211502 / [01] TOOL USED ULTRASONIC EQUIPMENT PN: 35DL; SN: 091419910; DUE DATE: 26 JAN 23.;[02] REPLACED INNER CHORD AND FASTENERS LOCATED ON BS 259 TO BS 360 AT LEVEL OF FLOOR STRUCTURE RBL 64 WL 208.1 FWD GALLEY AREA; PART NUMBER USED SWA 654A0004-134 PO 2022-128996 IAW B737-700 SRM 51-40-02;SRM 51-10-02 ITEM 9 AND DWG:141A8310 SHEET 25 REV:

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