Service difficulty report · Pressure Web · Boeing 73776N

Difficulty date
April 14, 2022
Submitted
May 11, 2022
Operation
Air carrier
Aircraft
N7729A
Make and model
Boeing 73776N
Aircraft serial
32675
Aircraft time
50,989 hours, 25,541 cycles
Part
Pressure Web
Condition
Cracked
Location
Wheel Well
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 FOUND AT MAIN WHEEL WELL VERTICAL PRESSURE WEB BETWEEN RBL40.00 AND RBL 45.64 IAW NDTM PART 6;51-00-00 PROCEDURE 23. CRACK LENGTH :0.843'. CRACK FOUND AT MAIN WHEEL WELL VERTICAL PRESSURE WEB BETWEEN RBL40.00 AND RBL 45.64 IAW NDTM PART 651-00-00 PROCEDURE 23. CRACK LENGTH :0.843'. / CUTTED AND REMOVED THE DAMAGE PART OF THE WEB AT THE CUT LINE AT WHEEL WELL VERTICAL PRESSURE WEB PER B737-700 SRM 57-10-0-2R-3 FIG.204;PERFORMED HFEC AT CUT OUT IAW NDTM PART 6; 51-00-00 PROCEDURE 23. NO CRACKS CLEANED REPAIR AREA AT W/W VERTICAL PERSSURE WEB RT SIDE STA 663.75 UPPER SECTION PER B737-700 SRM 57-10-10-2R-3;TO CORRECT STEP #10 - CORRECT MANUAL IS 57-10-10-2R-3TREATED AND PRIMED REPAIR AREA AS REF. B737-700 SRM 51-20-01-0G-0 AND AMM 51-21-72-370-804 STARTED DRILLING REPAIR PARTS AS REF. B737-700 SRM 51-10-01-0G-0. FABRICATED SHIM [5] PER B737-700 SRM 57-10-10-2R-3 FIG 204; MATERIAL USED 2024-T3.100' PO# 1745608. COMPLETED DRILLING REPAIR PARTS FROM KIT# 57100006-01 AND SHIM PER B737-700 SRM 51-10-02-0G-0 (CORRECTING REF. ON STEP 21). TREATED AND PRIMED REPAIR PARTS PER B737-700 SRM 51-20-01-0G-0 AND AMM 51-21-72-370-804.;OK TO INSTALL FLOOR BEAM FITTING REMOVED ON STEP #7;MIXED BMS5-95 SEALANT AT 11:45 AM 04/26/2022. SQUEEZE OUT TIME BY 7:45 PM 04/29/2022. INSTALLED REPAIR PARTS AND FLOOR BEAM FITTING PER B737-700 SRM 57-10-10-2R-3 ALTERNATIVE 2 FIG. 204 AND SRM 51-40-02-0G-0.VERIFIED INSTALLATION OF REPAIR PARTS AND FLOOR BEAM FITTING PER REF'S.

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