Service difficulty report · Skin · Boeing 7377H4

Difficulty date
April 28, 2023
Submitted
June 1, 2023
Operation
Air carrier
Aircraft
N961WN
Make and model
Boeing 7377H4
Aircraft serial
36962
Aircraft time
37,902 hours, 23,158 cycles
Part
Skin
Condition
Pulled
Location
Zn 100 Fus Lower
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 FLOOR PANEL 242UF UPPER SKIN HAS AREAS OF PULLED STRANDS.<[01] IDENTIFIED FLOOR PANEL 242UF MATERIAL IAW SRM 53-00-50-0I-1 FIGURE 6 TABLE 6.<BR><BR>DAMAGE EXCEEDS ALLOWABLE DAMAGE LIMITS IAW SRM 53-00-50-1A-1 PARAGRAPH 4.F. <BR><BR>DAMAGE IS REPAIRABLE IAW SRM 53-00-50-2R-1.;[02] REMOVED 25EA INSERTS IAW SRM 53-00-50-2R-1 PAR 3.B.<BR><BR>REMOVED DAMAGED PLIES ON UPPER SURFACE AND CLEANED AREA IAW SRM 53-00-50-2R-1 PARA 3.A-C AND PARA 3.E-F.;[03] VALIDATED REPAIR PER SRM 53-00-50-2R-1;[04] FABRICATED REPAIR PLIES FROM BMS 9-3 TY H2 CL7 STYLE 1581 LOT#1522395-2 IAW SRM 53-00-50-2R-1 PARA 3.K. <BR><BR>OK TO INSTALL REPAIR PLIES;[06] INSTALLED REPAIR PLIES USING BMS 8-201 TY IV LOT#1524651-1; VACUUM BAGGED; LEAK CHECK GOOD USING VACUUM GAUGE ID: E11543 DUE:09/2023 IAW SRM 53-00-50-2R-1 PARA 3.K-L.;[07] VERIFIED CORRECTIVE ACTION 6;[08] CURED REPAIR USING THERMOMETER ID: ATS2209 CAL DUE: 10/2023. UNBAGGED; TRIMMED AND SANDED IAW SRM 53-00-50-2R-1 PARA 3.M.;[09] LOCATED AND DRILLED INSERT HOLES; THEN INSTALLED AND CURED ALL THROUGH INSERTS USING BMS 5-107 LOT# AK2KP8383K-1 AND THERMOMETER ID: ATS2192 CAL DUE 08/2023 IAW SRM 53-00-50-2R-1 PARA 3.N.<BR><BR>INSTALLED MISSING BLIND INSERTS USING BMS 5-28 TY 19 LOT# AK2LP8414K AND SET TO CURE USING THERMOMETER ID: ATS2192 CAL DUE 08/2023 IAW SRM 53-00-50-2R-1 PARA 3.N.;

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