Service difficulty report · Skin · Boeing 737824

Difficulty date
September 7, 2024
Submitted
September 20, 2024
Operation
Air carrier
Aircraft
N27239
Make and model
Boeing 737824
Aircraft serial
28951
Aircraft time
76,800 hours, 28,497 cycles
Part
Skin
Part number
112A4102207
Condition
Cracked
Location
Zone 500
Stage of operation
IN
How discovered
O
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

SUSPECTED CRACK IN LH WING LOWER OUTBOARD SKIN, AT OTBD MOST FASTENER OF S-9 BETWEEN WSTA 564.5 AND WSTA 591.5. INSPECTION VERIFY CRACK IN LH WING LOWER OUTBOARD SKIN PANEL AND STRIPPED PAINT AS REQUIRED IN AREA THAT CRACK WAS FOUND. S-9 CRACK BETWEEN WSTA 564.5 AND WSTA 591.5 APPLIED SECOND COAT OF PAINT STRIPPER TO SKIN WHERE CRACK WAS APPLIED THE 3RD COAT OF PAINT STRIPPER ON THE SKIN WHERE THE INDICATED. MCO TIME 0900 SUSPECTED CRACK IS LOCATED AT 4:00 PM 9/10/24. VERIFIED CRACK WITH HIFC PART 6, 51-00-00 PRCOEDURE 23. IN LH WING LOWER OUTBOARD SKIN PANEL AND S-9 CRACK BETWEEN WSTA 564.5 AND WSTA 591.5 CRACK FOUND TO BE 1.7 IN LONG. REMOVED REMAINDER OF PAINT STRIPPER, CLEANED, AND REQUESTING INSPECTION TO VERIFY CRACK VERIFIED REMOVAL OF REMAINING FASTENERS AT FRONT SPAR PER AVO # 239-24-09-08-01 STEP A.2. REMOVED FASTENER ON STR 8 AND 9. AND PARTIAL FRONT SPAR PER AVO VERIFIED REMOVED FASTENER ON STR 8 AND 9. AND PARTIAL FRONT SPAR REMOVED REMAINING FASTENERS AT FRONT SPAR PER AVO # REMOVED REMAINING FASTENERS AT FRONT SPAR PER AVO # # 239-24-09-08-01. PER AVO # 239-24-09-08-01. 239-24-09-08-01. 239-24-09-08-01. PO# 14497302330, ORIGINAL THICKNESS 0.160 MILLED DOWN TO 0.130 FOR FILLER CORRECTION. VERFIED: PERFORMED TRIM OUT OF DAMAGED PORTION OF SKIN. PER AVO: ACOMPLISHED HFEC INSPECTION OF TRIMMED EDGES PER 737 NDT MANUAL VEREFIED PERFORMED AN INSURANCE CUT AROUND EDGE OF THE TRIM-OUT. VEREFIED HFEC SURFACE INSPECTION PER 737NDT MANUAL PART 6, PERFORMED HFEC PART 6,5