Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
June 27, 2021
Submitted
August 5, 2021
Operation
Air carrier
Aircraft
N750SA
Make and model
Boeing 7377H4
Aircraft serial
29802
Aircraft time
75,691 hours, 44,551 cycles
Part
Stringer
Condition
Cracked
Location
Bs 536 S26r
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

FCB STR-26R CRACKED IN DISTRIBUTION BAY AT BS 536 (MARKED) ; / [01] EVALUATED CRACK MEASUREMENTS ON FCB STRINGER 26R BS 536. STRINGER DAMAGE FOUND TO BE OUT OF LIMITS I.A.W SRM 53-00-03-1A-1 FIGURE 103; DETAIL A.; [02] VERIFIED; EVALUATED CRACK MEASUREMENTS ON FCB STRINGER 26R BS 536. STRINGER DAMAGE FOUND TO BE OUT OF LIMITS I.A.W SRM 53-00-03-1A-1 FIGURE 103; DETAIL A.; [04] VERIFIED SRM 53-00-03-2R REPAIR 2 IS APPLICABLE FOR STRINGER REPAIR BS 536; STRINGER 26R.[07] REMOVED NECESSARY FASTENERS IN THE DAMAGED STRINGER REPAIR SECTION BETWEEN STA 500D -540 STR 26R. I.A.W SRM 53-00-03-2R-1 STEP 4A.; [08] REMOVED STRINGER CLIP (FOM) PN 143A1010-48 AT BS 520; STR 26R I.A.W SRM 53-00-03-2R-1 STEP 4A.; [09] CUT AND REMOVED THE DAMAGED STRINGER SECTION BETWEEN BS 500D+12.5' TO BS 536; STR- 26R. I.A.W SRM 53-00-03-2R-1 STEP 4B.; [10] VERIFIED STRINGER SECTION CUT AND REMIOVED BETWEEN BS 500D+12.5' TO BS 536; STR- 26R. I.A.W SRM 53-00-03-2R-1 STEP 4B.; [11] COMPLETED STEP 1; [12] RECEIVED STRINGER SECTION P/N: HFAB53-STR-011 HEAT TREATED TO CONDITION T62 ; P.O. # 829207 ; LOT:1462871-1 AND RECEIVED HAT SECTION P/N: HFAB53-HS-011 HEAT TREATED TO CONDITION T62; P.O. # 829208 ; LOT:1462651-1 ; FABRICATE STRINGER SECTION FROM 7075-T6 0.045' AND HAT SECTION FROM 7075-T6 0.050' IAW SRM 53-00-53-2R-1

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