MAINTENANCE MANUAL
SAVANNAH S
Doc. No.:
MM-SVNH-EN
Revision:
07
Rev. Date:
07/11/2022
Proj. Ref.:
SVNH S
A/C:
Savannah S
Applies to Generic Serial Number:
yy-mm-54-xxxx
Page:
37/132
DOC
FMM00
4. Maintenance Schedule
The maintenance schedule represents the intervals between each maintenance has to be executed
on the aircraft and its systems. Reading the maintenance of the airframe and its systems, this interval
is usually measured in terms of Flight Hours, which are the sum of differences of take-off and landing
times for each flight. Instead, the maintenance of the powerplant is spaced in terms of Operating
Hours, which is the sum of the entire period between the system is active (i.e. the engine is on,
mainly). In order to not split the airframe and powerplant maintenance schedule, preventing
confusion or problems of maintenance records, for the present manual is established to apply the
maintenance schedule in respect of the most restrictive method, which is normally the Operating
Hours of the engine. This time interval is indicated and measured by the digital Hourmeter instrument
of the engine (or eventually the analogic one). Exception from this timing system is allowed only if a
complete and detailed system of Flight Hours record (aircraft logbook and maintenance logbook) is
used, in certified airport only (verifiable intervals of time).
Always record in the aircraft maintenance logbook the maintenance performed and any variations in
respect of the scheduled list or unscheduled maintenance.
The maintenance action can be executed with a tolerance of +/-5 Operating Hours or +/-1 month
(where applicable for this section) between two consecutive scheduled works. The next maintenance
action must be planned by adding the interval from the Operating actual Hours of the last performed
one: i.e., if the first one has been executed at 93 hours, the next one must be planned at
93+50=143+/-5 [hrs]. The tolerance must not be used to plan each time the maintenance work
increased of the tolerance itself; the schedule must be followed.
WARNING
Exceeding the maintenance intervals of more than the Operating
Hours plus tolerance established by the present aircraft Maintenance
Manual or the equipment manufacturer Maintenance Manual implies
a decline of airworthiness and can lead to a safety problems.
WARNING
For complete engine and other equipment checks and maintenance,
always refer to the original approved Maintenance Manual and
Service Bulletins issued by the manufacturer of each relative system.
Maintenance
work
Operating Hours
Year
First
25
50
100 150 200 250 300 350 400
…
1000 2000
1
50
x
x
x
x
x
x
x
x
x
…
x
x
x
100 h / 1 yrs
x
x
x
x
x
…
x
x
x*
200
x
x
…
x
x
1000
…
x
x
2000
…
x
NOTE:
* The maintenance called
100 flight hours / 1 year
is to perform alternatively every 100 operating hours
or 1 year of time period starting from the last maintenance performed, whichever comes first.
Table 17: Maintenance schedule