Incident Overview
On July 14, 2016, a Boeing 737-800 (operated by Enter Air) experienced two unsuccessful attempts to start engine 2 while at Katowice-Pyrzowice Airport (EPKT). During the initial engine start, the N2 rotation did not reach the minimum 20% threshold. The flight crew performed the ABORTED ENGINE START checklist and then attempted a cross-bleed start using engine 1. This second attempt also resulted in a slow parameter increase, and the crew again aborted the start.
Crew Actions
After the second abort, the crew informed air traffic control (ATC) and taxied back to the parking position using engine 1. Once parked, the captain shut down the engines and reported the issue to the maintenance control center (MCC), making appropriate entries in the EDP-1 log.
Maintenance Findings
Maintenance personnel conducted tests and identified a mechanical failure of the temperature sensor at the high-pressure compressor inlet of engine 2. The damaged sensor was replaced, and after a successful engine run-up test, the aircraft was returned to service without restrictions.
Conclusion
The incident was attributed solely to the mechanical damage of the temperature sensor. No safety recommendations were issued.