Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
August 29, 2023
Submitted
October 12, 2023
Operation
Air carrier
Aircraft
N8311Q
Make and model
Boeing 7378H4
Aircraft serial
38808
Aircraft time
37,275 hours, 17,282 cycles
Part
Floorbeam
Part number
UNKNOWN
Condition
Cracked
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

CRACK ANGLE FLOOR STRUCTURE BS 540 BTW LB 0 TO RBL 24.75 AT PASSENGER CABIN 2023-549783 (BL 0 TO RBL 24.75)<[01] REPLACED ANGLE FLOOR STRUCTURE BS 540 BTW LB 0 TO RBL 24.75 AT PASSENGER CABIN IAW B737-800 SRM 51-10-02 PARAGRAPH 9; SRM 51-40-02 AND DWG:143A5240 SHEET 14 REV -. ?SEE INDIVIDUALS SING-OFF BELOW?.;[02] STEP 1 CORRECTED <BR>REPLACED ANGLE FLOOR STRUCTURE BS 540 BTW BL 0 TO RBL 24.75 AT PASSENGER CABIN IAW B737-800 SRM 51-10-02 PARAGRAPH 9; SRM 51-40-02 AND DWG:143A0060 REV -. ?SEE INDIVIDUALS SING-OFF BELOW?.;[03] CORRECTED STEP 2. REPLACED ANGLE FLOOR STRUCTURE BS 540 BTW BL 0 TO RBL 24.75 AT PASSENGER CABIN IAW B737-800 SRM 51-10-02 PARAGRAPH 9; SRM 51-40-02 AND DWG:143A0060 REV -. SEE INDIVIDUALS SIGN-OFF BELOW;[04] REPLACED ANGLE FLOOR STRUCTURE BS 540 BTW BL 0 RBL 24.75 AT PASSENGER CABIN IAW B373-800 SRM 51-10-02 PARAGRAPH 9; SRM 51-40-02 DWG: 143A0060 REV:- RII VERIFIED

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