Trans-Cal SSD120-N-RS5, Owners & Installation Manual, Page: 44 / 57

Section 7.0 Instructions for Continued Airworthiness
The SSD120-(XX)N-RS5 is an all solid-state device and requires no periodic maintenance to
maintain its airworthiness. The altitude encoder is to be tested during the aircraft biennial
transponder and pitot-static system test as required by Federal Aviation Regulations. If the
altitude encoder reports an error in excess of ±125 feet when compared to the primary flight
altimeter, then recalibration as per §4.0 of this manual is required. If the error cannot be corrected
through this procedure, then the unit is to be repaired or replaced. Contact Trans-Cal Industries
for further information.
Section 8.0 Adapter Plate Ordering Information
The adapter plates listed below will allow the use of competing digitizer manufacturer’s and older Trans-
Cal quick release mounting trays with the SSD120-(XX)N-XXXXX. These adapter plates are designed to
allow for quick replacement of altitude encoders.
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Manufacturer Model TCI Adapter Plate Part Number
ACK Model A-30 103059
Ameri-King Model AK350 Series 103061
Narco Model AR-500 No adapter required.
Narco Model AR-850 103038 (same as TCI plate below)
Shadin Model 8800-X Series 103060
Sandia Model SAE5-35 103035
Trans-Cal Model D120-P2-T 103036
Trans-Cal Model SSD120-(XX)A 103038
Pictured below is the SSD120-(XX)N-RS5 mounted on adapter plates and quick release mounting trays
for several competing devices. Quick release mounting trays are NOT included with the adapter plates.