Service difficulty report · Skin · Boeing 7377H4

Difficulty date
April 26, 2023
Submitted
June 1, 2023
Operation
Air carrier
Aircraft
N285WN
Make and model
Boeing 7377H4
Aircraft serial
32536
Aircraft time
51,630 hours, 31,054 cycles
Part
Skin
Condition
Debonded
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

PANEL 194FR OUTER SKIN HAS A DISBOND. (MARKED)<[01] IDENTIFIED MATERIAL OF PANEL 194FR IAW SRM 53-60-70-0I-1 FIGURE 1-2; ITEM 2; TABLE 2<BR><BR>DAMAGE IS OUT OF ALLOWABLE DAMAGE LIMITS IAW SRM 53-60-70-1A-1 TABLE 101; PARA 4.A(4)<BR><BR>REPAIR TO BE ACCOMPLISHED IAW SRM 51-70-05 PER SRM 53-60-70-2R-1 PARA 4.B(1) AND 4.D; TABLE 201<BR><BR>VISUALLY EXAMINED EXTENT OF DAMAGE; TAP TESTED - DISBOND NOTED; REMOVED 1.1' X 1.55' DIA OF OUTER SKIN AND PARTIAL DEPTH CORE; CLEANED REPAIR AREA IAW SRM 51-70-05-2R-2 PARA 4.A-B;[05] CURED POTTING AT ROOM TEMP; SANDED POTTING TO CONTOUR; CLEANED REPAIR AREAS; FABRICATED REPAIR PLIES FROM BMS 8-79 LOT 1520138-1 AND BMS 5-129 LOT 1513774-1; INSTALLED REPAIR PLIES; VACUUM BAGGED AND SET FOR CURE IAW SRM 51-70-05-2R-11 PARA 4.B-D AND SRM 51-70-05-2R-2 PARA 4.D NOTE AND PARA 4.G-I<BR><BR>HOT BONDER ID ATS883 DATE 10/2023;[06] CURED REPAIR; UNBAGGED AND LIGHTLY SANDED IAW SRM 51-70-05-2R-2 PARA 4.I AND 4.K;[07] VERIFIED CORRECTIVE ACTIONS 4-6;[08] REQUESTING POST CURE NDI OF REPAIR AREA IAW SRM 51-70-05-2R-2 PAR 4.J.[10] APPLIED AND CURED CONDUCTIVE COATING; RESISTANCE CHECK 'GOOD' IAW AMM 51-21-71-370-801 PARA 3.D(2-4) AND 3.D(7)(A)<BR><BR>FLUKE 62 IR THERMOMETER ID ATS2208 DATE 10/2022<BR>FLUKE 77 MULTIMETER ID ATS1499 DATE 11/2023<BR><BR>REFINISHED REPAIR AREA IAW AMM 51-21-99-300-802 PARA 3.C(1)(A-E)<BR><BR>REPAIRED DELAMINATION ON OUTER SURFACE ON PANEL 194FR IAW SRM 51-70-05-2R-2 AND SRM 51-70-05-2R-11

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