Unreliable Airspeed B767 specific procedure
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Joined: Aug 2009
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From: india
Unreliable Airspeed B767 specific procedure
Hi ! Can someone explain-
in the Qrh explanations for unreliable airspeed-
it says that Rudder ratio fault is an indication of UAS , how is it correlated ?
in the Qrh explanations for unreliable airspeed-
it says that Rudder ratio fault is an indication of UAS , how is it correlated ?
Joined: Oct 2001
Posts: 194
Likes: 2
From: MAN
It doesn’t say RUDDER RATIO is an indication of unreliable airspeed. It says:
“Display of one or more of the following EICAS messages may be evidence of unreliable airspeed/Mach indication:
•AILERON LOCKOUT
•ALT DISAGREE
•CAPT PITOT
•F/O PITOT
•IAS DISAGREE
•L AUX PITOT
•OVERSPEED
•PROBE HEAT
•R AUX PITOT
•RUDDER RATIO”
Basically, faults that may corrupt the input to the ADCs such as PROBE HEAT or failure of systems that have an ADC input such as RUDDER RATIO, may be an indication or confirmation of unreliable airspeed.
“Display of one or more of the following EICAS messages may be evidence of unreliable airspeed/Mach indication:
•AILERON LOCKOUT
•ALT DISAGREE
•CAPT PITOT
•F/O PITOT
•IAS DISAGREE
•L AUX PITOT
•OVERSPEED
•PROBE HEAT
•R AUX PITOT
•RUDDER RATIO”
Basically, faults that may corrupt the input to the ADCs such as PROBE HEAT or failure of systems that have an ADC input such as RUDDER RATIO, may be an indication or confirmation of unreliable airspeed.
Last edited by Beakor; 17th October 2022 at 16:47. Reason: Typo
