Service difficulty report · Rib · Boeing 7377H4

Difficulty date
July 6, 2021
Submitted
August 12, 2021
Operation
Air carrier
Aircraft
N294WN
Make and model
Boeing 7377H4
Aircraft serial
32540
Aircraft time
46,361 hours, 27,729 cycles
Part
Rib
Condition
Cracked
Location
Horizontal 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

CRACK RIB LH HORIZONTAL STA. 129.50 INTERNAL THIRD RIB AFT / [01] CUT OUT DAMAGE VERTICAL STIFFENER PER SRM 55-10-09-2R-4; [02] C/W H.F.E.C. INSP OF CUTOUT PER NDT MANUAL PART 6 51-00-00 PROCEDURE 23. NO DEFECTS NOTED. C/W HOLE PROBE INSP PER NDT MANUAL PART 6 51-00-00 PROCEDURE 16. NO DEFECTS NOTED.; [03] .5 INCH CRACK AT BOTTOM OF VERTICAL RIB VERIFIED BY NDT MANUAL PART 6 51-00-00 PROCEDURE 23.; [04] CUT OUT DAMAGE VERTICAL RIB WEB PER SRM 55-10-09-2R-2; [05] VERIFIED NO CRACK AT CUTOUT AT LOWER VERTICAL STIFFENER/RIB PER NDT MANUAL PART 6 51-00-00 PROCEDURE 23.; [06] LOCATED; DRILLED AND INSTALLED NEW REPAIR PARTS PER SRM 55-10-09 REPAIR4.; [07] JUSTIN WADE (TECHNICIAN); 22-JUL-2021 18:03 UTC<BR>LOCATED; DRILLED AND INSTALLED NEW REPAIR PARTS PER SRM 55-10-09 REPAIR4..; INSP. C/W.; [08] OK TO INSTALL LH HOR STAB RIB AT STA 129.50.; [09] REINSTALLED LH HOR RIB STA 129.50 PER SRM 51-40-02.; [10] VERIFED RIB INSTALLATION; [11] OK TO INSTALL L/H HOR STAB FWD SPAR WEB.; [12] OK TO INSTALL L/H HOR STAB FWD SPAR WEB; [13] L/H HOR STAB FWD SPAR WEB CLOSED ON FAULT CARD # TTG8Q005RAYQ; [14] L/H HOR STAB L/E PANEL INSTALLED ON FAULT # TTG8Q0060W3D; [15] L/H HOR STAB RIB AT STA 129.5 REPAIRED PER SRM 55-10-09 REPAIR4. SEE ABOVE CORRECTIVE ACTIONS FOR SIGN OFFS

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