Service difficulty report · Rib · Boeing 7377H4

Difficulty date
August 24, 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
Horizontal 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 LEADING EDGE SKIN ACCESS PANEL 341B AT STA 95.96 AT RT HORIZONTAL STABILIZER (1 EA) ; 2021-368797 / [01] TOOK MEASURES OF CRACK RIB LEADING EDGE SKIN ACCESS PANEL 241B AT STA 95.96 RT HORIZONTAL STABILIZER MEASURES ARE: L:0.245 TOOL USED IS CALIPER P/N: 500-197-30 ; S/N: 15242824 DUE DATE: 17-JUN-22.; [02] REMOVED RIB LEADING EDGE SKIN ACCESS PANEL 341B AT STA 95.96 AT RT HORIZONTAL STABILIZER (1 EA) AND PERFORMED VISUAL INSPECTION AREA AND NOT FOUND MORE DAMAGE.; [03] COMPLETED STEP 1 AND 2; [04] EXACTLY LOCATION OF CRACK IS ON RIB STA 95.96 AT LEADING EDGE ACCESS PANEL 341B AT RT HORIZONTAL STABILIZER; [05] STEP 4 COMPLETED.; [06] PERFORMED DRILL ON NEW RIB STA 95.96 AT LEADING EDGE ACCESS PANEL 341B AT RT HORIZONTAL STABILIZER AND APPLIED PROTECTIVE TREATMENT ON HOLES IAW B737-700 SRM 51-40-05 AND SRM 51-20-01; [07] OK TO INSTALL NEW RIB AND FASTENER ON STA 95.96 AT LEADING EDGE ACCESS PANEL 341B AT RT HORIZONTAL STABILIZER GRANTED; [08] STEP 6 AND 7 COMPLETED; RII.<BR><BR>OK TO INSTALL GRANTED.; [09] INSTALLED NEW RIB AND FASTENER ON STA 95.96 AT LEADING EDGE ACCESS PANEL 341B AT RT HORIZONTAL STABILIZER IAW B737-700 SRM 51-40-02 ;SRM 51-10-02 ITEM 9 AND DWG 186A1001 REV: A; [10] STEP 9 COMPLETED RII; [11] REPLACED RIB ON STA 95.96 AT LEADING EDGE ACCESS PANEL 341B AT RT HORIZONTAL STABILIZER IAW B737-700 SRM 51-40-02 ;SRM 51-10-02 ITEM 9 AND DWG 186A1001 REV: A P/N USED 186A1352-6 PO 2021 184921 1; [12] JOB COMPLETED AS RII.

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