Service difficulty report · Transition Panel · Boeing 7377H4

Difficulty date
June 16, 2021
Submitted
July 6, 2021
Operation
Air carrier
Aircraft
N293WN
Make and model
Boeing 7377H4
Aircraft serial
36612
Aircraft time
45,647 hours, 27,262 cycles
Part
Transition Panel
Condition
Corroded
Location
Bs 747
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

DOT 61-034 AFT PIT STA 747+2 LBL22 TRANSITION PANEL UPPER SURFACE HAS CORROSION ; / [01] REMOVED CORROSION FROM BS 747+2 LBL 22; ORIGINAL T= .040'; LOSS OF .015' REMAINING .025' FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 FIG 103 DETAIL A-A TOOLING # 21461 CAL DUE 08/04/21; [02] VERIFIED INSPECTION CARD STEP 1. TRANSITION PANEL OUT OF LIMITS.; [03] VERIFIED MATERIAL TO FAB REPLACEMENT ZEE ANGLE AND SPLICE REPAIR AS BAC1496-377 7075-T62 ATAG A23339 IAW SRM 53-00-53-2R-5; [04] VERIFIED MATERIAL CARD STEP 3.; [05] STARTED FABRICATED LH TRANSITION PANEL Z-ANGLE; IAW SRM 53-0053-2R-5; 2 SPLICES FOR PANEL BREAKS STILLL NEED FABICATED; [06] VERIFIED PARTIAL FABRICATION; [07] COMPLETED FABRICARTION OF ZEE ANGLE AND SPLICES IAW SRM 53-00-53-2R-5; [08] VERIFIED COMPLETED FABRICATION IN STEP 7<BR>OK TO TREAT AND PRIME; [09] TREATED AND PRIMED REPLACEMENT ZEE ANGLE AND SPLICES IAW AMM 51-21-41 AMM 51-21-99; [10] VERIFIED CARD STEP 9.; [11] INSTALLED NUT PLATES IAW SRM51-40-10-2R-0. PUSH TEST TESTS GOOD. TOOL #42641 DUE 12/14/21; [12] VERIFIED ITEM 11; [13] TRANSITION PANEL INSTALLED ON TTG8Q004E0V5; [14] VERIFIED ITEMS 1-13 CW; [15] AUDIT CW

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