ReferenceModification no.
- 5 -
Page
111
Date
2003 03 01
Main
914 F
d03048
12.3.23) Renewal of rubber parts
Renew rubber parts acording to Maintenance check list.
All rubber hoses are subject to renewal. Affected are the venting ho ses of the
carbs, air pressure hoses to fuel pressure control and pressure sensor, hoses
on compensating tube as well as all rubber hoses of the cooling system.
Renewal of the diaphragm on both carburetors, see chapter 13.1).
12.3.24)Overhaul
The overhaul of engine is necessary after a certain engine run time or
period of time from the first starting of engine (whichever comes first).
1)
An extension of the time between overhaul is possible and regulated
through Service Bulletins (SB) for the respective engine type. Already done
extensions can be taken out of the engine log book and/or the release
certificate. Necessary modifications must be done by an authorized mainte-
nance facility. See chapter 11.3)
For the overhaul remove engine from aircraft and send it in clean and
preserved condition to an authorized overhaul facility.
If the engine is shipped to an overhaul facility, include the following in the
shipment:
- engine log book
- service record (life act) of the engine
- all parts of equipment like carburetors, filter, intake silencer, ignition unit,
vacuum pump, hydraulic governor, engine frame, fuel pumps, oil tank,
external alternator
- indication of total time of operation
- statements to the aircraft used
- useful notes and observations regarding the engine.
At receipt of an engine for overhaul a test run is conducted, followed by tear-
down inspection with recording of findings, and necessary repair work carried
out afterwards.
The overhauled engine is subject to a running-in period and a final perform-
ance check.
The overhaul is indicated on the name plate. Each overhauled engine is
accompanied by the report of engine repair with filled-in data sheets.
The overhaul of an engine is registered in the Overhaul Manual.
Engine
Type description
engines af fected
engine s/n
TBO
Time Between Overhaul
deliverables SB for
extension of the TBO
914 F
up to and incl. 4,420. 313
1000 h or 10 years,
whichever comes first
SB-914-027
(1000 h to 1200 h
or 12 years)
914 F
from 4,420.314
1200 h or 12 years,
whichever comes first
none
05615