Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
May 13, 2021
Submitted
May 17, 2021
Operation
Air carrier
Aircraft
N220WN
Make and model
Boeing 7377H4
Aircraft serial
32491
Aircraft time
52,961 hours, 31,490 cycles
Part
Stiffener
Condition
Cracked
Location
Horizontal Stab
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

RIGHT HORIZONTAL STABILIZER; RIB STA 92.7; RIB STIFFENER #1 CRACKED ABOVE LOWER FLANGE. CUT OUT DAMAGE AREA ON #1 STIFFENER STA.92.70 HORIZONTAL STAB RIB IAW SRM 55-10-09-2R-4 REPAIR4 VERIFIED MATERIAL ID FOR REPAIR PARTS 55100003-01 TAG #WN 4752 IAW DWG 55100003 REV B VERIFIED DAMAGE REMOVAL PER SRM 55-10-09-2R-4 AND VERIFIED MATERIAL FOR REPAIR PARTS ITEMS 1 AND 2 VERIFIED ITEMS 1; 2; AND 3 HFEC CUTOUT IAW B737 NDT PART 6; 51-00-00 PROC23.REMOVED DAMAGE AND REPAIRED RH HORIZONTAL STAB STA 92.7 RIB AT #1 STIFFENER IAW SRM 55-10-09-2R-4.

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