What happened
On May 18, 2017, an E190-100SR was at Warsaw Chopin Airport (AD EPWA) for a scheduled "C1 Check" maintenance procedure. While technicians were performing tasks related to the maintenance task card 52-42-40-004-AFTRH/RH, they discovered that the cover for the emergency escape slide at the rear service door had become unfastened.
Following this discovery, the unfastened emergency slide cover was replaced with a new unit to ensure the aircraft's safety systems were properly secured.
The investigation
The investigation focused on the circumstances surrounding the unsecured cover during the maintenance process. The investigation concluded without identifying a specific cause for why the cover had become unfastened.
Findings
- The primary finding was the presence of an unfastened emergency slide cover on the rear service door.
- The cause of the unfastening could not be determined.