Service difficulty report · Vapor Barrier · Boeing 7377BD

Difficulty date
February 22, 2023
Submitted
April 4, 2023
Operation
Air carrier
Aircraft
N556WN
Make and model
Boeing 7377BD
Aircraft serial
33936
Aircraft time
37,398 hours, 21,958 cycles
Part
Vapor Barrier
Condition
Cracked
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

CRACK ON R/H BS 663 VAPOR BARRIER BULKHEAD PRESSURE DECK WEB AT BS 663 RBL 41 WL 160.(MARKED)<[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(1)<BR>REMOVED FINISH AND PREPPED DAMAGED AREA AT (3EA) LOCATIONS WITH THE LARGEST MEASURING 21.5'X 0.10'; CLEANED; WITH NO CONTAMINATION NOTED IAW SRM 51-70-04-2R-10 PAR.4 A-C;.FABRICATED REPAIR PLIES FOR FWD SURFACE USING BMS 9-3H2 LOT#1513216-1 IAW SRM 51-70-04-2R-10 PARA 4.D. INSTALLED FWD SURFACE REPAIR PLIES USING BMS 8-301CL1 LOT#JH2EAA8895; VACUUM BAGGED; LEAK CHECK GOOD WITH VACUUM GAUGE ID:E11543 CAL DUE 09/2023 AND SET TO CURE IAW SRM 51-70-04-2R-10 PARA 4.D-F.; COMPLETED CURE USING HEAT LAMP MONITORED WITH THERMOMETER ID:ATS2209 CAL DUE 10/2023; UNBAGGED IAW SRM 51-70-04-2R-10 PARA 4.F.; FABRICATED REPAIR PLIES FOR AFT SURFACE USING BMS 9-3H2 ST1581 LOT#1513216-1 IAW SRM 51-70-04-2R-10 PARA 4.INSTALLED AFT SURFACE REPAIR PLIES USING BMS 8-301CL1 LOT#JH2EAA8895; VACUUM BAGGED; LEAK CHECK GOOD WITH VACUUM GAUGE ID:ATS2107 DUE:04/2023 IAW SRM 51-70-04-2R-10 PARA 4.D-E;CURED PLIES; UNBAGGED AND LIGHTLY SANDED IAW SRM 51-70-04-2R-10 PARAGRAPH 4.F AND H. PERFORM POST CURE NDI IAW SRM 51-70-04-2R-10 PARAGRAPH 4.G; UT INSPECTED REPAIR AREAS PER NDTM PT4 51-00-02; NO DISBONDS NOTED<BR>EQUIP ID ATS843 DUE 06/2023;[17] REFINISHED THE REPAIR AREAS IAW SRM 51-70-04-2R-10 PARAGRAPH 4.H.

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