Service difficulty report · Doubler · Boeing 737

Difficulty date
March 26, 2022
Submitted
May 2, 2022
Operation
Air carrier
Aircraft
N475WN
Make and model
Boeing 737
Aircraft serial
32474
Aircraft time
59,744 hours, 35,276 cycles
Part
Doubler
Condition
Cracked
Location
L/H Wing
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

#3 SLAT NOSE SKIN IS CRACKED AT ACTUATOR ATTACH RIB AT FASTENER. MARKED / [01] REMOVED SLAT COVE PANELS 523CB; 523DB; 523EB IAW SOPM 20-50-01.;[02] REMOVED SLAT FLEX SKIN IAW SRM 57-4201 2R-8.;[03] VALIDATED APPLICABILITY OF SRM 57-42-01-2R-8.;[04] REMOVED FASTENERS AS REQUIRED AND CUT OUT DAMAGED AREA OF SLAT NOSE SKIN IAW SRM 57-42-01-2R-8 PARA.4.;[05] VERIFIED CORRECTIVE ACTIONS 3 AND 4;[06] ACCOMPLISHED HFEC INSPECTION IAW NDTM D6-37239 PART 6; 51-00-00 PROC 16. SRM 51-42-01-2R-8 REPAIR 8 STEP 4.C. NO DAMAGE FOUND. TOOL I.D. IS000450 500D; ATS2407 MINIMITE;[07] FABRICATED REAIR DOUBLER FROM 7075-T62 CLAD; .071'; LOT# 1478276-1. REPAIR FILLER FROM 7075-T62 CLAD; .063'; LOT# 1418646-2. APPLIED CHEMICAL CONVERSION COATING TO REPAIR PARTS AND BARE AREAS OF SLAT NOSE SKIN. INSTALLED COUNTER SINK REAIR WASHERS TO SLAT NOSE SKIN AS REQUIRED. WORK DONE IAW SRM 57-42-012R-8 PARA. 4. F.