Service difficulty report · Tail Boom · Snias AS350B3

Difficulty date
July 30, 2021
Submitted
July 30, 2021
Operation
Air carrier
Aircraft
N279AM
Make and model
Snias AS350B3
Aircraft serial
4685
Aircraft time
5,315 hours, 12,708 cycles
Engine
Tmeca ARRIEL2B1
Engine time
7,577 hours, 13,985 cycles
Part
Tail Boom
Condition
Chafed
Location
Zone 300
Part time
5,315 hours, 12,708 cycles
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

4685 LOWER FWD TAILBOOM SKIN HAS TWO CHAFING MARKS ON ITS RH LOWER INTERNAL FACE LOCATED BETWEEN THE TAILBOOM JUNCTION FRAME AND THE X620 CIRCUMFERENTIAL FRAME CAUSED BY A WIRE HARNESS. THE LARGER OF THE TWO WAS MEASURED AT APPROXIMATELY .007” IN DEPTH, 1.2” IN LENGTH, AND .200” IN WIDTH. THE SMALLER CHAFE WAS MEASURED APPROXIMATELY .007” IN DEPTH, .150” IN LENGTH, AND .250” IN WIDTH. BELOW IS A QUICK SRM REFERENCE, AND ATTACHED WILL BE PHOTOS OF THE DAMAGED AREA