Service difficulty report · Angle · Boeing 7377H4

Difficulty date
April 2, 2022
Submitted
May 2, 2022
Operation
Air carrier
Aircraft
N475WN
Make and model
Boeing 7377H4
Aircraft serial
32474
Aircraft time
59,744 hours, 35,276 cycles
Part
Angle
Condition
Cracked
Location
Fuselage
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

BS 500A FRAME CRACKED AT FASTENER HOLE STR 26 L/H / TRIMMED OUT THE DAMAGED PART OF THE FRAME AT BS 500A LBL 24 L=1' W=1' IAW 53-30-07-0I-1 AND 53-30-07-2R-1 STEP 4. C. (1);[03] TRIMMED OUT THE DAMAGED PART OF THE FRAME AT BS 500A LBL 24 L=1' W=1' IAW SRM 53-30-07-2R-1 STEP 4. C. (1);[05] NDT HFEC INSPECTED TRIM OUT AND HOLES IAW SRM 53-30-07-2R-1 AND 737 NDTM PART 6 51-00-00 PROC 23 AND PROC 16; NO CRACKS NOTED AT TRIM OUT. SEVERAL DAMAGED/OUT OF ROUND HOLES NEED REPAIRED THEN HOLE NDT AGAIN. ID ISOOO450 SN N500D000M120071.;[06] PERFORMED OVERSIZE HOLES ON DAMAGED HOLES 1/32 AS REQUIRED ; FINAL DIAMETER 0.218' IAW SRM 51-40-05 FIGURE 3 TABLE A-BRECEIVED ; FORMED AND HEAT TREATED ; ITEM 1 REPAIR DOUBLER ON CUSTOMER RO NO : 862987-SWA ;MATERIAL USED 7075 T0 ; 0.063' LOT#1449291-1 <BR>IAW SRM 53-30-07-2R-1 REPAIR 1 LOCATED AND DRILLED -1 REPAIR ANGLE IAW SRM 53-30-07-2R-1 REPAIR 1 ALTERNATIVE 1;[14] REPAIR PART ITEM 2 STRINGER CLIP DOCUMENTED ON CUST SYSTEM ID:TTG8Q00BNPG1;FABRICATED; LOCATED AND DRILLED FILLER AND SHIM AT B/S 500A STR 26 L/H MATERIAL USED : 7075T6 #0.012' LOT#1086450 IAW SRM 53-30-07-2R-1 REPAIR 1 ALTERNATIVE 1<BR>OK TO APPLY PRIMER] OK TO INSTALL FILLER; SHIM ; NEW CLIP AND NEW CLIP; OUT OF SEQUENCE: APPLIED CHEMICAL CONVERSION AND PRIMER ON FILLER AND SHIM IAW SRM 53-30-07-2R-1 REPAIR 1 ALTERNATIVE 1 INSTALLED REPAIR PARTS AT FCB BS 500A BTW LBL 18 TO LBL 25 IAW SRM IAW SRM 53-30-07-2R-1 REPAIR 1 ALTERNATIVE 1. AND UPDATE STEP 1

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