Avro RJX flies with first ‘Block 2’ AS577


The first production-standard ‘Block 2’ Honeywell AS977 has been fitted to the Avro RJX-85 development aircraft, msn G-ORJX (msn E2376), replacing one of the pre-production ‘Block 1’ engines previously fitted in the number 1 position. She made her first flight with the new engines on 6 July. The 50 minute flight was the 54th in the RJX development program. It brought G-ORJX’s total flight time to over 107 hours. Compared to the Block 1 engines, the Block 2 engines include performance-related developments to the fan/stator, to the combustor, and to the FADEC software, as well as durability and weight enhancements. After the initial Block 2 engine operability phase is completed, the remaining Block 1 engines will be replaced and performance trials will begin. Two additional Block 2 engines have already been delivered.

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