Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
April 26, 2023
Submitted
May 25, 2023
Operation
Air carrier
Aircraft
N959WN
Make and model
Boeing 7377H4
Aircraft serial
36674
Aircraft time
38,285 hours, 23,370 cycles
Part
Stringer
Condition
Cracked
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

CRACKED STR IN AFT AREA OF FWD CARGO BAY; STR 26R; BS 535; WL 153.<[01] VERIFIED THE APPLICABILITY OF SRM 53-30-03-0I-1 ; SRM 53-00-03-1A-1 ; AND SRM 53-00-03-2R-1 REPAIR 1[06] RECEIVED NEW REPLACEMENT STRINGER FROM MACHINE SHOP FORMED 1EA HFAB53-STR-011; LOT#1526119-1;7075T0#0.045'CLAD HEAT TREATED TO T62 PER BAC 5602 AND DYE PENETRANT INSPECTED PER BAC5423; CUSTOMER RO#917021-SWA; AND HAT SECTION MADE FROM BAC1498-132#7075T62 CLAD LOT#1503861-1; BOTH ANGLES LOCATED AND DRILLED AT BS 500D+8 -BS38 STR 26R IAW SRM 53-00-03-2R-1 OK TO TREAT AND PRIME THE REPAIR AREA AND CUT OUT;[07] CORRECTION ON CORRECTIVE ACTION-6; RECEIVED NEW REPLACEMENT STRINGER FROM MACHINE SHOP FORMED 1EA HFAB53-STR-011; LOT#1526119-1; 7075T0#0.045'CLAD HEAT TREATED TO T62 PER BAC 5602 AND DYE PENETRANT INSPECTED PER BAC5423; CUSTOMER RO#917021-SWA; AND HAT SECTION MADE FROM BAC1498-132#7075T62 CLAD LOT#1503861-1; BOTH ANGLES LOCATED AND DRILLED AT BS 500D+8 -BS538 STR 26R IAW SRM 53-00-03-2R-1 OK TO TREAT AND PRIME THE REPAIR PARTS AND CUT OUT.

More about the Boeing 737-7H4