CR-MM-1-0-00
PS-28 Cruiser
PS-28N Cruiser
CHAPTER 10 – POWERPLANT
Date of issue: 2018-09-27
Revision No.: 22
10 - 37
10.4 Check / Adjustment
10.4.1 Engine test
CAUTION:
THE PERSON PERFORMING THE ENGINE TEST MUST BE REPAIRMAN/
A&P WITH A VALID CERTIFICATE AND WITH REGISTERED ENGINE
TYPE ROTAX 912 S2 / ULS2.
(a) Perform the test out of the buildings at the place assigned for performing engine tests in
broad daylight.
(b) Test place must be equipped with extinguisher which is suitable for extinguishing burning
liquids and electrical installation.
(c) Brake the airplane and put the chocks under the landing gear wheels.
(d) Before performing engine test, carry out engine and propeller preflight check in the range
shown in the POH, Section 4.1, and the Rotax Operator’s Manual, Section 3.
(e) Start the engine according to the POH, Section 4.2 and the Rotax Operator’s Manual,
Section 3.
- activate starter for max.10 sec. only, followed by a cooling period of 2 min.
- as soon as engine runs, adjust throttle to achieved smooth running at
approximate 2,500 rpm
- check if oil pressure has risen within 10 sec. and monitor oil pressure
NOTE:
If oil pressure do not rise within 10 sec. above min. pressure 0.8 bar (12 psi),
switch off the engine. Is admissible max. oil pressure 7 bar (102 psi) for a short
period at cold start. Fuel pressure has been in range from 0.15 to 0.4 bar (2.2
to 5.8 psi).
(f) Engine warm up according to the POH, Section 4.2.3 and the Rotax Operator’s Manual,
Section 3.
As soon as oil pressure will be in range from 2 to 5 bar (
29 to 73 psi
) start warming up period
at 2,000 rpm for approx. 2 minutes, continue at 2,500 rpm, duration depending on ambient
temperature, until oil temperature reaches 50 °C (
122 °F
).
(g) Choke – during engine warm up -
OFF
.
NOTE:
Watch engine instruments and record the values of oil pressure, oil
temperature and head cylinder temperature into the Engine test report, see
the Tab. 10-1.
(h) Ignition check:
Engine speed .............................. 4,000 rpm
Ignition switch .............................. switch from position
BOTH
to
L
, record rpm drop
Ignition switch .............................. switch from position
BOTH
to
R
, record rpm drop
NOTE:
Rpm drop between position
BOTH
and
L
or
R
must not exceed 300 rpm.
Mutual difference between ignition circuits
L
and
R
must not exceed 115 rpm.
Write down results into the engine test report, see the Tab. 10-1.
(i) Test of max. rpm on the ground:
Throttle ........................................
MAX
NOTE:
Record max. rpm into the engine test report, see the Tab. 10-1.
