Service difficulty report · Stringer · Boeing 7377BD

Difficulty date
April 18, 2022
Submitted
May 10, 2022
Operation
Air carrier
Aircraft
N7736A
Make and model
Boeing 7377BD
Aircraft serial
35109
Aircraft time
50,096 hours, 25,534 cycles
Part
Stringer
Condition
Cracked
Location
Fwd Cargo Bay
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

CRACK ON FWD CARGO BAY BS 540 L/H STRINGER 23. / [01] CUT AND REMOVED THE DAMAGED PART OF FCB STR 23L BETWEEN BS 500D +11 AND BS 540 IAW SRM 53-00-03-2R-1 REPAIR 1;PERFORMED A 0.040' INSURANCE CUT AT FCB STR 23L BS 500D+11 IAW SRM 53-00-03-2R-1 REPAIR 1;[05] VERIFIED CORRECTIVE ACTION ITEMS 1; 2 AND 4. DAMAGE IS REMOVED AND AN INSURANCE CUT HAS BEEN MADE.<BR>CONFIRMED VALIDITY OF SRM 53-00-03-2R-1 REPAIR 1.;[06] UPDATED STEPS 1 AND 2;[07] CORRECTED BODY STATION;[08] RECEIVED NEW FCB STR 23L BS 500D+11 - BS 540 REPLACEMENT SECTION FROM O.S.S ON CUSTOMER R/O # 865898-SWA ; MATERIAL USED 7075T0 ; 0.036' LOT #1482127-1 HEAT TREATED TO T62 ; AND FABRICATED NEW HAT SECTION SPLICE FROM EXTRUSION P/N 6978188-12 LOCATED DRILLED AND APPLIED A CHEMICAL CONVERSION COATING TO ALL REPAIR PARTS IAW SRM 53-00-03-2R-1 REPAIR 1 OK TO PRIME VERIFIED PART FABRICATION AND DRILL UP. OKAY TO APPLY PRIMER GIVEN.;PRIMED ALL REPAIR PARTS STR 23L REPLACEMENT SECTION AND HAT SECTION SPLICE BETWEEN BS 500D AND BS 540 IAW SRM 53-00-03-2R-1 REPAIR 1 OK TO INSTALL; INSTALLED ALL REPAIR PARTS AT DISCREPANCY AREA PER SRM 51-40-02-0G-0; SRM 53-00-03-2R-1 REPAIR 1; EA# 22-153-01178;[14] VERIFIED COMPLETION OF STEPS 1 AND 2 AND CORRECTIVE ACTION 13 FOR REPAIR OF STR23L BS510-540 SRM 51-40-02-0G-0; SRM 53-00-03-2R-1 REPAIR 1; EA# 22-153-01178;'THE DAMAGE WAS REPAIRED PER 737-700 SRM 53-00-03-2R-1 (REPAIR 1) AND EA 22-153-01178'

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