Service difficulty report · Skin · Boeing 737824

Difficulty date
July 11, 2026
Submitted
July 14, 2026
Operation
Air carrier
Aircraft
N78501
Make and model
Boeing 737824
Aircraft serial
31602
Aircraft time
60,418 hours, 23,095 cycles
Part
Skin
Condition
Damaged
Location
Zone 100
Stage of operation
IN
How discovered
V
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

LIGHTNING STRIKE DAMAGE LOCATED AT STATION 214 AND 7" BELOW FLOOR LINE STRINGER 17R. DAMAGE IS AWAY FROM FASTENER.BLENDED AREA REMOVED .017" OF MATERIAL ORIGINAL THICKNESS IS .040". BLEND IS OUT OF LIMITS. A REPAIR IS NEEDED FOR THIS AREA. REQUESTING A THICKNESS CHECK OF REMAINING MATERIAL. PERFORMED ULTRASOUND THICNESS TEST REF B737 NDT PT 4 51-00-00 PROC 2. ORIGINAL DAMAGE DIA WAS .037" PIN POINT REF PUTTING THIS OUT OF LIMITS IS 51-00-01 HFEC FOUND DAMAGE TO GO ALL THE WAY THROUGH THE SKIN. BLEND AREA MEASURES 1.25" X 1.25". BLENED AREA FAILED HFEC INSPECTION. CRACK INDICATION SHOWN. REF 737 NTM PT.6. 51-00-00 PROCEDURE 23. AND SRM 53-00-01-2R-38. TEST ACCOMPLISHED STEP 1 OF AVO ESC0501-09JUL2026-01 REQUESTING INSPECTION FOR GRID THICKNESS CHECK PER STEP 2 OF AVO. VERIFIED ESC HAS ALL REQUESTED THICKNESS DATA AT THIS TIME. ACCOMPLISHED STEP 3 OF AVO 17835 REV A