Diamond Aircraft DV 20 E 2022, Airplane Maintenance Manual

Page: 36 / 903

AIRCRAFT
Manual Organization
DV 20 E AMM
Page 2
15 Mar 2022
02-00-00
Doc # 4.02.25
Rev. 2
5. Service Bulletins
Service Bulletins get issued when necessary. They give the operator more information on inspections,
maintenance, repairs or modifications.
Service Bulletins have 4 categories:
A. Alert Service Bulletins
Alert Service Bulletins are issued if there is an immediate danger (risk of damage or total loss).
They are sent immediately by the fastest means to all known addresses of operators and service
stations which are affected.
B. Mandatory Service Bulletins
Mandatory Service Bulletins include the description of a problem and the solution. If you do not
follow a mandatory Service Bulletin, failures or malfunctions can result during further operation.
You must do the work given in a Mandatory Service Bulletin.
C. Recommended Service Bulletins
Recommended Service Bulletins give data about:
)
A minor problem and its correction.
)
A better technical design.
If you do not follow a Recommended Service Bulletin, it will not cause a failure. But it may cause
increased maintenance work.
If you do follow a Recommended Service Bulletin:
)
The maintenance work may be reduced (for example, reduced wear, increased life).
)
The operational behavior will be improved (for example, easier engine starting).
D. Optional Service Bulletins
Optional Service Bulletins give data about optional equipment that you can install in an airplane (for
example, sailplane towing device).
The airplane owner makes the decision to follow an Optional Service Bulletin.
6. Service Information
A Service Information tells the operator about permitted installations or provided information to installed
or additional equipment. It also gives the applicable technical data.