Service difficulty report · None · Boeing 737

Difficulty date
February 24, 2022
Submitted
March 28, 2022
Operation
Air carrier
Aircraft
N238WN
Make and model
Boeing 737
Aircraft serial
34713
Aircraft time
53,117 hours, 31,534 cycles
Part
None
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

CRACKED 3RD VERTICAL STIFFENER ON RIGHT HAND HORIZONTAL STABILIZER INSPAR RIB AT STATION 120.30. / [01] REMOVED DAMAGE PART AT RH HORIZONTAL STABILIZER STA 120.30 RIB 3RD VERTICAL STIFFENER IAW SRM 55-10-09-2R-4;[02] HFEC REQUEST ON THE CUT OUT EDGES; WEB AND EXISTING FASTENERS HOLES WITHIN THE REPAIR AREA TO ENSURE NO CRACKS EXIST.;[03] VERIFIED CORRECTIVE ACTION ENTRY 1.;[04] ACCOMPLISHED HFEC INSPECTION OF CUTOUT EDGES AND EXISTING FASTENER HOLES NO CRACK NOTED IAW 737 NDTM PART 6; 51-00-00 PROCEDURE 23 AND 16 TOOL# ATS2353; MINIMITE ATS2407;[05] FABRICATED REPAIR PARTS (1) T-SECTION FROM 60-5872 7075 T76511 LOT# 1449876-1 (2) ANGLE FROM BAC 1490-2793 7075 T62 CLAD LOT# 1442205-1 (3) SHIM FROM 7075 T6 0.020' CLAD LOT# 1381332-1; APPLIED CHEMICAL CONVERSION COATING IAW SRM 55-10-09-2R-4 OK TO PRIME.;[06] VERIFIED CORRECTIVE ACTION ENTRY 5.<BR><BR>OK TO PRIME REPAIR PARTS;[07] SRM 55-10-09-2R-4 IS APPLICABLE.;[08] PRIMED REPAIR PARTS AND COMMON AREA IAW SRM 55-10-09-2R-4 OK TO INSTALL.;[09] VERIFIED CORRECTIVE ACTION ENTRIES 7. AND 8. <BR><BR>OK TO INSTALL REPAIR PARTS;[10] INSTALLED REPAIR PARTS; AT RH HORIZONTAL STABILIZER STA 120.30 RIB 3RD VERTICAL STIFFENER IAW SRM 55-10-09-2R-4;[11] VERIFIED CORRECTIVE ACTION ENTRY 10.