Service difficulty report · Spar · Swrngn SA227AC

Difficulty date
November 16, 2010
Submitted
March 15, 2011
Operation
Air carrier
Make and model
Swrngn SA227AC
Aircraft time
29,144 hours
Engine
Garrtt TPE33111U
System (JASC)
5751 · Ailerons
Part
Spar
Part number
2734023004
Condition
Cracked
Location
Rt Wing Aileron
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

(CAN) AILERON REMOVED FOR SKIN CRACKING ON UPPER AFT SKIN OF OTBD HINGE. FURTHER INVESTIGATION REVEALED SEVERE CRACK IN THE SPAR WEB AS WELL ON THE UPPER HINGE BRACKET. THE RIB DIRECTLY BEHIND THE HINGE POINT WAS ALSO FOUND CRACKED. THE CRACK IN THE STRINGER EXTENDS ACROSS THE STRINGER, SEVERING IT IN TWO. FURTHER INSPECTION HAS FOUND THE SPAR WEB AT THE CENTER HINGE ATTACH POINT WAS ALSO CRACKED NEAR THE LOWER RADIUS. CAUSE UNKNOWN AT THIS TIME, SEE ATTACHMENTS.