Service difficulty report · Skin · Boeing 7377H4

Difficulty date
January 18, 2022
Submitted
February 14, 2022
Operation
Air carrier
Aircraft
N453WN
Make and model
Boeing 7377H4
Aircraft serial
29847
Aircraft time
58,760 hours, 34,591 cycles
Part
Skin
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 INDICATION FOUND ON LH HORIZONTAL STABILIZER LOWER IN-SPAR SKIN AT STATION 193.90 RIB; 16.500 INCH FROM FRON SPAR; INBD SIDE OF RIB. CRACK LENGTH IS 0.600 INCH ; 2022-11537 / [01] TOOL USED P/N:NORTEC 600D; S/N:210138003; DUE DATE: 05-MAR-22.; [02] TOOL USED EDDY CURRENT FLAW DETECTOR P/N:NORTEC 600D; S/N:210138003; DUE DATE: 05-MAR-22; [03] TOOL USED ULTRASONIC THICKNESS GAGE P/N: 45MG; S/N:130064101; DUE DATE: 11-MAR-22.; [04] REPAIRED LOWER INSPAR SKIN AT STATION 193.90 RIB; 16.500 INCH FROM FRON SPAR; INBD SIDE OF RIB LT HORIZONTAL STABILIZER IAW SMR B737-700 55-10-01-2R-11 REPAIR 11; SEE INDIVIDUAL SIGNOFFS BELOW.; [05] CORRECTED STEP 4.<BR>REPAIRED LOWER INSPAR SKIN AT STATION 193.90 RIB; 16.500 INCH FROM FRONT SPAR; INBD SIDE OF RIB LT HORIZONTAL STABILIZER IAW SRM B737-700 55-10-01-2R-11 REPAIR 11; SEE INDIVIDUAL SIGNOFFS BELOW.; [06] CERTIFIED RII MAJOR REPAIR PERFORMED. <BR>SEE INDIVIDUAL SIGNOFFS BELOW.

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