Service difficulty report · Skin · Boeing 73776N

Difficulty date
July 12, 2021
Submitted
August 10, 2021
Operation
Air carrier
Aircraft
N7723E
Make and model
Boeing 73776N
Aircraft serial
32670
Aircraft time
48,099 hours, 24,239 cycles
Part
Skin
Condition
Cracked
Location
Rt Wing 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

CRACK IN #5 SLAT LOWER SKIN NEAR ACTUATOR FITTING ATTACH FASTENER ; / [01] HFEC INSPECTED CRACK ON #5 SLAT LOWER SKIN IAW 737 NDTM PART 6 51-00-00 PROCEDURE 23; AREA MARKED. EQUIP ID#: IS000450 S/N: N500D000M120071; [02] REMOVED HI LOCK AT #5 SLAT LOWER SKIN NEAR ACTUATOR FITTING ATTACH AND OVERSIZE HOLE TO 0.215 IAW SRM 51-40-02.; [03] HFEC REQUEST ON OPEN HOLE; SLAT LOWER SKIN AND ACTUATOR FITTING FOR FREE CRACK CONDITION.; [04] ET INSPECTED HOLE IAW 737 NDTM PART 6 51-00-00 PROCEDURE 16; CRACK STILL NOTED IN SKIN.18] FABRICATED REPAIR PARTS: DOUBLER; MADE FROM CLAD 7075-T6 #0.071' LOT#1459410-1 AND FILLER MADE FROM CLAD 7075-T6 0.063'; LOT#1418646-2. APPLIED CHEMICAL CONVERSION COATING. IAW SRM 51-20-01-0G-0 AND SRM 57-42-01-2R-8 STEP 4E THRU 4J. OK TO PRIMER.; [19] VERIFIED FABRICATION OF REPAIR PARTS: DOUBLER & FILLER FROM CLAD 7075-T6 0.071' LOT# 1459410-1 AND FROM CLAD 7075-T6 0.063' LOT# 1418646-2. VERIFIED APPLICATION OF CHEMICAL CONVERSION COATING. ALL IAW SRM 51-20-01-0G-0 & SRM 57-42-01-2R-8 STEP 4. E.-4. J.<BR>OK TO APPLY PRIMER GIVEN.;

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