Service difficulty report · Skin · Boeing 7377H4

Difficulty date
August 17, 2022
Submitted
September 29, 2022
Operation
Air carrier
Aircraft
N431WN
Make and model
Boeing 7377H4
Aircraft serial
29845
Aircraft time
66,939 hours, 39,408 cycles
Part
Skin
Condition
Cracked
Location
Lt Nr 1 Slat
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

SUSPECT CRACK AT #1 SLAT LWR LEADING SKIN AT FASTENER HOLE FOR SLAT ACTUATOR ATTACH FITTING SLAT STATION 95.19. 8-1 / [01] REMOVED FASTENER AT L/WING OF #1 SLAT LOWER LEADING SKIN FOR SLAT ACTUATOR ATTACH FITTING STA 95.19 IN IAW SRM 51-40-02-0G-017] FABRICATED REPAIR PARTS ONE DOUBLER AND FILLER AT #1 SLAT LOWER LEADING SKIN DIMENSION 19'X 5' AND 5'X 3' AS SHOW IN FIG 202/ REPAIR 8 FOR ALTERNATIVE 1 SHEET 1 REFER TO TABLE 203/ FOR THE REPAIR MATERIAL IN IAW SRM 57-42-01-2R-8;[18] LOCATED AND DRILLED REPAIR PARTS IN IAW SRM 51-40-05-0G-0;[19] VERIFIED STEPS 17 THRU. 18<BR>OK TO TREAT AND PRIME REPAIR PARTS.;[20] TREATED REPAIR PARTS WITH ALODINE AND PRIMER IN IAW SRM 51-20-01-0G-0 AND 51-21-72-370-804;[21] VERIFIED STEP 20<BR>OK TO INSTALL REPAIR PARTS.;[22] INSTALLED COUNTERSINK REPAIR WASHERS FOR THE INITIAL FASTENER LOCATION IN IAW SRM 51-40-08-0G-0;[23] MIXED BMS 5-95 SEALANT AT 14:00 PM 8/26/22; SQUEEZE OUT TIME BY 22:00 PM 8/29/22;[24] PARTIALLY: INSTALLED REPAIR DOUBLER AND FILLER AT #1 SLAT LOWER LEADING SKIN IN IAW SRM 57-42-01-2R-8/ REPAIR 8 FIG 202/ REPAIR 8 ALTERNATIVE 1 SHEET 1;[25] ACCOMPLISHED INSTALLATION OF REPAIR DOUBLER AND FILLER AT #1 SLAT LOWER LEADING EDGE SKIN AS PER SRM 57-42-01-2R-8 AND SRM 51-40-02-0G-0.;[31] (FINAL) FABRICATED; LOCATED/DRILLED; AND INSTALLED REPAIR PARTS AT #1 SLAT LWR LEADING EDGE SKIN AS PER SRM 57-42-01-2R-8; SRM 51-40-02-0G-0; AND SRM 51-40-05-0G-0.;[32] VERIFIED AND INSPECTED STEP# 30.;[33] VERIFIED. FINAL.

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