Service difficulty report · Rib · Boeing 737*

Difficulty date
February 7, 2022
Submitted
March 8, 2022
Operation
Air carrier
Aircraft
N7873A
Make and model
Boeing 737*
Aircraft serial
29350
Aircraft time
48,860 hours, 26,568 cycles
Part
Rib
Condition
Cracked
Location
Rh Hor Stab
Stage of operation
UK
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

RIGHT HAND HORIZONTAL STABILIZER INSPAR RIB; STATION 120.30; 2ND VERTICAL STIFFENER IS CRACKED. / [01] REMOVED THE DAMAGED PART AT RH HORIZONTAL STABILIZER STA 120.30 RIB 2ND VERTICAL STIFFENER CUT OUT DIMENSIONS 0.6' X 0.325' IAW SRM 55-10-09-2R-4;[02] VERIFIED CORRECTIVE ACTION 1;[03] HFEC REQUEST ON THE CUT OUT EDGES; WEB AND EXISTING FASTENERS HOLES WITHIN THE REPAIR AREA TO ENSURE NO CRACKS EXIST.;[04] HFEC INSPECTED CUT EDGE IAW 737 NDTM PART 6 51-00-00 PROCEDURE 23; NO CRACKS NOTED. EQUIP USED: NORTEC 600 ID: ATS1465;[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] SRM 55-10-09-2R-4 IS APPLICABLE.;[07] VERIFIED CORRECTIVE ACTION 5 AND 6;[08] PRIMED REPAIR PARTS AND COMMON AREA IAW SRM 55-10-09-2R-4 OK TO INSTALL.;[09] VERIFIED CORRECTIVE ACTION 8;[10] INSTALLED REPAIR PARTS AT R/H HORIZONTAL STAB. INSPAR RIB STAB STA 120.3 2ND VERTICAL STIFFENER IAW SRM 55-10-09-2R-4;[11] VERIFIED CORRECTIVE ACTION 10;[12] VERIFIED JOB COMPLETE;[13] VERIFIED NDI JOB COMPLETE;[14] VERIFIED RII JOB COMPLETE