Service difficulty report · Doubler · Boeing 7377H4

Difficulty date
April 4, 2022
Submitted
May 2, 2022
Operation
Air carrier
Aircraft
N245WN
Make and model
Boeing 7377H4
Aircraft serial
32506
Aircraft time
53,466 hours, 31,928 cycles
Part
Doubler
Condition
Cracked
Location
L/H Horiz. Stab.
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 LH HORIZONTAL STABILIZER LOWER SKIN STAB STA 193.90 ; 16.5' FROM FRONT SPAR ;I/B ROW. CRACK LENGTH : 0.281' CRACK FOUND AT LH HORIONTAL STABILIER LOWER SKIN STAB STA 193.90 16.5' FROM FRONT SPAR I/B ROW. CRACK LENGTH : 0.281' / [01] REMOVED WEB PANEL 331BZ FOR ACCESS REF B737-700 SRM 51-40-02-0G-0[10] OK TO FABRICATE REPAIR PARTS AND LOCATE AND DRILL HOLES.;[11] FABRICATED REPAIR DOUBLER FROM 0.080' 2024-T3 CLAD SHEET AND FILLER FROM 0.063' 2024-T3 CLAD SHEET IAW B737-700 SRM 55-10-01-2R-11 AND LOCATED & DRILLED REPAIR PARTS AND REPAIR AREA IAW B737-700 SRM 51-40-02-0G-0;[20] INSTALLED REPAIR PARTS AT LH HORIZONTAL STABILIZER LOWER SKIN STAB STA 193.90 IAW B737-700 SRM 55-10-01-2R-11 REPAIR 11; FIGURE 204;[23] INSTALLED WEB PANEL 331BZ IAW B737-700 SRM 51-40-02-0G-0;FABRICATED REPAIR DOUBLER FROM 0.080' 2024-T3 CLAD SHEET AND FILLER FROM 0.063' 2024-T3 CLAD SHEET IAW B737-700 SRM 55-10-01-2R-11 AND LOCATED & DRILLED REPAIR PARTS AND REPAIR AREA IAW B737-700 SRM 51-40-02-0G-0. TREATED AND PRIMED REPAIR PARTS AND REPAIR AREA IAW SOPM 20-43-03 AND SOPM 20-44-04. INSTALLED REPAIR PARTS AT LH HORIZONTAL STABILIZER LOWER SKIN STAB STA 193.90 IAW B737-700 SRM 55-10-01-2R-11 REPAIR 11; FIGURE 204. APPLIED TOP COAT REPAIR DOUBLER AT LH HORIZONTAL STABILIZER LOWER SKIN IAW B737-700 AMM 51-21-00;

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