Originally Posted by
bf109
Good day to all, hope someone can help. We have a 737-200 with no PDC, instead there is an odd contraption that will give you the different EPR when selected(T/O, CLB, CRZ, G/A) ,the selector also has a manual entry for the temperature. As for the indicator it will show the TAT and the requested EPR. Any info on this would be appreciated.
Originally Posted by
bf109
I did figure out most of it but would like to know who makes it (Honeywell?) so I could get my hand on an operation manual.
Who knows if there is even a manual. But...
TAT – Max EPR Indicator
Total Air Temperature Indicator
• indicates ambient air temperature corrected for compression heating (ram rise)
• flag indicates a system or electronic failure
Maximum EPR Indicator
• provides a continuous indication of the maximum allowable EPR for the mode selected
• uses temperature input from the total air temperature probe and pressure altitude input from
the air data computer
• automatically adjusts for the use of engine bleed air
• flag indicates a system failure
Mode Selector
ROTATE – Selects inflight mode for maximum EPR.
• GA - Go-around thrust
• Cont - Maximum continuous thrust
• Clmb - Maximum climb thrust
• CRZ - Maximum cruise thrust
Mode Indicator
Indicates the mode selected
PRESS TO TEST –
Drives the TAT and MAX EPR indicators to preset test values to test the
system.
Test Values:
MODE MAX EPR TAT
CRZ 1.85 +05.0
CLMB 1.94 +05.0
CONT 1.94 +05.0
GA 2.03 +05.0