Extra 300S - Emergency Procedures; General; Limitations; Normal Procedures

Section 905
Digital RPM Indicator
Page Date: 20. April 2002 905 - 3
Pilot´s Operating Handbook
EXTRA 300S
905 DIGITAL RPM INDICATOR
905.1 GENERAL
The EXTRA 300/S can be equipped with the optional "P-1000" Digital RPM indicator alterna-
tiv to the mechanical VDO RPM indicator.
905.2 LIMITATIONS
The operation limitations are not affected due to the installation of the "P-1000" Digital RPM
indicator. The face of the indicator is placarded with the unchanged Engine RPM operating
range. Additional the operating RPM ranges are indicated on the large green, yellow, and
red LEDs. These LEDs are located on the upper right corner of the indicator face.
905.3 EMERGENCY PROCEDURES
Not affected.
905.4 NORMAL PROCEDURES
The Normal Procedures have to be changed in Chapter "4.5 Take-Off Procedure" section
"4.5.1.Before take off". If the P-1000 RPM indicator is installed, the mag-drop test has to be
carried out in the following manner:
Magneto check
Engine RPM: 1800 min
-1
Pay attation to the three small LEDs in the "Status" area on the upper left corner of
the P-1000 face:
Ignition switch position: LEFT
Status area: Left red LED illuminates
Display: shows RPM drop
Ignition switch position: RIGHT
Status area: Right red LED illuminates
Display: shows RPM drop
Ignition switch position: BOTH
Status area: Right and left red LED off illuminate
The middle LED is not allowed to alert,
otherwise the difference is more than
permissible.
During the short circuit (grounding) of a single magneto, the respective red LED has to be
illuminated. The maximal allowed RPM drop at 1800 min
-1
is 175 min
-1
. The maximal
difference between the magnetos has not to be over 50 RPM (identify with the illuminated
yellow LED).
Green -------- Yellow -------- Red --------
2400 2700 3500
700 2400 2700
NOTE