Turn and Slip Indicator Failure

T-45C TS & ADV BIFP-09

Instrument Failures

The procedure for dealing with an ADI failure is:

1. Use the standby attitude indicator (AI) for attitude reference.

2. If available, use the HSI for your primary heading reference; if not, use the standby

compass.

3. Maintain VFR and VMC conditions, if possible.

4. Report essential ADI instrument failure to ATC.

5. Be alert for any progressive failure of attitude and navigation information sources.

6. Land as soon as practicable.

TURN AND SLIP INDICATOR FAILURE 1.8.1.7.10.2

A turn and slip indicator is part of the ADI display page. It is backed up by a stand-

alone (the standby) turn and slip indicator located on the left side of the main instrument

panel. In the rare event that both turn needle indicators fail, the pilot will have to use

airspeed and bank angle to perform standard and 1/2 standard rate turns.

A total loss of the ADI display page, including the electronically displayed turn and slip

indicator, is unlikely, unless associated with physical damage, a DEU failure, or an

electrical power problem. An additional failure of the stand-alone turn and slip indicator

is even more unlikely.

If a malfunction of the MFD turn and slip indicator is suspected:

•

Check the indicator against the standby turn and slip indicator.

•

Check the indicator against the ADI and standby AI bank indications.

•

Check the indicator against rudder pedal position, and against the rudder trim

position indicator.

•

Check the indicator against any physical sensation of a slip.

•

Check the DATA display page for any related OPGO/DEGD alerts.

If the ADI turn and slip indicator is inaccessible, or its indications are incorrect, modify

your cross-check to include the standby turn and slip indicator.

There is no specific procedure for dealing with a simultaneous malfunction of both slip

indicators, because that circumstance is very unlikely. Also, the impact of losing both

sideslip indicators is not critical enough to warrant a prescribed remedial action.

The procedure for dealing with a failure of both turn and slip indicators is:

1. Check the ADI(s) to validate correct indications.

2. Be alert to possible electrical problems.

3. Use the ADI or standby AI (whichever is available) and airspeed indicator for

controlling turn rate.

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