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

LEFT HAND HORIZONTAL STABILIZER INSPAR RIB; STAB STA. 120.30; 3RD VERTICAL STIFFENER IS CRACKED. ; / [01] VERIFIED APPLICABILITY FOR SRM 55-10-09-2R-5; [02] REMOVED DAMAGE FROM L/H HORIZONTAL STABILIZER INSPAR RIB STA120.3 3RD VERTICAL STIFFENER; WEB AND FLANGE IAW SRM 55-10-09-2R-5 STEP 4.B.3. AND FIG 204; [03] VERIFIED APPLICABILITY OF SRM AND REMOVAL OF DAMAGE PER SRM 55-10-09-2R-5; [04] HFEC INSPECTED TRIMMED EDGES OF CUTOUTS IN LOWER CHORD FLANGE; STIFFENER AND WEB PER 737NDT PART 6 51-00-00 PROCEDURE 23. NO CRACKS FOUND. CAL ID IS000450 S/N N500D000M120071; [05] HFEC ROTARY INSPECTED ALL OPEN HOLES IN REPAIR AREA PER 737NDT PART 6 51-00-00 PROCEDURE 16. NO CRACKS FOUND. CAL ID IS000450 S/N N500D000M120071.; [06] PRIER TO REPAIR FOUND L/H HORZ. STAB. RIB AT STAB STA. 120.30 3RD VERTICAL STIFFENER TO BE OUT OF LIMITS PER SRM 55-10-09-1A-1 STEP 4 A-1; [07] PERFORMED A GVI OF ALL AREAS IN REPAIR AREA FOR CORROSION ;EXISTING REPAIRS OR ANY OTHER DEFECTS; NO DEFECTS NOTED PER SRM 55-10-09-2R-5 STEP STEP 4-F; [08] ACCOMPLISHED GVI; NO DEFECTS; [09] FABRICATED REPAIR PARTS 1EA T-SECTION P/N 7075-T6511 AMS-QQ-A-200/15 LOT # 146316-1; 1 EA ANGLE P/N BAC1490 7075-T6 AMS-QQ-A-200/11 LOT # 1461745-1; 1 EA FILLER WITH 7075-T6 #0.050' LOT # 5087747-1 AND 2 EA SHIMS WITH 7075T6 #0.012' LOT # 1086450 IAW SRM 55-10-09-2R-5 PAR 4.G. FIG 204 TABLE 201

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