Service difficulty report · Panel · Boeing 7377H4

Difficulty date
December 1, 2021
Submitted
December 3, 2021
Operation
Air carrier
Aircraft
N478WN
Make and model
Boeing 7377H4
Aircraft serial
33989
Aircraft time
58,884 hours, 34,869 cycles
Part
Panel
Condition
Corroded
Location
Fuel
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

FUEL PANEL 532CB HAS FRETTING CORROSION AT RING MATTING SURFACE. ; / [01] REMOVED CORROSION IAW B737 SRM; 57-20-01-2R-1. REPAIR 1; [02] VERIFIED STEP 1 C/W; [03] EVALUATED MATERIAL LOSS ON PANEL 532CB; LOSS OF .005. WITHIN LIMITS IAW B737 SRM 57-20-01-2R-1. REPAIR 1. FIGURE 203; VIEW B-B. AAR TOOL #21461. CAL DUE 08/11/22; [04] FLAP PEENED BLENDED AREAS ON PANEL 532CB IAW B737 SRM 57-20-01-2R-1 REPAIR 1; [05] VERIFIED STEPS 3 AND 4 C/W<BR><BR>OK TO TREAT AND PRIME; [06] TREATED BLENDED AREAS IAW B737 SRM 57-20-01-2R-1.REPAIR 1. PANEL 532CB.; [07] COMPLETED REPAIR OF PANEL 532CB IAW SRM 57-20-01-1 REPAIR 1. ALL STEPS 1-7 COMPLETE.; [08] VOIDING OK TO PRIME ON STEP 5 PER SRM 57-20-01-2R-1 STEP 4K<BR><BR>ALL WORK C/W<BR>AUDIT C/W

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