Service difficulty report · None · Boeing 7377H4

Difficulty date
September 28, 2021
Submitted
October 4, 2021
Operation
Air carrier
Aircraft
N940WN
Make and model
Boeing 7377H4
Aircraft serial
36900
Aircraft time
40,079 hours, 24,363 cycles
Part
None
Condition
Cracked
Location
L/H Horiz. Stab.
Stage of operation
UK
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

L/H STAB; #5 INSPAR RIB (STAB STA. 129.5); HAS CRACK ON THIRD VERTICAL STIFFENER APPROX. 1 INCH FROM BOTTOM OF RIB. ; / [01] REMOVED L/H STAB RIB AT (STB STA. 1295) PER SRM 55-10-09-2R-4 AND SRM 51-40-02.; [02] REMOVED DAMAGED PER SRM 55-10-09-2R-4 REPAIR 4.; [03] C/W HFEC INSPECTION OF CUT EDGES OF THE STIFFENER AND WEB IAW NDT PART 6; 51-00-00 PROC 23. NO DEFECTS FOUND.<BR><BR>C/W HFEC HOLE PROBE INSPECTION OF EXISTING FASTENER HOLES IAW NDT PART 6; 51-00-00 PROC 16. FOUND CRACK INDICATION ON 2 EA HOLES ON LOWER FLANGE. REF NRC TTG8Q006Q83P.; [04] PERFORMED GENERAL VISUAL INSPECTION OF ALL AREAS WITHIN REPAIR AREA PER SRM 55-10-09-2R-4. NO DEFECTS FOUND.; [05] REPAIR REF. CHANGE TO SRM 55-10-09-2R-5 SEE FAULT TTG8Q006Q83P.; [06] FABRICATED REPAIR PARTS PER SRM 55-10-09-2R-5 REPAIR 5. ON FAULT TTG8Q006Q83P.; [07] OK TO PRIME AND INSTALL REPAIR PARTS.; [08] INSTALLED REPAIR (WET WITH BMS 5-95 SEALANT) PER SRM 55-10-09-2R-5 REPAIR 5; [09] INSTALLED REPAIR (WET WITH BMS 5-95 SEALANT) PER SRM 55-10-09-2R-5 REPAIR 5. VERIFIED; [10] OK TO REINSTALL RIB; [11] INSTALLED RIB PER SRM 51-40-02; [12] VERIFIED RIB INSTALLATION PER SRM 51-40-02; [13] VERIFIED L/H STAB RIB REPLACEMENT AT STAB STA 129.5 PER SRM 51-40-02

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