Service difficulty report · Rib · Boeing 7377H4

Difficulty date
May 29, 2022
Submitted
June 16, 2022
Operation
Air carrier
Aircraft
N253WN
Make and model
Boeing 7377H4
Aircraft serial
32511
Aircraft time
53,013 hours, 31,527 cycles
Part
Rib
Condition
Cracked
Location
Lh Hor 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

LH HORIZONTAL STABILIZER;#3 RIB STAB.STA 111.10 HAS CRACK AT STIFFENER 3;LOWER POSITION. / [01] CRACK CONFIRMED IAW NDTM PART 6; 51-00-00 PROCEDURE 23. CRACK LENGTH : 0.593'<BR>[NORTEC 600 ; B/C 166317 ; CALIB.DUE- 10/22];[02] REMOVED DAMAGE AT LH HORIZ. STAB RIB #3 STIFFENER #3 AS PER B737-700 SRM 51-10-02-0G-0 AND SRM 55-10-09-2R-4-REPAIR 4.;[03] VERIFIED DAMAGED (CRACK) REMOVAL OF STIFFENER # 3;[04] PERFORMED HFEC INSP. ON L/H HORIZ. STAB; #3 RIB STAB. STA 111.10 @ STIFF. #3 LWR POSITION IAW B737 NDT PART 6 51-00-00 PROC. 23. CRACK CONFIRMED IN WEB; EQUIP: NORTEC 600 B/C 166316 CAL DUE: 10/22;[05] PERFORMED ROTO INSP. ON EXISTING HOLES ON L/H HORIZ. STAB; #3 RIB STAB. STA 111.10 @ STIFF. #3 LWR POSITION IAW B737 NDT PART 6 51-00-00 PROC. 16. NO CRACKS; EQUIP: NORTEC 600 B/C 166316 CAL DUE: 10/22; B/C 160006;[06] REMOVED DAMAGE ON WEB AT LH HORIZ. STAB RIB #3 COMMON TO STIFFENER #3 AS PER B737-700 SRM 51-10-02-0G-0 AND SRM 55-10-09-2R-4-REPAIR 4. TRIM OUT 0.600' X 0.360';[11] LOCATED AND DRILLED ALL REPAIR PARTS AND RIB #3 PER REF B737-700 SRM 51-40-02-0G-0 AND SRM 55-10-09-2R-4-REPAIR 4;[17] INSTALLED ALL REPAIR PARTS PER REF B737-700 SRM SRM 55-10-09-2R-4-REPAIR 4; FIGURE 202-SHEET 1; SRM 51-40-02-0G-0 AND SRM 51-20-05-0G-0

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