Instructions on maintenance and repair of FP11.2k and SKGG-1 are added in the Section "Maintenance documentation", and maintenance instruction on sensor block BD SKGG-1 is updated.

Instruction on FP12 adjustment is added in the Section "Gas mixture adjustment" and Instruction on FP11 is updated (minor changes to the mixture-feed scheme).

Instruction on operational devices connection to two modifications of FST-03 is added in the Section "Passports"