Service difficulty report · Panel · Boeing 7377H4

Difficulty date
April 29, 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
Panel
Part number
194CL
Condition
Deteriorated
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 194CL OUTER SKIN IS DISBONDED. (MARKED) / REMOVED 1' DIA OF OUTER SKIN AND PARTIAL DEPTH CORE; CLEANED REPAIR AREA IAW SRM 51-70-05-2R-2 PARA 4.A-B;[05] VERIFIED CORRECTIVE ACTIONS 1-4<BR><BR>VALIDATED REPAIR PER SRM 51-70-05-2R-2;[06] POTTED REPAIR AREAS WITH BMS 5-28 TY 7 POTTING LOT AK1P9146K AND SET FOR ROOM TEMP CURE IAW SRM 51-70-05-2R-2 PARA 4.D 'NOTE' AND SRM 51-70-05-2R-11 PARA 4.A-B;[07] CURED POTTING; SANDED POTTING TO CONTOUR; PREPPED AND CLEANED REPAIR AREA; FABRICATED REPAIR PLIES FROM BMS 8-79 LOT 1489137-1 AND BMS 5-129 LOT 1482238-1; 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.F-I<HOT BONDER ID NCX000526 SN 12051216 DATE 10/2022;[08] CURED REPAIR; UNBAGGED AND LIGHTLY SANDED IAW SRM 51-70-05-2R-2 PARA 4.I AND 4.K POST REPAIR UT INSPECTED PER 737NDT PART 4 51-00-02. NO DEFECTS FOUND. TOOL E650 ATS2031 DUE 03/23.;[11] 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 ATS2209 SN 43300739WS DATE 10/2022<BR>FLUKE 77 MULTIMETER ID ATS1658 SN 34000350 DATE 03/2023<BR><BR>REFINISHED REPAIR AREA IAW AMM 51-21-99-300-802 PARA 3.C(1)(A-E)>REPAIRED OUTER SURFACE DISBOND ON PANEL 194CL IAW SRM 51-70-05-2R-2 AND SRM 51-70-05-2R-11;

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