Service difficulty report · Vapor Barrier · Boeing 7378H4

Difficulty date
July 21, 2022
Submitted
August 9, 2022
Operation
Air carrier
Aircraft
N7880D
Make and model
Boeing 7378H4
Aircraft serial
34693
Aircraft time
39,762 hours, 29,299 cycles
Part
Vapor Barrier
Condition
Cracked
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

CUSTOMER REQUEST: R/H VAPOR BARRIER CRACK / [01] MEASUREMENTS;[02] REMOVED DAMAGED PLIES AND PREPARED AREA TO APPLY THE FABRIC REPAIR PLIES; DRILLED 0.25 DIAMETER STOP HOLE AT THE CRACK ENDS AND PERFORMED DRY OUT; NO WATER NOTE ON REPAIR AREA. REF B737-700 SRM 57-10-10-2R-2 PARAGRAPH 6; SRM 51-70-04-2R-10 PARAGRAPH 4 A;B AND C; SRM 51-70-04-2R-0 PARAGRAPH 4 A;B;D AND E.;[03] REMOVED DAMAGED PLIES AND PREPARED AREA TO APPLY THE FABRIC REPAIR PLIES SRM 51-70-04-2R-10 PARAGRAPH 4 B AND C.;[04] DRILLED 0.25 DIAMETER STOP HOLE AT THE CRACK ENDS REF B737-700 SRM 57-10-10-2R-2 PARAGRAPH 6.;[05] PERFORMED DRY OUT; NO WATER NOTE ON REPAIR AREA. SRM 51-70-04-2R-10 PARAGRAPH 4 B AND SRM 51-70-04-2R-0 PARAGRAPH 4 D.;APPLIED THE FABRIC REPAIR PLIES AT DAMAGED AREA SRM 51-70-04-2R-10 PARAGRAPH 4 D;E AND F. MATERIAL USED REPAIR FABRIC PO#: 1690463 AND LAMINATING RESIN PO: 1778994.;[11] PERFORMED VISUAL INSPECTION AND TAP TEST INSPECTION AROUND THE REPAIR AREA; NO DELAMINATION FOUND; NO DAMAGED NOTE AT COMPOSITE MATERIAL. REF NDT PART 1 51-05-01 PARAGRAPH 5. TAP TEST TOOL ST8842.;LOCATED AND DRILLED HOLES IN REPAIR AREA OF R/H VAPOR BARRIER AS PER SRM 51-40-05-0G-0.APPLIED PRIMER AND TEFLON PAINT VAPOR BARRIER AS PER B737 AMM 51-21-72-370-804 AND AMM 51-21-81-273-802;ACCOMPLISHED PERMANENT REPAIR OF DAMAGE RT VAPOR BARRIER AT BS 663 PER REF B737-700 SRM 51-70-04-2R-10

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