Service difficulty report · Web · Boeing 7377H4

Difficulty date
August 6, 2021
Submitted
September 20, 2021
Operation
Air carrier
Aircraft
N410WN
Make and model
Boeing 7377H4
Aircraft serial
27897
Aircraft time
66,797 hours, 39,221 cycles
Part
Web
Condition
Cracked
Location
Bs 277-294 Bl0
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 BSTA 277 AND BSTA 294.5; BLO 0 FWD GALLEY AND LAV ; 2021-373093 / [01] REMOVED WEB - INTERCOSTAL FLOOR STRUCTURE LOCATED BETWEEN BS 277 AND BS 294.5; BLO 0 FWD GALLEY AND LAV I.A.W. B737-700 SRM 51-40-02. PERFORMED VISUAL INSPECTION ON AREA AND NOT FOUND MORE DAMAGE. EVALUATED WEB-INTERCOSTAL FOR CRACK AND NOT FOUND ALLOWABLE DAMAGE ON SRM. WEB-INTERCOSTAL MUST BE REPLACED. MEASURE CRACK IS L: 0.280 TOOL USED CALIPER P/N: 500-752-20; S/N: B21037208; DUE DATE: 11-AUG-22; [02] STEP 1 COMPLETED; [03] PERFORMED DRILL AND APPLIED PROTECTIVE TREATMENT ON NEW HOLES WEB - INTERCOSTAL FLOOR STRUCTURE LOCATED BETWEEN BS 277 AND BS 294.5; BLO 0 FWD GALLEY AND LAV I.A.W. B737-700 SRM 51-40-05 AND SRM 51-20-01.; [04] RII; STEP 3 COMPLETED.; [05] OK TO INSTALL WEB - INTERCOSTAL AND FASTENERS LOC. ON FLOOR STRUCTURE LOCATED BETWEEN BS 277 AND BS 294.5; BLO 0 FWD GALLEY AND LAV; [06] RII; STEP 5 COMPLETED. <BR>OK2INS GRANTED.; [07] INSTALLED WEB - INTERCOSTAL AND FASTENERS LOC. ON FLOOR STRUCTURE LOCATED BETWEEN BS 277 AND BS 294.5; BLO 0 FWD GALLEY AND LAV I.A.W B737-700 SRM 51-40-02 AND DWG 141A5400; SHEET 20; REV -; [08] STEP 7 COMPLETED. RII; [09] REPLACED WEB - INTERCOSTAL AND FASTENERS LOC. ON FLOOR STRUCTURE LOCATED BETWEEN BS 277 AND BS 294.5; BLO 0 FWD GALLEY AND LAV I.A.W B737-700 SRM 51-40-02 AND DWG 141A5400; SHEET 20; REV -; [10] CERTIFIED STEP 9<BR>RII VERIFIED

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