Service difficulty report · Floor Panel · Boeing 7377H4

Difficulty date
May 4, 2022
Submitted
June 9, 2022
Operation
Air carrier
Aircraft
N477WN
Make and model
Boeing 7377H4
Aircraft serial
33988
Aircraft time
60,414 hours, 35,826 cycles
Part
Floor Panel
Part number
242UF
Condition
Delaminated
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 PASSENGER CABIN FLOOR PANEL 242UF DELAMINATED AT CENTER AREA OF BOARD UPPER SURFACE (MARKED) / [01] IDENTIFIED PANEL 242UF IAW SRM 53-00-50-0I-1 FIGURE 6. DAMAGE TO THE PANEL IS BEYOND ALLOWABLE LIMITS IAW SRM 53-00-50-1A-1 PARAGRAPH 4.B.(1) AND WILL BE REPAIRED IAW SRM 53-00-50-2R-1. REMOVED DAMGED UPPER SURFACE PLIES FROM 5 AREAS; THE LARGEST OF WHICH IS APPROXIMATELY 9'X7' AND CLEANED AREAS WITH NO DISBOND OR CONTAMINATION NOTED; WORK PERFORMED IAW SRM 53-00-50-2R-1 PARAGRAPH 4.A AND C-F. OK TO POT REPAIR AREA.;[02] VALIDATED APPLICABILITY OF SRM 53-00-50-2R-1.;[03] INSPECTED AND VERIFIED CORRECTIVE ACTIONS 1 AND 2. OKAY TO APPLY POTTING COMPOUND PER SRM 53-00-50-2R-1.;[04] APPLIES BMS 5-28 TYPE 19 LOT NUMBER AK1IP5930K-1 TO REPAIR AREAS AND SET TO CURE WITH HOTBONDER ID: ATS883 DUE: 10/2022 IAW SRM 53-00-50-2R-1 PARAGRAPH 3.G-H.;[05] CURED POTTING COMPOUND; SANDED FLUSH; CLEANED REPAIR AREA AND FABRICATED REPAIR PLIES FROM BMS 9-3STYLE 7781 H-3 LOT NUMBER 1431838-1 IAW SRM 53-00-50-2R-1 PARAGRAPH 3.H-J AND K.(1).(A).INSTALLED REPAIR PLIES WITH BMS8-201 TYPE IV LOT NUMBER 1486957-3; VACUUM BAGGED PLIES AND VERIFIED SATISFACTORY 5X5 USING VACUUM GAUGE ID: ATS2107 DUE: 09/2022; WORK PERFORMED IAW SRM 53-00-50-2R-1 PARAGRAPH 3.K.(1).(B-C) AND L.(1). SET PLIES TO CURE USING HOTBONDER ID: NCX000526 DUE: 10/2022 IAW SRM 53-00-50-2R-1 PARAGRAPH 3.M.(1).;[10] CURED PLIES AND UNBAGGED PLIES WORK ACCOMPLISHED IAW SRM 53-00-50-2R-1 PARAGRAPH 3.M.(1)

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