After 3500 operating hours or 7 years
Actual operating hours
Type of maintenance work Carried out Date, signature
Maintenance as per mainte-
nance schedule (see operat-
ing instructions)
Installation maintenance
kit .....-a
Breathing air sample
Other items
After 4000 operating hours or 8 years
Actual operating hours
Type of maintenance work Carried out Date, signature
Maintenance as per mainte-
nance schedule (see operat-
ing instructions)
Installation maintenance
kit .....-abc
Breathing air sample
Other items
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