Service difficulty report · Shield · Boeing 7378H4

Difficulty date
September 27, 2022
Submitted
October 19, 2022
Operation
Air carrier
Aircraft
N8644C
Make and model
Boeing 7378H4
Aircraft serial
35973
Aircraft time
26,784 hours, 12,542 cycles
Part
Shield
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

AFT CARGO BAY SHIELD FWD OF CARGO DOOR HAS MULTIPLE AREAS OF CORROSION AT NUT PLATE HOLES BS767 TO BS794 RBL22 WL156 / [01] EVALUATED CORROSION ON SHIELD BS 767 TO 794 RBL 22 WL 156; FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS IN THE SRM AND REQUIRES REPLACEMENT PER SRM 51-10-02-0G-0;[02] VERIFIED CORRECTIVE ACTIONS STEP 1 AND MEASUREMENTS TABLE.;[03] REMOVED SHIELD ACB BS767 TO BS794 RBL22 WL156 PER SRM 51-40-02-0G-0;[04] LOCATED AND DRILLED NEW SHIELD ACB BS767 TO BS794 RBL21 WL156 PER SRM 51-40-05-0G-0 AND DWG 146A0081 AND OK TO INSTALL.;[05] VERIFIED CORRECTIVE ACTION 4;[06] INSTALLED NEW SHIELD ACB BS767 TO BS794 RBL21 WL156 PER SRM 51-40-02-0G-0 AND DWG 146A0081.;[07] VERIFIED CORRECTIVE ACTION 6;[08] VERIFIED MEASUREMENT TABLE

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