Service difficulty report · Support · Boeing 7378H4

Difficulty date
October 31, 2022
Submitted
November 17, 2022
Operation
Air carrier
Aircraft
N8517F
Make and model
Boeing 7378H4
Aircraft serial
63594
Aircraft time
19,865 hours, 9,440 cycles
Part
Support
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

FWD CARGO BILGE SIDEPLATE SUPPORT Z STA 500B+15 TO STA 500I RBL 21 S-26R WL 156 HAS CORROSION AS MARKED. 124-003 / [01] REMOVED CORROSION ON Z CHANNEL FROM STA 500B TO STA 500I RBL 21 S-26R WL 156. MATERIAL REMOVED 0.010'; MATERIAL REMAINING 0.030'; ORIGINAL MATERIAL 0.040'; Z CHANNEL AFFECTED AREAS FOUND OUT OF LIMITS. IN REFERENCE WITH SRM 53-00-53-1A-2.;[02] REMOVED CORROSION ON Z CHANNEL FROM STA 500B TO STA 500I RBL 21 S-26R WL 156. MATERIAL REMOVED 0.010'; MATERIAL REMAINING 0.030'; ORIGINAL MATERIAL 0.040'; Z CHANNEL AFFECTED AREAS FOUND OUT OF LIMITS. IN REFERENCE WITH SRM 53-00-53-1A-2. TOOL USED : B/C 171960 ; CAL DUE: 07-MARCH-2023.;[03] LOCATED AND DRILLED NEW Z SIDE PLATE FROM BAC1496-444 7075-T62 PO# 1747909 IRW SRM 51-40-05;[04] VERIFIED STEPS 1; 2 AND 3<BR>OK TO TREAT AND PRIME;[05] TREATED PRIMED NEW Z SIDEPLATE IRW AMM 51-21-41-370-803;AMM 51-21-72-370-804;[06] VERIFIED STEP 5;OK TO INSTALL NEW Z SIDE PLATE FROM STA 500B TO STA 500I RBL 21 S-26R W/L 156;[07] INSTALLED NEW Z SIDE PLATE FROM STA 500A TO STA 500I RBL21 IRW SRM 51-40-02;[08] VERIFIED STEP 7

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