Service difficulty report · Buttstrap · Boeing 737824

Difficulty date
May 24, 2021
Submitted
May 24, 2021
Operation
Air carrier
Aircraft
N76523
Make and model
Boeing 737824
Aircraft serial
37101
Aircraft time
34,535 hours, 12,003 cycles
Part
Buttstrap
Condition
Worn
Location
Bs 887 S27l/R
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

BUTT STRAP AT STA.887 BETWEEN S-27L AND S-27R IS WORN THROUGH. REMOVED SHEAR TIE AT STA887 STR27L TO 26L REF SRM 51-40-02 REMOVED SHEAR TIE STA887 FROM STR27R TO 26R REF SRM 51-40-02 REMOVED INTERCOSTAL FROM STA887 TO 867 BETWEEN STR27L AND STR26L REF SRM 51-40-02 PEREFORMED HFEC OF TRIMED REA PER AVO ESC200513-0523-1A PARA A STEP 15 NO CRACKS NOTED AT THIS TIME CUT BUTT STRAP PER AVO ECS200513-0523-1A PARA A STEP 14 AND ACP HFEC IAW NTM 51-00-00 PART 6 NO DEFECTS NOTED INCLUDING DAMAGE REMOVAL PERFORMED NEW CUT ON BUTT STRAP AND HFEC CUT AND NEW REMOVED HOLES PER AVO ESC200513-0523-1D PARA A STEP 14 AND STEP 16 ALL CHECKED OK PERFOMED HFEC INSPECTIONS REF AVO ESC200513-0523-1D STEPS 15 AND HOLE PROBED FASTENER HOLES IN SKIN WHERE NEW BUT SPLICE WAS REMOVED. VERIFY MATERIAL TO BE USED AS .063-2024T3 PO#9599151 REF AVO#ESC200513-0523-1D STEP B1H VERIFIED MATERIAL. VERIFIED MATERIAL FOR SPLICE STRAP FROM 2024 T3 .071 PO# 9047624 REF AVO# ESC200513-0523-1E STEP B. FABRICATION SPLICE STRAPS -6 AND -7. AND -7. REF AVO# ESC200513-0523-1E STEP B. FABRICATION SPLICE STRAPS -6 VERIFIED MATERIAL FOR SPLICE STRAP FROM 2024 T3 .071 PO# 9047624 VERIFIED BOTH SPLICES -6 AND-7 REF AVO ESC 200513-0523-1E STEP 17 B 1 F & G PO # 9047624. FABRICATED BUTT STRAP AND -6 AND -7 SPLICE STRAPS PER AVO ESC 200513-0523-1F STEP B.1.F, G AND I. OK TO TREAT PRIME AND INSTALL. VERIFIED BUT STRAP FAB, TREAT AND PRIME, OK TO INSTALL. INSTALLED BUTT STRAP AND SHIM UNDER BUTT STRAP WITH BMS 5-95 TO COM