Service difficulty report · Rib · Boeing 7377H4

Difficulty date
August 5, 2021
Submitted
September 10, 2021
Operation
Air carrier
Aircraft
N754SW
Make and model
Boeing 7377H4
Aircraft serial
29849
Aircraft time
74,935 hours, 44,224 cycles
Part
Rib
Condition
Cracked
Location
Vertical 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 DORSAL FIN RIB FWD POSITION AT VERTICAL STABILIZER ; 2021-368570 / [01] REMOVED RIB LOC. DORSAL FIN FWD POSITION AT VERTICAL STABILIZER IAW B737-700 SRM 51-40-02 DUE TO NOT FOUND ALLOWED DAMAGE ON SRM ; RIB MUST BE REPLACED CRACK LENGTH IS : 0.625 TOOL USED : CALIPER P/N: DIGITAL 150 S/N: AE-412007 DUE DATE : 21-JUN-22 AND PERFORMED VISUAL INPECTION ON AREA AND NOT FOUND ADDITIONAL DAMAGE; [02] REMOVED BRACKET (2E/A) AND FILLER (2E/A) LOC. ON RIB DORSAL FIN FWD POSITION AT VERTICAL STABILIZER IAW B737-700 SRM 51-40-02 AND PERFORMED VISUAL INPECTION AND NOT FOUND ADDITIONAL DAMAGE; [04] STEPS 2 AND 3 COMPLETED.; [05] OK TO INSTALL RIB; BRACKET (2E/A); FILLER (2E/A) AND FASTENERS LOC. DORSAL FIN FWD POSITION AT VERTICAL STABILIZER; [06] STEP 5 COMPLETED; [07] STEP 5 COMPLETED RII ITEM; [08] INSTALLED RIB; BRACKET (2E/A); FILLER (2E/A) AND FASTENERS LOC. DORSAL FIN FWD POSITION AT VERTICAL STABILIZER IAW B737-700 SRM 51-40-02 AND DWG 174A0103 REV A. AND DWG 174A1008 REV -; [09] REPLACED DORSAL FIN RIB FWD POSITION AT VERTICAL STABILIZER IAW B737-700 SRM 51-10-02 ITEM 9; 51-40-02 AND DWG 174A0103 REV A; DWG 174A1008 REV -; [10] STEP 8 COMPLETED <BR>RII; [11] TASK CARD COMPLETED<BR>RII

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