Flashcards in C4 Deck (29):
PMU NP limits?
PMU on= NP limited at l 06
PMU off=NP limited to 102
When NP drops below 40-50%, what happens to the PMU?
the PMU switches to the 28 VDC battery (same happens when the PMA fails)
PMU idle Ground/Flight
Ground Mode Idle is 60-61%, In Flight Idle is 67%.
Above_________, the PMU raises N 1 to maintain NP above _______.
Illumination of both the PMU status and PMU fail indicates the system is in ________
The PMU status light will illuminate ______ after landing (weight on wheels) if fault conditions that are not serious enough to revert the system to manual are encountered in flight.
The PMU STATUS light in flight means what?
A fault in the weight on wheels switches. The PMU will not revert to ground mode. A longer landing roll must be expected.
If the PCL is placed in cutoff with the PMU in OFF and the PROP SYS circuit breaker
pulled, the propeller will not rapidly feather and may not fully feather until after landing.
If the rate of change of propeller RPM exceeds the PMU sensor validity check limit, the PMU will assume a sensor failure has occurred, and clashes will be displayed for Np and Torque. If the dashes were caused by a propeller RPM rate limit exceedence, do what?
cycle the PMU switch, it will restore the displays
During an auto start or normal operation with the ignition switch set to ___ ., the PMU will energize and deenergize the igniters as required
With the Piv!U functioning, the mechanical overspeed govenor modulates oil pressure to the propeller pitch change piston to limit Np below __ percent
Engine starts are NOT recommended with the PMU in the manual mode
If faults prevent the PMU from setting the requested power or respecting engine limits, or the pilot switches the PMU OFF, the system will revert to the manual mode
During a normal (auto) start, the PMU can automatically abort the start if necessary to avoid a hung/hot start or if any engine start parameter is exceeded.
Red Oil Pressure Limits:
i. 15-40 PSI more than 5 seconds
ii. Below 15 PSI
iii. 40 PSI or below
At idle power during acrobatics or spins, allowable transient oil pressure is __ psi for a
maximum of __ seconds.
Maximum oil pressure during start is __ psi
Normal oil pressure during steady state conditions is ____ PSI
The amber L FUEL LO AND R FUEL LO annunciators activate when fuel below how many pounds?
110 pounds in either tank
The fuel gauge will turn yellow at _____, telling the pilot that acrobatic maneuvers arc
Oil must be serviced within _____ minutes of engine shutdown. For most accurate results, check oil level ____ minutes after shutdown.
As AOA approaches stall angle (approximately _____ units on the gage), the AOA computer activates the _________, (15-16 units) providing stall warning
18, stick shaker
How long should Np be stable below 40% (boldface)?
Flattening, twisting, kinking or denting of the fire detection loop will affect test or flight operation.
Execute the Emergency Engine Shutdown On The Ground checklist when?
A. engine fire
B. prop strike
C. if the aircraft appears likely to depart the prepared surface
D. Fuel Flow
E. Chip Light
F any other serious ground emergency
When to Complete an AGSM
In a GX
Loop pull through
Split-S pull through
Nose Low Recovery
Perform a G-awareness exercise or AGSM demonstration before accomplishing any maneuver that may require 3 Gs or more.
The AGSM cycle should last from 10 to 15 seconds with at least 4 to 5 breathing cycles.