Service difficulty report · Doubler · Boeing 7377CT

Difficulty date
January 28, 2023
Submitted
March 8, 2023
Operation
Air carrier
Aircraft
N567WN
Make and model
Boeing 7377CT
Aircraft serial
32747
Aircraft time
67,166 hours, 34,728 cycles
Part
Doubler
Condition
Cracked
Location
Zn 100 Fus Lower
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

EGPR INTERNAL DOUBLER CRACKED AT FWD LOWER CORNER.<[01] REMOVED PAINT BY STRIPPING AT FUSELAGE SKIN R/H SIDE EGPR AREA REF B737-700 AMM 51-21-11-150-810.; LOCATED AND DRILLED NEW EGPR INTERNAL DOUBLER REF B737-700 SRM 51-40-05-0G-0.;[07] TREATED AND PRIMED DRILLED HOLES ON NEW EGPR INTERNAL DOUBLER REF B737-700 SRM 51-20-01-0G-0.;[08] VERIFIED STEPS 6 AND 7. OK TO INSTALL NEW EGPR DOUBLER.;[09] MIXED BMS 5-95 SEALANT 22:00 2/1/23. SQUEEZE OUT TIME BY 06:00 2/5/23.;[10] INSTALLED 90% OF FASTENERS AT EGPR INTERNAL DOUBLER REF B737-700 SRM 51-40-02-0G-0 AND DWG# 146A0640.;[11] COMPLETED INSTALLATION OF EGPR INTERNAL DOUBLER REF B737-700 SRM 51-40-02-0G-0 AND DWG# 146A0640.;[12] VERIFIED STEP # 10 AND 11;[13] VERIFIED STEP #9; SQUEEZE OUT TIME 100%; ALL FASTENERS INSTALLED.;[14] CORRECTION STEP 11 : COMPLETED INSTALLATION OF EGPR INTERNAL DOUBLER REF B737-700 SRM 51-40-02-0G-0 AND DWG# 141A0640 AND 141A3702.;] APPLIED TOP COAT AT FUSELAGE SKIN ON EGPR AREA REF B737-700 AMM 51-21-73-370-803.;[18] VERIFIED DRAWINGS STEP 14-15.;[19] VERIFIED 16-17.;[20] REMOVED AND REPLACED EGPR INTERNAL DOUBLER REF B737-700 SRM 51-40-02-0G-0 AND DWG# 141A0640.;[21] FINAL 20.

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