Incident Overview
On 28 August 2019, at the LPR Aviation Training Centre base in Warsaw-Bemowo (EPBC), a pilot conducting a pre-flight inspection on a Tecnam P2008JC aircraft identified abnormal elevator operation. During a routine check of elevator control freedom, the elevator would lock in the selected position, and distinct scraping noises were audible from within the fuselage. The aircraft was immediately withheld from flight operations.
Findings
Because the aircraft was under warranty, the manufacturer was notified of the issue. A mechanic from the manufacturer arrived and performed an inspection. The mechanic found that the lubricant had been depleted from the elevator bearings and other associated control components. The mechanic subsequently applied lubrication to the bearings and all elevator control elements. A functional test of the elevator system was then carried out with positive results.
Cause
According to the investigation, the event was caused by the loss of lubricant in the bearings and elevator control components.
Actions Taken
The aircraft was returned to service after the corrective maintenance. The training centre personnel were briefed on the incident. No safety recommendations were issued by the Polish State Commission for Aircraft Accident Investigation (PKBWL).