Service difficulty report · Attach Angle · Boeing 7377H4

Difficulty date
April 25, 2023
Submitted
May 25, 2023
Operation
Air carrier
Aircraft
N959WN
Make and model
Boeing 7377H4
Aircraft serial
36674
Aircraft time
38,285 hours, 23,370 cycles
Part
Attach Angle
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 FRAME SPLICE ATTACH ANGLE AT BS 787 STRINGER BETWEEN 24R-25R.(MARKED)<[01] DAMAGE FOUND AT AFT CARGO BAY FRAME SPLICE ANGLE BS 787 BETWEEN STRINGER 24R-25R FOUND TO BE OUT OF LIMIT DUE TO NO LIMIT ON SRM; PART WILL BE REPAIRED BY REPLACEMENT IAW SRM 51-10-02-0G-0 PAR 9C;[02] REMOVED AFT CARGO BAY FRAME SPLICE ANGLE BS 787 BETWEEN STRINGER 24R-25R IAW SRM 51-40-02-0G--0;[03] VERIFIED CORRECTIVE ACTION 1; 2 AND MEASUREMENT TABLE;[04] FABRICATED NEW AFT CARGO BAY FRAME SPLICE BS 787 BETWEEN STR 24R-25R MADE FROM 7075T0#0.063' LOT#1375480-1 IAW SRM 51-30-01-0G-0 AND DWG#146A1262;[05] VERIFIED CORRECTIVE ACTION 4;[06] RECEIVED NEW FORMED ANGLE FROM HEAT AND TREATED LOT#1526104-1 LOCATED AND DRILLED PER SRM 51-40-02 OK TREATED PER SOPM 20-41-02 OK TO PRIME;[07] VERIFIED CORRECTIVE ACTION #6<BR> OK TO PRIME GIVEN;[08] APPLIED CHEMICAL CONVERSION COATING AND PRIMED THE REPAIR PART IAW SRM 51-20-01-0G-0 AND SOPM 20-41-02 OK TO INSTALL REPAIR PART;[09] VERIFIED CORRECTIVE ACTION #8<BR> OK TO INSTALL REPAIR PART GIVEN;[10] INSTALLED FRAME SPLICE AT BS 787 BETWEEN STR 24R-25R IAW SRM 51-40-02-0G-0 AND DWG#146A1262;[11] VERIFIED CORRECTIVE ACTION #10;[12] TASK COMPLETE

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