SDR DOSS08

Service difficulty report · Longeron · Let L23SUPERBLAN

Difficulty date: May 2, 2006
Submitted: May 9, 2006
Operation: General aviation
Aircraft: N433BA
Make and model: Let L23SUPERBLAN
Aircraft serial: 029014
Aircraft time: 978 hours
System (JASC): 5313 · Fuselage Main, Longeron/Stringer
Part: Longeron
Condition: Cracked
Location: Rear Cockpit
Part time: 978 hours
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

FIRST LONGERON (N434BA) WAS FOUND CRACKED AT THE ELEVATOR TRIM GUIDE ATTACH POINT, NEAR THE RCP LH RUDDER PEDAL, DURING A SCHEDULED INSPECTION. SUBSEQUENT FINDINGS OCCURRED AS RESULT OF QUALITY DEPARTMENT ISSUING A ONE TIME INSPECTION OF ALL MDS. IT LOOKS AS IF THE OPERATOR, IN THE REAR COCKPIT (RCP), MAY BE STRIKING THE ELEVATOR TRIM GUIDE WITH HIS/HER FOOT WHILE ACTUATING THE RUDDER PEDAL - CAUSING THE SUPPORT STRUCTURE (LONGERON) TO WEAKEN AND FORM CRACKS AT THE ATTACH SCREWS.