JOINT ADVANCED MULTI-ENGINE T-44A
is centered. Maximum split between pilot needle and CDI should be 4º. Pilot rotates course
selector left and right of the centered CDI. CDI should reach full deflection at 10º in each
direction. Continue rotating course selector and note "to-from" flag change to "from" as
selector passes approximately the 90º position.
Ensure the DME is indicating correctly. DME usually reads between 0.2 and 1.0 at most
points on the surface at NGP. Compare the radials and DME to a ground checkpoint if
available. If not available, compare to the radial and DME indicated during the VOR checks.
DME should be within +0.5 NM, or 3% of the actual distance to the NAVAID, when compared
to a ground checkpoint.
A typical report would be:
(Pilot)"TACAN needle indicates 196°, CDI centered on 195°.
DME indicates 0.5."
(CP)"TACAN needle indicates 195°."
NOTE: CP's CDI and "to-from" indicator is never functional in TACAN.
Pilot presses TEST pushbutton on TACAN control panel on pedestal. Pilot and CP verify
TACAN needle pointing 180º (+ 2). Pilot verifies DME top row reads 0.0 or 0.1 and bottom
row reads all 8's. Pilot releases TEST pushbutton and notes DME top row reads all 8's.
NOTE: If the TACAN panel TEST switch is inoperative, utilize the TEST switch on the DME readout panel. The
system check is identical using either switch.
NOTE: DME test readout usually returns to normal in approximately 12 seconds.
A typical report would be: (pilot)"TACAN needle indicates 181°. DME 0.1, all 8's."
(CP)"TACAN needle indicates 180°."
Pilot ensures ADF switch is on, TONE pushbutton is out, and ADF pushbutton is
depressed. Pilot presses ADF button on CDPU and tunes 0382 (CONNOR LOM). Press USE
and note 0382 displayed in ADF 1 RRU.
NOTE: NDBs used for navigation normally range from 190 to 535 kHz. The ADF is capable of receiving
frequencies up to 1749, such as commercial radio stations. Four digits are required input for all stations.
Therefore, navigation frequencies must be entered with a zero preceding the 3-digit number.
Verify ID and adjust volume as required.
Pilot selects ADF needle on RMI (single needle, left pushbutton). CP also selects ADF
needle on RMI (single needle, left pushbutton).
Pilot and CP verify ADF needles point to CONNOR (approximately 290 to 300 degrees).
P presses ADF TEST pushbutton on MSU. Pilot and CP verify ADF needles rotate
counterclockwise 90º and stop. Release pushbutton and verify both needles return to correct
bearing. Movement should be positive and without ratcheting.
NOTE: The ADF will not test (needle remains parked at 270-090) if an NDB is not received or if the ADF
pushbutton is not depressed.
Pilot and CP return RMI needles to VOR.