Service difficulty report · Plate · Boeing 7378H4

Difficulty date
May 28, 2023
Submitted
June 27, 2023
Operation
Air carrier
Aircraft
N8536Z
Make and model
Boeing 7378H4
Aircraft serial
63571
Aircraft time
20,012 hours, 9,739 cycles
Part
Plate
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

AFT CARGO L/H SIDEPLATE HAS CORROSION AT FASTENER HOLES LBL 21; STA.727F-727G<[01] REMOVED CORROSION AFT CARGO L/H SIDEPLATE AT FASTENER HOLES LBL 21; STA.727F-727G. MAX MATERIAL REMOVED IS 0.008? ; MAX ALLOWED 0.004?. REMAINING THICKNESS IS .032? FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2;[02] VERIFIED 1. NICHOLAS AYLOR (TECHNICIAN); 01-JUN-2023 06:54 UTC<BR>REMOVED CORROSION AFT CARGO L/H SIDEPLATE AT FASTENER HOLES LBL 21; STA.727F-727G. MAX MATERIAL REMOVED IS 0.008? ; MAX ALLOWED 0.004?. REMAINING THICKNESS IS .032? FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-;[03] REMOVED L/H TRANSITION ANGLE ASSY FROM STA 727 +4 - 847 PER SRM 51-40-02;[04] LOCATED AND DRILLED NEW LH TRANSITION REPAIR SECTION FROM STA 727D +10.2 - 847. SPLICE SECTIONS AT STA 727D + 10.2 AND 747 +9.5 PER SRM 53-00-53-2R-5;[05] VERIFIED CORRECTIVE ACTION #4. OK TO TREAT AND PRIME.;[06] ALODINED AND PRIMED REPAIR PARTS PER AMM 51-21-72-370-804;[07] REINSTALLED L/H TRANSITION ANGLE FROM STA 727+4 - 727D+10.2 PER SRM 51-40-02. INSTALLED NEW REPAIR PARTS FROM STA 727D+10.2 - 847 (SPLICE SECTIONS AT STA 727D + 10.2 AND 747 +9.5) PER SRM 53-00-53-2R-5;[08] VERIFIED C/A #7.;[09] VERIFIED ALL STEPS ARE SIGNED OFF.

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