Turn coordinator

[SmolaTheMedevacGuy]

Hi guys, got another question for the Wise... :D

Why do the bigger airplanes have no turn coordinator? Or to put it in another way - where is it written, when it's not required? I've checked JAR-OPS, which state that a turn and slip indicator is nessecary, tha JAR-23 do not state anything...

Greetings
Smola

[Tinstaafl]

The rules give alternatives: A TC needed unless a certain number of independent AIs are fitted. Don't know where the JARs have put it though.

[ran]

usally the bigger planes have two independent systems and if euq. with EFIS there is a extra standby artifitial horizon req.

Ran :ok:

[SmolaTheMedevacGuy]

Okay, I have finally found it in JAR-OPS1. it is stated that if the airplane is equipped with a standby attitude indicator, only the slip indicator is required.

Greetings
Smola