IN101 - INST DISPLAYS/CROSSCHECK Flashcards
Define the control and performance concept
An a/c is controlled in flight by adjusting the attitude and power to produce the desired results
Three categories of instruments
Control, Performance, Navigation
What are the control instruments?
EADI and Primary Engine Data Display
Cross check should originate from EADI. Both instruments display immediate attitude and power indications.
What are the performance instruments?
Altimeter, Airspeed Indicator, VSI
They indicate a/c’s actual performance. Others include:
EHSI, AOA indicator, Turn and Bank indicator
Describe the control and performance procedure
- Est altitude and power settings on the control instruments
- Trim out control pressures
- Crosscheck performance instruments to determine if the a/c is providing desired results
- Adjust power as indicated on PEDD or attitude on the EADI, as necessary
Changing pitch attitude without a power adjustment affects:
ASI, Altimeter, VIS, AOA
The primary reference during a level turn is what?
EADI
What is the primary reference for power control?
PEDD
What should you cross-check anytime you add power?
ASI, VSI, Altimeter, EADI, Turn and Bank indicator
T/F: Performance instruments (VSI/Altimeter) lag behind control instruments
True
What method is used to cross-check?
Hub and spoke
Turn cross-check procedure
- Starts with EADI to set bank
- Move to EHSI to determine leadpoint and roll out HDG
- Scan other performance instruments: VSI, ASI, Alt
Descent/Climb cross-check procedure
- Set pitch attitude and power setting (EADI/PEDD)
- Cross-check VSI and Alt
- Cross-check/Adjust control instruments (EADI/PEDD)
Standby Instrument use
- Move cross-check to STBY instruments and remain with them
- Small changes are harder to detect
- Be aware of parallax error due to seat position
- Increase scan speed
Attitude instrument tolerance
Indicators erect and AOB vertically aligned with 0 bank