Service difficulty report · Skin · Boeing 737924ER

Difficulty date
July 4, 2019
Submitted
July 5, 2019
Operation
Air carrier
Aircraft
N37471
Make and model
Boeing 737924ER
Aircraft serial
37102
Aircraft time
21,887 hours, 7,632 cycles
Part
Skin
Condition
Punctured
Location
Fuselage
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

DURING #2 SVC CHK FOUND A PUNCTURE IN THE FUSELAGE SKIN 1 INCH AFT OF STA 807 AND 2.5 INCHES BELOW STR 23 LEFT. MEASURED DAMAGE AND SUBMITTED DRAWING TO ENGINEERING. REMOVED RIVETS & TRIMMED OUT DAMAGE PER AVO# ESC190627-0471-1 NO CRACKS. REQUEST INSPECTION TO PERFORM HFEC EDDY CURRENT TO VERIFLY HFEC COUNTERSUNK HOLES. FOUND NO "CRACKS" IN COUNTERSINKS. PERFORMED HFEC OF THE EDGE OF TRIM OUT PER NDT 6-51-00-00-FIG 23 PERFORMED ULTRASONIC THICKNESS CHECK OF BLENDED AREA AND MAPPED THINNEST WAS 0.067. PERFORMED BHEC ON ALL REMOVED FASTENER HOLES PER NDT 6-51-00-00 FIG 16. NO CRACKS NOTED.AVO #ECS190627-0471-1 NO CRACKS NOTED. ALSO HFEC OF BLEND OUT SAME REF, NO CRACKS. 2 FILLERS NEEDED PER AVO ESC190627-0471-1B MATERIAL VERIFICATION FOR DOUBLER AND PO .080 2024T3 8602184. PO .071 2024T3 8487010320 VERIFIED MATERIAL STEP 12 OF AVO 190627-0471-1C BLEND OUT COMPLETED COMPLIED WITH STEP 11 PER AVO/ESC 190627-0471-1C. CREATED 2 EACH LOGS FOR FURTHER DAMAGE FOUND. # 3615224 AND # 3615182. 51-00-00-23. NO/NONE CRACKS FOUND. C/W PART 4 THICKNESS MEASURE 51-00-00-03/ REMAINING THICKNESS IS 0.026. COMPLIED WITH STEP 12 PER AVO/ESC 190627-0471-1C. C/W PART6 HFEC FABRICATED -1REPAIR DOUBLER -2 STRUCTURAL FILLER -3 STRUCTURAL FILLER REF AVO190629-0471-1STEB B SKIN REPAIR FABRICATION AND APPLIED STEP B FINISHES CW VERIFIED STEP B , FAB AND FINISH C/W INSTALLED COUNTERSINK REPAIR WASHERS REF AVO190629-0471-1 OK TO INSTALL DOUBLER AND FILLERS. STEP B SKIN REPAIR INSTA