Service difficulty report · Floor Panel · Boeing 7377H4

Difficulty date
July 22, 2022
Submitted
August 22, 2022
Operation
Air carrier
Aircraft
N490WN
Make and model
Boeing 7377H4
Aircraft serial
32476
Aircraft time
59,880 hours, 35,571 cycles
Part
Floor Panel
Part number
241ADF
Condition
Cracked
Location
Cabin Floor
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

AFT CABIN FLOOR PANEL 241ADF AFT O/B CORNER IS CRACKED. / [01] IDENTIFIED FLOOR PANEL 241ADF IAW SRM 53-00-50-0I-1 TABLE 6 FIG 6DAMAGED NOTED IS OUT OF ALLOWABLE DAMAGE LIMITS IAW SRM 53-00-50-1A-1 PARA 4 DAMAGE TO BE REPAIRED IAW SRM 53-00-50-2R-6 REMOVED ALL DAMAGE TO AFT O/B OF PANEL AND CLEANED REPAIR AREA IAW SRM 53-00-50-2R-6 PARA 3C-EFABRICATED CORE PLUG FROM BMS8-124 TYV GR5 CL4 LOT# 1287137 AND FABRICATED REPAIR PLIES FOR UPPER SURFACE USING BMS9-3 ST1581 LOT# 149322-1. OKAY TO INSTALL CORE PLUG AND UPPER SURFACE PLIES IAW SRM 53-00-50-2R-6 PARAGRAPH 3.F.G(1)INSTALLED CORE PLUG USING BMS5-28 TY19 LOT# AK2DP3091K AND INSTALLED REPAIR PLIES ON LOWER SURFACE USING BMS8-201 TYIII LOT#AK2CP8139K AND VACUUM BAGGED; LEAK CHECKED VACUUM BAG GOOD USING VACUUM GAUGE ID: 11543 CAL DUE: 08/2022 AND SET TO CURE IAW SRM 53-00-50-2R-6 PAR. 3.K(1)L.(1).;[07] CORRECTION FOR ITEM 6: 'IAW SRM 53-00-50-2R-6 PAR. 3.K(1)L.(1).' TO SAY 'IAW SRM 53-00-50-2R-6 PAR. 3.G(1)H(1).';[08] RII VERIFIED CORRECTIVE ACTION ITEM 6-7.;CURED REPAIR PLIES AND CORE PLUG ON THE UPPER SURFACE USING THERMOMETER ID: ATS2209 CAL DUE: 10/2021; AND VACUUM GAUGE ID: 11543 CAL DUE: 08/2022 AND REMOVED VACUUM BAG AND TRIMMED REPAIR EDGES; AND SANDED CORE PLUG TO CONTOUR IAW SRM 53-00-50-2R-6 PARAGRAPH 3.I(1). FABICATED LOWER SURFACE REPAIR PLIES FROM BMS 9-3 H2 LOT#1493221-1; INSTALLED REPAIR PLIES USING BMS8-201 TYPE 4 LOT#1482288-1; COMPLETED SUCCESSFUL CURE

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