FSD International
Commander 115 TC
Pilot Operating Handbook
- 25 –
Copyright© 2008 by FSD International. All rights reserved.
For use with Microsoft Flight Simulator only. Not to be used for real-world aviation.
6.
Oil pressure gage
7.
Manifold pressure gage
8.
Tachometer
9.
Stall warning system
10.
Gyros, part (depends on specific equipment) I 1. All lighting, interior and exterior
11.
All avionics (except EL T)
12.
Vacuum pump failure indicators (SIN 14654 and subsequent)
3.7.15 VACUUM SYSTEM MALFUNCTION
Suction to operate the direction gyro and attitude indicator is provided by two engine-driven
vacuum pumps. A suction gauge monitors the system for indication of correct suction pressure.
Normal suction pressure is 5.1 (± .1) inches of mercury. Directly below the suction gauge are two
vacuum pump failure indicators. These indicators are either mechanical (SIN 14541 thru 14653) or
electrical (SIN 14654 and subsequent). A vacuum pump failure will be indicated when the suction
of that pump drops to 3.5 inches of mercury.
If the failure of one vacuum pump is indicated then flight may be continued under VFR, night, and
IFR conditions. One vacuum pump is adequate to provide suction for the direction gyro and attitude
indicator. However, vacuum pump redundancy is lost. The inoperative pump should be repaired as
soon as practical to return that redundancy.
If the failure of both vacuum pumps is indicated, then the direction gyro and attitude indicator
should be considered inoperative. In VFR and night conditions flight may be continued. If the
failure of both pumps is indicated in IFR conditions then standard procedures should be followed
and the aircraft landed as soon a practical. The aircraft cannot be flown again in IFR conditions
until at least one of the vacuum pumps has been repaired.