TUSA RS-670 1st Stage Recall

SUBJECT: RS-670 BLC Plug Replacement

Affected Units:
Approximately 200 units of R-600 1st stages with S/N’s between:
UR600022 – UR600029
UR600031 – UR600103
UR600637 – UR600676
UR600708 – UR600716
UR600737 – UR600776
TUSA was recently informed about the possible loosening of the BLC plug on the R-600 1st stage. There is a slight chance this may cause a high-pressure leak creating an unstable intermediate pressure. Immediate return of the units is requested.