Service difficulty report · Web · Boeing 7377H4

Difficulty date
July 31, 2021
Submitted
September 7, 2021
Operation
Air carrier
Aircraft
N442WN
Make and model
Boeing 7377H4
Aircraft serial
32459
Aircraft time
60,608 hours, 35,906 cycles
Part
Web
Condition
Cracked
Location
Bs 312-328 Lbl47
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

CRACK WEB - INTERCOSTAL FLOOR STRUCTURE LOCATED BETWEEN BS312 TO BS 328 AND LBL 47 FWD GALLEY AND LAV ; 2021-341468 / [01] REMOVED WEB - INTERCOSTAL FLOOR STRUCTURE LOCATED BETWEEN BS312 TO BS 328 AND LBL 47 FWD GALLEY AND LAV I.A.W B737-700 SRM 51-40-02;TOOK MEASURE OF CRACK IS:L 1.981 ; TOOL USED CALIPER P/N:DIGITAL 150; S/N: AE-412606; DUE DATE: 21-MAY-22 AND PERFORMED VISUAL INSPECTION ON ADJACENT AREA AND NOT FOUND MORE DAMAGE.; [02] STEP 1 COMPLETED.; [03] DRILLED HOLES ON NEW WEB INTERCOSTAL FLOOR STRUCTURE LOCATED BETWEEN BS312 TO BS 328 AND LBL 47 FWD GALLEY AND LAV I.A.W B737-700 SRM 51-40-05.; [04] STEP 3 COMPLETED; RII.; [05] APPLIED PROTECTIVE TREATMENT ON HOLES OF NEW INTERCOSTAL I.A.W B737-700 SRM 51-20-01 AND OK TO INSTALL NEW WEB INTERCOSTAL AND FASTENERS LOCATED BETWEEN BS312 TO BS 328 AND LBL 47 FWD GALLEY AND LAV.; [06] STEP 5 COMPLETED; RII.; [07] INSTALLED NEW WEB INTERCOSTAL FLOOR STRUCTURE LOCATED BETWEEN BS312 TO BS 328 AND LBL 47 FWD GALLEY AND LAV I.A.W B737-700 SRM 51-40-02 AND DWG 141A5400 REV-.; [08] WEB INTERCOSTAL INSTALLATION COMPLETE PER STEP 7<BR>RII ACCOMPLISHED; [09] REPLACED WEB INTERCOSTAL FLOOR STRUCTURE LOCATED BETWEEN BS312 TO BS 328 AND LBL 47 FWD GALLEY AND LAV I.A.W B737-700 SRM 51-40-02; SRM 51-10-02 PARAGRAPH 9 AND DWG 141A5400 REV-.; [10] STEP 9 COMPLETED RII

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