Service difficulty report · Web · Boeing 7377H4

Difficulty date
June 8, 2023
Submitted
July 17, 2023
Operation
Air carrier
Aircraft
N963WN
Make and model
Boeing 7377H4
Aircraft serial
36676
Aircraft time
38,123 hours, 23,431 cycles
Part
Web
Part number
UNKNOWN
Condition
Corroded
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

CORROSION ON AFT CARGO BAY DOOR CUT-OUT SUB-THRESHOLD WEB AT STA 787+16; 807+10 & +12; 827+6; & +9; WL 156; RBL 27<[01] VERIFIED SRM 53-60-15-0I-1 FOR IDENTIFICATION AND SRM 53-60-15-1A-1 FOR ALLOWABLE DAMAGE.05] LOCATED AND DRILLED NEW ACB DOOR CUT-OUT SUB-THRESHOLD WEB IAW SRM 51-40-05-0G-0 AND DWG#146A8340.;[06] VERIFIED STEP # 5;[07] OK TO ENAMEL;[08] COMPLETED STEPS 1-5; VERIFIED CORRECTIVE ACTION 7 OK TO ENAMEL;[09] APPLIED ONE COAT OF BMS10-11 TYPE II ENAMEL (P/N BAC702GL) AT SUB-THRESHOLD WEB BS 794.37- BS 847 RBL27 WL156 IAW SOPM 20-41-02.<BR>OK TO APPLICATION CIC;[10] VERIFIED CORRECTIVE ACTION 9; OK TO APPLICATION CIC;[11] APPLIED ONE LAYER OF BMS 3-23; TYPE II COMPOUND INHIBITING CORROSION BS794.367 TO BS 847 RBL 27 WL 156 I.A.W SRM 51-20-01.<BR>TIME OF APPLICATION :15-JUN-2023 21:44 UTC;[12] OK TO INSTALL;[13] VERIFIED CORRECTIVE ACTION 11 AND 12; OK TO INSTALL.;[14] INSTALLED ON AFT CARGO BAY DOOR CUT-OUT SUB-THRESHOLD WEB AT BS 794.36 TO BS 847 RBL 27 IAW SRM 51-40-02 AND DWG 146A8340;[15] VERIFIED CORRECTIVE ACTION 14<BR><BR>VERIFIED MEASUREMENT TABLE;[16] JOB COMPLETE

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