Event Overview
On June 3, 2015, an Embraer 170-100 aircraft, operating under an unidentified airline, experienced a FLAP FAIL indication during approach to Warsaw Chopin Airport (EPWA). The flight crew proceeded with the landing in a configuration without flaps and slats, at a speed of 175 knots (Vref 115 + 60 knots, as per the Quick Reference Handbook). The crew submitted an Air Safety Report (ASR) after the incident. The aircraft was subsequently handed over to maintenance for inspection.
Investigation Details
The Polish State Commission for Aircraft Accident Investigation (PKBWL) classified the event as an incident. The investigation was overseen by Piotr Lipiec and conducted by the operator (user). No investigation team was formally appointed. The final report was issued on June 21, 2016.
Maintenance verification of the aircraft did not reveal any abnormalities with the flap system. Entries in the maintenance system (MERLIN) noted the FLAP FAIL indication and referenced the performance of Fault Isolation Manual (FIM) procedure 27-50-00-810-803-A, revision 34. No master caution or maintenance message correlations were found in the Central Maintenance Computer (CMC).
Cause
The stated cause of the landing without flaps and slats was the FLAP FAIL indication. However, the underlying reason for the indication could not be determined.
Preventive Actions
The operator checked the aircraft and found no issues. No safety recommendations were formulated by the PKBWL.