Service difficulty report · Bulkhead Web · Boeing 7377H4

Difficulty date
June 21, 2021
Submitted
August 4, 2021
Operation
Air carrier
Aircraft
N940WN
Make and model
Boeing 7377H4
Aircraft serial
36900
Aircraft time
39,596 hours, 24,067 cycles
Part
Bulkhead Web
Condition
Cracked
Location
Bs 663
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

L/H B.S 663 VAPOR BARRIER IS CRACKED ; / [01] REMOVED CHORD AND 3 EA BRACKETS TO FACILITATE REPAIR.<BR>IAW SRM 51-40-02-0G-0 PARA 4 E. & FIGURE 8; [02] REMOVED 5 EA. DOUBLERS AND 2 EA. STIFFENERS IAW SRM 51-40-02-0G-0 PARA 4 STEP E; PARA 7 STEP D AND AMM 51-31-00-100-802 PARA 17 STEP E.; [03] REMOVED LARGE BRACKET TO FACILITATE REPAIR PER SRM 51-40-02-0G-0 PAR.7D AND AMM 51-31-00-100-802 PAR.17 STEP E.; [04] IDENTIFIED MATERIAL ID PER SRM 57-10-10-0I-2 FIG.2; SHT.1; TABLE 2; AND ITEM 4. FOUND CRACK TO BE OUT OF ALLOWABLE DAMAGE LIMITS PER SRM 57-10-10-1A-2 PAR.4D1. A REPAIR WILL BE ACCOMPLISHED PER SRM 51-70-04 REPAIR 10 AS DIRECTED PER SRM 57-10-10-2R-2 PAR.1C AND NOTE.; [05] REMOVED DAMAGE ON FWD. SIDE APPROX. 4.0' X 22.0' AND ON AFT. SIDE APPROX. 2.0' X 22' WITH NO MOISTURE CONTAMINATION NOTED PER SRM 51-70-04 2R-10 PAR.4 STEPS A-C.; [06] VERIFIED ITEM 4 AND 5 ONLY; MATERIAL ID; OUT OF LIMITS; DAMAGE REMOVED; NO MOISTURE CONTAMINATION; OK TO PROCEED; [07] FABRICATED REPAIR PLIES FORM BMS9-3 STYLE 1581 TYPE H2 LOT#1458851-1 IAW SRM 51-70-04-2R-10 PARA 4 STEP D OK TO INSTALL REPAIR PLIES.; [26] REPAIRED CRACK IN B.S. 663 VAPOR BARRIER IAW SRM 51-70-04-2R-10 JOB COMPLETE; [27] VERIFIED BS 663 VAPOR BARRIER WAS REPAIRED PER SRM 51-70-04-2R-10; [28] VERIFIED BS 663 VAPOR BARRIER WAS REPAIRED PER SRM 51-70-04-2R-10

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