Service difficulty report · Bulkhead · Boeing 7377H4

Difficulty date
March 8, 2023
Submitted
April 18, 2023
Operation
Air carrier
Aircraft
N281WN
Make and model
Boeing 7377H4
Aircraft serial
36528
Aircraft time
51,516 hours, 31,045 cycles
Part
Bulkhead
Condition
Delaminated
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

PREVIOUS REPAIR STARTS TO DELAM AT LOWER L/H COMPOSITE BULKHEAD AT BS663 LBL33 WL161.<[01] IDENTIFIED IAW SRM 57-10-10-0I-2 FIGURE 2 TABLE 2 ITEM 4 <BR><BR>DAMAGE EXCEEDS ALLOWABLE DAMAGE LIMITS IAW SRM 57-10-10-1A-2 PAR.4 D(5)<BR><BR>DAMAGE TO BE REPAIRED IAW SRM 51-70-04-2R-10 AS DIRECTED BY SRM 57-10-10-2R-2 PAR.1 C(NOTE)<BR><BR>REMOVED PREVIOUS REPAIRS AND DAMAGED PLIES ON MULTIPLE AREAS; WITH THE LARGEST MEASURING 5'X3.5'; CLEANED; WITH NO CONTAMINATION NOTED IAW SRM 51-70-04-2R-10 PAR.4 A-C;[02] VALIDATED REPAIR PER SRM 51-70-04-2R-10;[03] VERIFIED CORRECTIVE ACTIONS 1 AND 2<BR><BR>VERIFIED MEASUREMENTS TABLE<BR><BR>VALIDATED REPAIR PER SRM 51-70-04-2R-10;[04] FABRICATED FWD SURFACE REPAIR PLIES USING BMS9-3 ST1581 LOT#1520142-1 IAW SRM 51-70-04-2R-10 PAR.4 D<BR><BR>OK TO INSTALL;[05] VERIFIED CORRECTIVE ACTION 4;[06] INSTALLED REPAIR PLIES USING BMS8-301 CL1 LOT#JH2EAA8895; VACUUM BAGGED; LEAK CHECKED GOOD USING VACUUM GAUGE ID:ATS2441 DUE:08/2023; AND SET TO CURE USING HOT BONDER ID:ATS2802 DUE:10/2023 IAW SRM 51-70-04-2R-10 PAR.4 D-F;[07] INSPECTED AND VERIFIED CORRECTIVE ACTION 6.;[08] CURED PLIES AND UNBAGGED PLIES IAW SRM 51-70-04-2R-10 PARAGRAPH 4.F;[09] FABRICATED AFT SURFACE REPAIR PLIES USING BMS9-3 ST1581 LOT#1520142-1 IAW SRM 51-70-04-2R-10 PAR.4 D<BR><BR>OK TO INSTALL

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