Service difficulty report · Shield · Boeing 7378H4

Difficulty date
April 23, 2023
Submitted
May 25, 2023
Operation
Air carrier
Aircraft
N8531Q
Make and model
Boeing 7378H4
Aircraft serial
63575
Aircraft time
19,946 hours, 9,687 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 COMPARTMENT RIGHT TRANSITION WEB CORRODED AT STA 847-867 RBL 20<[01] BLENDED 2 LIGHT SPOTS OF SURFACE CORROSION ON R/H TRANSITION ANGLE AT STA. 847+4? AND STA. 847+9? PER SRM 51-10-02. REMOVED .003? OF MATERIAL. REMAINING THICKNESS IS .037?DAMAGE REMOVAL WITHIN LIMITS PER SRM 53-00-53-1A-2.;[02] CORRECTIVE ACTION #1 ENTERED IN ERROR.;[03] BLENDED MULTIPLE SPOTS ON R/H TRANSITION SHIED FROM STA. 847 TO STA. 867. DEEPEST MATERIAL REMOVED IS .010. REMAINING THICKNESS IS .040. DAMAGE REMOVAL IS OUT OF LIMITS PER SRM 53-00-53-1A-2. REMOVED SHIELD FROM STA. 847 TO STA. 867 FOR REPLACEMENT PER SRM 51-40-02.;[04] VERIFIED OUT OF LIMITS C/A 3.;[05] OK TO INSTALL NEW AFT PIT SHIELD ASY;[06] INSTALLED NEW 146A8127Y10ATSMRO (SHIELD; AFT PIT SHIELD ASY) PER SRM 51-40-02

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