Service difficulty report · Floor Support · Boeing 7378H4

Difficulty date
September 28, 2022
Submitted
October 25, 2022
Operation
Air carrier
Aircraft
N8644C
Make and model
Boeing 7378H4
Aircraft serial
35973
Aircraft time
26,784 hours, 12,542 cycles
Part
Floor Support
Condition
Cracked
Location
Bs 344-360 Lbl1
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

CRACKED INTERCOSTAL BS 344-360 WL 208 LBL 1. / [01] CRACK DAMAGED INTERCOSTAL AT BS 344 TO BS 360 LBL 1 WL 208 CRACK LENGTH MEASURED AT .580' FOR AND AFT .662' FROM INBOARD EDGE USING MICROMETER PER2242 S/N UNKNOWN CAL DUE 01/2023 FOUND TO BE OUT OF LIMITS IAW SRM 53-10-51-1A-1 FIG 105 A; COMPLETED MEASUREMENTS TABLE;[02] VERIFIED CORRECTIVE ACTION ITEM 1.<BR><BR>VERIFIED MEASUREMENTS TABLE.;[03] REMOVED CRACK DAMAGED INTERCOSTAL AT BS 344 TO BS 360 LBL 1 WL 208 IAW SRM 51-40-02-0G-0 LOCATED AND DRILLED NEW INTERCOSTAL IAW SRM 51-40-05-0G-0 AND BOEING DWG 141A5400 OK TO INSTALL;[04] VERIFIED CORRECTIVE ACTION ITEM 3. OK TO INSTALL.;[05] INSTALLED INTERCOSTAL AT BS 344 TO BS 360 LBL 1 WL 208 IAW SRM 51-40-02-0G-0 AND BOEING DWG 141A5400 APPLIED CIC IAW AMM 51-21-91-620-802;[06] VERIFIED CORRECTIVE ACTION STEP 5.;[07] VERIFIED TASK CARD COMPLETE. VERIFIED MEASUREMENT TABLE COMPLETE.

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