Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
June 28, 2021
Submitted
August 11, 2021
Operation
Air carrier
Aircraft
N750SA
Make and model
Boeing 7377H4
Aircraft serial
29802
Aircraft time
75,691 hours, 44,551 cycles
Part
Stiffener
Condition
Cracked
Location
Horizontal Stab
Stage of operation
IN
How discovered
V
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; STAB STA. 129.50; 3RD VERTICAL STIFFENER IS CRACKED. ; / [01] REMOVED DAMAGE SECTION 3RD STIFFENER IAW SRM 55-10-09-2R-4 STEP 4 B(1)(2).CUTOUT DIMENSIONS: WEB L=0.600';W=0.350'; VERTICAL STIFFENER L=2.300';W=0.450; [02] VERIFIED; [03] INSPECTED DAMAGE REMOVAL; [04] HFEC CUT OUT EDGES ON RIB WEB AND VERTICAL STIFFENER AND HFEC EXISTING HOLES WITHIN THE REPAIR AREA PER SRM 55-10-09-2R-4 STEP 4.(C)(D); [05] HFEC CUT OUT EDGES ON RIB WEB AND VERTICAL STIFFENER AND HFEC EXISTING HOLES WITHIN THE REPAIR AREA PER SRM 55-10-09-2R-4 STEP 4.(C)(D); [06] ACCOMPLISHED HFEC SURFACE SCAN TO CUTOUT IAW B737 NDTM P6; 51-00-00 PROC 23. NO CRACKS NOTED. TOOL ID ATS1465; N600; [07] ACCOMPLISHED OPEN HOLE INSP. TO REMOVED FASTENER HOLES COMMON TO REPAIR IAW B737 NDTM P6; 51-00-00 PROC 16. NO CRACKS NOTED. TOOL ID ATS1465; N600; TOOL ID ATS1411; MINIMITE; [08] FABRICATED REPAIR PARTS IAW SRM 55-10-09-2R-4 STEP 4.F;THRU 4.J; REPAIR PARTS MADE FROM : T-SECTION 60-5872#7075T76511 LOT#1449876-1; ANGLE BAC1490-2793#7075T62 LOT#1435997-1; SHIMS 7075T6#0.016 LOT#1439717-1;

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