Service difficulty report · Rib · Boeing 737*

Difficulty date
September 29, 2021
Submitted
November 15, 2021
Operation
Air carrier
Aircraft
N788SA
Make and model
Boeing 737*
Aircraft serial
30603
Aircraft time
68,361 hours, 40,407 cycles
Part
Rib
Condition
Cracked
Location
Rl/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

RIGHT HAND HORIZONTAL STABILIZER INSPAR RIB; 92.7; 3RD VERTICAL STIFFENER IS CRACKED. ; / [01] REMOVED THE DAMAGED PART OF THE RIB AT R/H HORIZ. STAB. 92.7 3RD VERTICAL IAW SRM 55-10-09-2R-4; [02] VERIFIED DAMAGE REMOVAL: REMOVED THE DAMAGED PART OF THE RIB AT R/H HORIZ. STAB. 92.7 3RD VERTICAL IAW SRM 55-10-09-2R-4; [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 CUTOUT AREA OF RIB IAW B737 NDTM P6; 51-00-00 PROC 23. NO CRACKS NOTED. TOOL ID ATS1465; N600; [05] HFEC INSPECTED OPEN HOLES COMMON TO REPAIR AREA IAW B737 NDTM P6; 51-00-00 PROC 16. NO CRACKS NOTED. TOOL ID ATS1465; N600; TOOL ID ATS1411; MINIMITE; [06] 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.; [07] VERIFIED CORRECTIVE ACTION STEP 6.VERIFIED OK TO TREAT AND PRIME.; [08] PRIMED REPAIR PARTS AND COMMON AREA IAW SRM 55-10-09-2R-4 OK TO INSTALL.; [09] VERIFIED CORRECTIVE ACTION 8; OK TO INSTALL; [10] INSTALLED REPAIR PARTS AT RH HORIZONTAL STABILIZER INSPAR RIB STAB STA 92.7 3RD VERTICAL STIFFENER IAW SRM 55-10-09-2R-4; [11] VERIFIED CORRECTIVE ACTION 10.