Service difficulty report · Floor Support · Boeing 7377H4

Difficulty date
June 19, 2022
Submitted
July 29, 2022
Operation
Air carrier
Aircraft
N428WN
Make and model
Boeing 7377H4
Aircraft serial
29844
Aircraft time
66,134 hours, 39,057 cycles
Part
Floor Support
Condition
Cracked
Location
Center Wing Box
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

MAIN CABON CENTER WING BOX FLOOR SUPPORT BREAK CRACKED @ STA 540 LBL-1 MKD DOT / [01] REMOVED FLOOR CABIN PANEL 231UF AS PER B-737-700 SRM 51-40-02-0G-0.;[02] REMOVED MAIN CABIN CENTER WING BOX FLOOR SUPPORT STA 540 LBL-1 AS PER B-737-700 SRM 51-40-02-0G-0.;[03] LOCATED AND DRILLED NEW PART AS PER B-737-700 SRM 51-40-05-0G-0.;[04] VERIFIED STEPS:1;2; AND 3. <BR>OK TO INSTALL NEW FLOOR SUPPORT BREAK.;[05] INSTALLED NEW FLOOR SUPPORT BREAK IN REFERENCE B-737-700 SRM 51-40-02-0G-0.;[06] VERIFIED STEP 5. <BR>OK TO REINSTALL FLOOR CABIN PANEL 231UF.;[07] INSTALLED CABIN FLOOR PANEL 231UF AS PER B-737-700 SRM 53-21-00-400-801.;[08] VERIFIED INSTALLATION

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