Service difficulty report · Doubler · Boeing 737

Difficulty date
April 4, 2022
Submitted
April 26, 2022
Operation
Air carrier
Aircraft
N923WN
Make and model
Boeing 737
Aircraft serial
36627
Aircraft time
46,206 hours, 27,873 cycles
Part
Doubler
Condition
Cracked
Location
R/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 RH HORIZONTAL STABILIZER LOWER SKIN AT STAB STA 193.90 ; 9.25' FROM REAR SPAR ;I/B ROW.CRACK LENGTH': 0.750' CRACK FOUND AT RH HORIONTAL STABILIER LOWER SKIN AT STAB STA 193.90 9.25' FROM REAR SPAR I/B ROW.CRACK LENGTH': 0.750' / [01] REMOVED FRONT SPAR REMOVABLE WEB 341BZ AS PER B737-700 SRM 51-40-02-0G-0;[11] FABRICATED AND TRIMMED REPAIR DOUBLER AND FILLER AS PER B737-700 SRM 55-10-01-2R-11. TABLE. 201. FIG. 204. DET. B. AND SRM 51-10-01-0G-0.[16] INSTALLED DOUBLER AND FILLER AS PER B737-700 SRM 55-10-01-2R-11. FIG. 204. DET. B. AND SRM 51-40-02-0G-0;[23] TRIMMED OUT DAMAGED AREA AT RH HORIZONTAL STABILIZER LOWER SKIN STAB STA 193.90; 9.25' FROM REAR SPAR AS PER B737-700 SRM 55-10-01-2R-11. FIG. 204. DET. B; PERFORMED HFEC INSP ON CUTOUT AREA; ROTO AND COUNTERSINK INSP ON EXISTING HOLES IAW B737 NDT P6 51-00-00 PROC.23; NDT P6 51-00-00 PROC.16 & NDT P6 51-00-00 PROC.16; NO CRACKS; LOCATED; DRILLED AND COUNTERSINKED REPAIR PARTS AS PER B737-700 SRM 55-10-01-2R-11. FIG. 204. DET. B. AND SRM 51-40-05-0G-0 AND SRM 51-40-08-0G-0; TREATED AND PRIMED REWORKED AREAS AND REPAIR PARTS AS PER B737-700 AMM 51-21-41-370-803 AND AMM 51-21-72-370-803; INSTALLED DOUBLER AND FILLER AS PER B737-700 SRM 55-10-01-2R-11. FIG. 204. DET. B. AND SRM 51-40-02-0G-0.;[24] (LATE ENTRY)MATERIAL USED ;REPAIR DOUBLER 2024T-3 SHEET; 0.080' ; P.O1764783 AND REPAIR FILLER 2024-T3 SHEET; 0.063';P.O 1735552.;