Piper PA-24-250 Comanche User Manual

Aircr.xR Publications
Piper Comanche 250 (Early Model)
Section - 3
Emcrgcncy Procedures
GYRO SUCTION FAILURE
Suction below 4.8 in Hg
RPM .................... .... ................................................................................ Increase to 2575
Altitude
........................................................................................ Descend to Maintain 4.8 in Hg
Use electric turn indicator and magnetic compass to monitor artificial horizon and directional gyro.
If adequate gyro suction can not be maintained: Initiate VFR or partial panel IFR procedures as
appropriate.
Land as soon as practical and investigate cause.
PROPELLER OVERSPEED
** NOTE ** The McCauley propeller defaults to low pitch (high rpm) if oil pressure fails
If propeller overspeed occurs, and the airplane is equipped with a McCauley propeller:
Oil Pressure
...................................................................................................................... Check
If there is a low oil pressure condition: Land as soon as practical and investigate cause.
Prepare for a
Power Off Landing. (Page 3-5)
If overspeed is due to propeller governor malfunction:
Throttle
...................... .... ............................................................................. .... Retard
Propeller Control
.......................... .............. ................................................... Aft - Decrease rpm
Airspeed
...................... .... ......................................................................................... Reduce
Throttle
........................................................................ As Required to Remain Below 2575 rpm
Land as soon as possible and investigate cause.
OPEN DOOR IN FLIGHT
If door latches are not secure, the door will trail slightly open and airspeed will be slightly reduced.
To close door in flight:
Airspeed
........................... ... ............................................................ Below 100 mph (87 kt)
Cabin Vents .................................................................................................................... Close
Storm Window
.................... .. ..................................................................................... Open
Slip Airplane
.................... .. ..... ............. ................................................ Facing Door Into Wind
Latch
......................................................................................................................... Secure
An open door in flight presents no real danger. However, the high level of noise caused by an
open door can give concern to passengers and be distracting to the pilot. If unable to close the
door in flight, land as soon as practical.
Copyright: 1993
Page 3-7

Piper PA-24-250 Comanche Specifications

General

Brand	Piper
Model	PA-24-250 Comanche
Category	Aircrafts
Language	English