Service difficulty report · Skin · Boeing 7377H4

Difficulty date
May 27, 2022
Submitted
July 13, 2022
Operation
Air carrier
Aircraft
N949WN
Make and model
Boeing 7377H4
Aircraft serial
36663
Aircraft time
38,976 hours, 23,480 cycles
Part
Skin
Condition
Cracked
Location
L/H Horiz. 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 FOUND ON LT HAND HORIZONTAL STABILIZER LOWER SKIN AT STAB STA 193.90 ; 16.5' FROM FRONT SPAR ; I/B ROW.CRACK LENGTH : 1.25' CRACK FOUND ON LT HAND HORIONTAL STABILIER LOWER SKIN AT STAB STA 193.90 16.5' FROM FRONT SPAR I/B ROW.CRACK LENGTH : 1.25' / [01] FABRICATED LAY OUT I.A.W. B737-700 SRM 55-10-01-2R-11.;24] INSTALLED L/H HORIZONTAL STAB. LOWER IN SPAR SKIN EXTERNAL REPAIR PER REF. SRM 55-10-01-2R-11 REP 11; REPAIR11 IS A CATEGORY B REPAIR; WITH INSPECTION THRESHOLD AT 56;000 TOTAL FLIGHT CYCLES;[25] VERIFIED SQUEEZE OUT AND 100% FASTENERS INSTALLATION ON LOWER SKIN REPAIR AT 7:30 ON 06/11/2022; PER REF. SOPM 20-50-19;[26] CORRECTION STEP23 MIXED SEALANT 0870CO80BM654SKN40 AT 17:00 ; ON 06/11/2022; SQUEEZE OUT AND FASTENER INSTALLATION VERIFICATION DUE BY 06/14/2022 AT 5:00; PER SOPM 20-50-19;[27] CORRECTION STEP 25 VERIFIED SQUEEZE OUT AND 100% FASTENERS INSTALLATION ON LOWER SKIN REPAIR AT 19:30 ON 06/11/2022; PER REF. SOPM 20-50-19;[28] VERIFIED STEP 26. AND 27.;[29] INSTALLED L/H HORIZONTAL STAB. LOWER IN SPAR SKIN EXTERNAL REPAIR PER REF. SRM 55-10-01-2R-11 REP 11; REPAIR11 IS A CATEGORY B REPAIR; WITH INSPECTION THRESHOLD AT 56;000 TOTAL FLIGHT CYCLES;[30] VERIFIED STEP 29. REPAIR 11 IS A CATEGORY B REPAIR; WITH INSPECTION THRESHOLD AT 56;000 TOTAL FLIGHT CYCLES.

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