STEMME S12 User Manual

DOCUMENT NUMBER:
L500-912.820 ISSUE JUL 20, 2016
AMENDMENT: 00
DATE: 
CHAPTERPAGE 511
MAINTENANCE MANUAL STEMME S12
5.3.3 UNSCHEDULED MAINTENANCE
AIRWORTHINESS DIRECTIVES AND SERVICE BULLETINS
In addition to scheduled maintenance described above, the need for special inspections and addi-
tional maintenance may arise. Normally, these situations will be publicized with a manufacturer’s
Service Bulletin (SB) or an Airworthiness Directive (AD) published by the responsible authority
(e.g. EASA / FAA). Such notices typically include a deadline to complete the required actions.
Compliance with Airworthiness Directives is mandatory.
STEMME strongly recommends that owners and operators, as a matter of prudence and ight
safety, fully and promptly comply with all relevant Service Bulletins (except Service Bulletins
classied as “optional”).
ABNORMAL OPERATIONS
Abnormal airplane operations require special maintenance checks. Unscheduled checks following
overweight or hard landings, over-speed ight, severe air turbulence, lightning strike, foreign-ob-
ject damage, and high drag or side loads due to ground handling should be performed by an
authorized maintenance person.
The inspector must conduct the relevant section 5.4. Annual Inspection of the potentially
damaged components and systems, e.g. landing gear, control surfaces, tail boom, empennage,
etc. as appropriate and needed to assure airworthy condition of the aircraft.
In any case of doubt concerning the condition and possible unrevealed damage, the owner or
operator is advised to contact the manufacturer or another appropriately approved maintenance
organization specialized on diagnosing and repairing the aected type of components or systems.
Unscheduled Maintenance for Propeller Assembly, Engine Drive Section, and Front Gear Box Com-
ponents
An unscheduled inspection, overhaul, repair, or replacement is mandatory following each case of:
• Sudden Stop or any Impact (possible ground contact) of the Propeller that reduces engine
RPM, or
• Failure to perform the periodic inspections specied in the S12 Maintenance Manual, or
• Foreign Object Damage (FOD)
If the inspection of the propeller indicates detectable damage beyond mere cosmetic distress to
the propeller, whether by ground contact, bird strike, stone strike or other impact, a qualied and
authorized maintenance person shall determine the extent of the damage.
For any damage which requires a Major Repair, the TC-holder or an approved agency must deter-
mine which parts of the complete drive system are aected and require repair (if practicable),
overhaul, rebuilding, or replacement. See detailed guidance for evaluating impact damage to the
Propeller in section 5.5.2 below.

STEMME S12 Specifications

General

Brand	STEMME
Model	S12
Category	Aircrafts
Language	English