Part #:

Model: 328A-3G

Collins Aerospace - Slaving Amp
Part Number :

  • Slaving Accessory used in PN-101 Pictorial Navigation System
  • Removes error from directional gyro input that may be exist between direction of earth's magnetic field sensed by 323A-2G/3G Flux Detector and magnetic heading presented on 331A-3G Course Indicator
  • Contains servo amplifier for 331A-3G servo motor
  • Model available that contains signal buffer to drive a compass slaving meter (see table below)
Dimensions: 2.375"W x 3.312"H x 14.031"L Weight: 3.7 lbs.
Inputs: 3-wire ARINC synchro transmitter input. 27.5 volt dc power input. 2-wire 323A-3G error signal. Synchro error and motor-generator rate signal Outputs: 3-wire ARINC magnetic compass output; 400Hz ac output; servo-amplifier output; 323A-3G excitation; power failure warning; fast slave signal
Power Variation: Will function properly with a +-15 percent variation in dc voltage Audible Noise: None
Temperature Range: -55 to +70C (operating) Altitude: -1000 to 40000 feet
Magnetic Effect: Less than 5 deg. deflection of a 1-1/2 inch bar magnet at a distance of 2 inches Accuracy: Provides a slaving accuracy of +-2 degrees for the system
Sensitivity: Provides slaving correction when a +-0.5 degree error is introduced Slow Slave Speed: Nominal slow-slave speed is 3 degrees/min rotation
Fast Slave Speed: Nominal fast-slave speed is 300 degrees/min rotation    
Part NumberSlaving Accessory Description:
522-2644-011 Standard version with features as listed above
522-2644-013 Same as -011 but contains signal buffer as described above


- Slaving Amp

NSN: 6605-01-360-2983

Price Condition Delivery

SEA Repair Capabilities: Yes

- Slaving Accessory
Price Condition Delivery

SEA Repair Capabilities: No

- Slaving Accessory
Price Condition Delivery

SEA Repair Capabilities: Yes

- Slaving Accessory/Amp
Price Condition Delivery

SEA Repair Capabilities: Yes

Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact

Southeast Aerospace exchanges are based on the return of an undamaged, economically repairable core unit with identical part number as the unit shipped to the customer. An "economically repairable" core is defined as one where the cost to repair/overhaul (or Repair Cap) does not exceed 80% of the original SV/OH exchange price billed. Should the Repair Cap exceed 80%, the customer will be billed the additional amount. In the event this amount exceeds the Outright Price for the unit, the customer would only be billed the difference between the Outright Price and SV/OH Exchange Price with the core returned as-is to the customer.

Here is an example of such a transaction:

$1000 Exchange Price charged to customer
$1000 x .8 = $800 Maximum Allowable core repair charge or Repair Cap

$2000 Cost to repair core unit
- $800 Less Core repair cap
$1200 Additional billing amount.

2200.00 Total Cost of transaction

Please Note:
SEA offers exchange on new items as well. However, repair cap as indicated above is still based on SV/OH exchange price.

Negotiating the exchange price of a unit only limits the allowable repair cap for the core unit. Southeast Aerospace's exchange transactions are based on the return of economically repairable core unit. Once the core is received and evaluated, the core repair cost incurred by SEA cannot exceed 80% of the original exchange price. That is, it cannot cost SEA more than 80% of the original OH/SV exchange price collected from the customer. Therefore, when and if an SEA exchange price is discounted, there is a risk that additional charges may be assessed once the core is returned and evaluated.

For more information, please refer to these other Exchange FAQs

Most of the Collins Proline I components were originally manufactured in the early 1970s. Collins has continued to produce some of the Proline I components by special order over the past 30 years however large scale production stopped many years ago. Most of the Collins Proline I product lines incorporates 1960s and 70s analog technology. Collins has superseded the Proline I product line several times with the Proline II, Proline IV, and Proline 21 lines. As a result, some service parts needed to maintain and repair original Collins Proline I components are no longer available. Therefore, you may experience limited to no warranty available and unreliability for many of the Proline I units.

Southeast Aerospace offers many affordable, upgradeable options that are available for aircraft with Collins Proline I. As avionics integration specialists and premiere Collins dealer, Southeast Aerospace is experienced and knowledgeable on all Collins Proline generations.

If you are interested in upgrading any of your original Collins Proline I systems, please contact us for the most reasonable, optimal choice available.