ADS-B jet solutions.

With the new mandate fast approaching we’ve created a rule of thumb guide for the usual avionics suites supplied within the mid size jet solutions (particularly the Challenger series, Learjet series, Hawker series and Citation 560/XLS).

The ADS-B mandate, if I have a jet with…

Harry Lees, our principal European avionics consultant has over four decades of experience working across various types, here he explains the basics, solutions for ADS-B mid size jets and why action is required sooner than later.

Rockwell Collins Proline 21 aircraft with the TDR94D diversity Mode S transponders will typically have a GPS4000A or GPS4000S GPS system. Upgrade paths for these aircraft (ADS-B and LPV) are available by factory service bulletins, Rockwell Collins STCs or independent third-party STCs.

Baseline avionics suite Current transponder Current GPS Options for ADS-B
Rockwell Collins Proline 21 TDR94D-007 to 409 GPS4000A

Upgrade transponders to TDR94D-501.
Upgrade GPS receiver to GPS4000S  
STC which includes discrete ADS-B failure annunciators
Typical cost:  US $64K.

Alternatives:
Embody Rockwell-Collins STC (May require additional changes to RMU/CDU and IOC). Includes LPV, SVS, IFIS.  Typical costs start at US $150K.

Option for installation of dual Garmin GTX3000 transponders to replace the TDR94D, controlled through the P21 RMU and to use a dedicated Garmin GDL88 GPS receiver.  New Gama STC (ADS-B only – no additional capability). 
Typical cost US $74K (but through-life costs reduced).

Baseline avionics suite Current transponder Current GPS Options for ADS-B
Rockwell Collins Proline II TDR94D-007 to 409 UNS-1K/L/M or Honeywell GNS-X/XLS

Upgrade transponders to TDR94D-501.   STC which includes discrete ADS-B failure annunciators

GPS upgrade options:

  1. Install stand-alone Honeywell KGS-200 or FreeFlight 1203C WAAS GPS only for ADS-B function.

             Typical cost US $78K

  1. If UNS FMS is not already WAAS version, upgrade dual UNS-1K/L to UNS-1()w (this may need new STC which will include LPV capability).

             Typical cost US $160K

  1. No direct WAAS upgrade available from a UNS-1M or GNS-X/GNS-XLS.  In these cases install dual UNS-1()w FMS systems or other stand-alone WAAS GPS such as the FreeFlight 1203C.  New STC may be required

             Typical cost with new dual WAAS FMS: US $200K

Option for installation of dual Garmin GTX3000 transponders to replace the TDR94D, retaining existing controller and to use a dedicated Garmin GDL88 GPS receiver.  New Gama STC (ADS-B only – no additional capability). 

Typical cost US $74K

Honeywell Primus II aircraft will typically have RCZ833 integrated communications units containing the transponder, along with HG2021GD0x GPS receivers. An upgrade programme for the RCZ and the GPS receiver is available via L-3/ACSS (EASA STC pending). Additional options are available to install a stand-alone GPS receiver to meet the ADS-B function only, therefore not affecting the HG2021 GPS and FMS interface.

Baseline avionics suite Current transponder Current GPS Options for ADS-B
Honeywell Primus 11 RCZ833 HG2021GD02 or UNS-1K/L

Upgrade RCZ833 and replace configuration modules.  Replace RM850 radio management units with RM855 if not already done.    Upgrade GPS. 

GPS options:

  1. Install a dedicated Honeywell KGS-200 WAAS GPS receiver for ADS-B.
  2. Upgrade existing HG2021GD02 to GD07
  3. Use existing UNS1()W or upgrade FMS to WAAS version 

Typical costs: US $150K when using stand-alone KGS200 GPS and replacing RM850.

Note:  On some aircraft with NZ2000 FMS, upgrading the NZ2000 software to V6.1 (separate Honeywell or third-party STC) will also enable LPV capability.

Earlier-generation aircraft built with Rockwell Collins EFIS 85/86 or Honeywell EFIS40/50 flight displays and ProLine 11 or Gold Crown radios have many alternate options for Mode S transponders – typically Rockwell Collins TDR94D or Honeywell MST67A. GPS sources include UNS-1E/F/K/L/M FMS systems, UNS-1(x)W WAAS FMS, Honeywell GNS-X/XLS, Bendix-King KLN90B and possibly many more.

Baseline avionics suite Current transponder Current GPS Options for ADS-B
Various MST67A Typically UNS-1K/L/M or Honeywell GNS-X/XLS

Replace MST67A with MST70B.  Do not disturb existing FMS systems.  Install dedicated Honeywell KGS200 WAAS GPS receiver for ADS-B. 

Typical costs: US $110K

Option for installation of dual Garmin GTX3000 transponders to replace the MST76A, retaining existing controller and to use a dedicated Garmin GDL88 GPS receiver.  New Gama STC (ADS-B only – no additional capability). 
Typical cost US $74K

Garmin G1000 GTX33D GIA63W ADS-B solutions are only available from the aircraft type-certificate holder via a manufacturer’s service bulletin.
Hong Kong business jet maintenance. Collaboration formally opens.

Don’t leave it too late

As tempting as it maybe to defer the outlay on an ADS-B Out upgrade you would be wise not to accordign to Harry Lees.

  • check_circle Costs will increase. Already we are seeing MRO’s taking non-refundable deposit payments for shop space. This is just the start of a series of price rises and penalties for those that are comign late to the game.
  • check_circle Parts & fitter shortages. Part of the price rise will simply be down to supply and demand inverting. Qualified avionics engineers will be in short supply as the inevitable rush begins. Parts are already being stockpiled by MRO’s keen to keep an inventory.
  • check_circle Aircraft stuck at airports. Aside of price the real killer is aircraft being grounded. The aircraft will be deemed AOG and will not be allowed to fly until provision for the upgrade is made. This places the owner in the worst possible situation.
  • check_circle It’s OK you’ll sell your aircraft beforehand. With the window closing fast, all brokers are primed to cut the best deals on non-Next Gen compliant aircraft. With values already low, expect a non-compliant aircraft to suffer even further.

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