Service difficulty report · Skin · Boeing 737824

Difficulty date
May 25, 2021
Submitted
May 26, 2021
Operation
Air carrier
Aircraft
N76523
Make and model
Boeing 737824
Aircraft serial
37101
Aircraft time
34,535 hours, 12,003 cycles
Part
Skin
Part number
146A3231
Condition
Damaged
Location
Bs 857-927
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

REFERENCE 6258300. AIRCRAFT SUSTAINED FUSELAGE BELLY SKIN DAMAGE FROM STA.857 TO 927, FROM S-27L TO S-27R. REMOVED FASTENERS PER AVO ESC200513-0523-1 STEP A.1. NEED TO PERFORM DETAILED VISUAL INSPECTIONS PER AVO ESC200513-0523-1 STEPS A.2 THRU A.4. ESC200513-0523-1 STEP A.5. REMOVED SHEAR TIES AT STA.867, 887 AND 907, PER AVO TRIMMED OUT DAMAGED SKIN PER AVO ESC200513-0523-1 STEP 6.A. THRU D. ACCOMPLISHED DETAIL VISUAL INSPECTIONS IN ACCORDANCE WITH AVO 2000513-0523-1 STEPS A.2 THRU 5. ALL DEFECTS NOTED ON LOG ITEMS. COMPLETED HFEC AT TRIM CUTOUT. NO CRACKS FOUND. REF: AVO ESC200513-0523-1. STEP A(7). FOUND. REF: AVO ESC200513-0523-1. STEP A(10). PERFORMED HFEC SURFACE INSPECTION AT BENDOUT AREAS. NO CRACKS PERFORMED HFEC HOLE PROBE AND COUNTER SINK INSPECTION. NO CRACKS FOUND. REF: AVO ESC200513-0523-1. STEP A(12) & (13). ESC200513-0523-1A PARA A STEP 11 ACCOMPLISHED ULTASONIC THICKNESS CHECK ON SKIN PER AVO ACCOMPLISHED ULTASONIC THICKNESS CHECK ON SKIN PER AVO ESC200513-0523-1A PARA A STEP 11. MAPPED. OUT AND PROVIDED VALUES TO ENGINEERING PEREFORMED HFEC OF TRIMED REA PER AVO ESC200513-0523-1A PARA A STEP 15 NO CRACKS NOTED AT THIS TIME CUT BUTT STRAP PER AVO ECS200513-0523-1A PARA A STEP 14 AND ACP HFEC IAW NTM 51-00-00 PART 6 NO DEFECTS NOTED INCLUDING DAMAGE REMOVAL STRINGER CLIP HOLES IAW 737 NDT PART 6 51-00-00 PROCEDURE 16, NO CRACKS FOUND. STEP 16 AND 17 OF AVO ESC200513-0523-1A COMPLETE. ACCOMPLISHED HFEC HOLE PROBE AT SHEAR TIE ATTACH FASTENERS AND BLENDED