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Part #:

Model: 331A-3G

OEM:

Collins Aerospace

Desc:

HSI
Part Number :


331A-3G

 

FEATURES

  • Course Indicator typically used in PN-101 Pictorial Navigation System
  • Provides controls for course and heading selection
  • Contains outputs for autopilot or flight director, VOR Receiver, and additional compass loads
  • All models contain bootstrap synchro as additional source of slaved gyro heading information (except -000 model)
  • May be front or rear mounted
  • Models available with or without internal lighting (see table below)
  • Internally lighted models available with 5 or 28 Volt, white, blue-white, or red lighting (see table below)
  • Models available w/ EZ/ORZ choke to enable usage w/ 30 or 400Hz OBS resolvers (see table below)
  • Model available with gray face color (all other models black)
  • Similar to 331A-3F indicator but 331A-3G DOES contain course datum, heading, or bootstrap synchros for autopilot tie-in and additional source of slaved gyro heading information

 

SPECIFICATIONS

Dimensions: 3.175"W x 3.175"H x 6.5"L (-005+ versions 6.730"L) Weight: 3.4 lbs.
Altitude: -1000 to 40,000 feet Magnetic Effect: 5 degrees max deflection of 1-1/2 inch bar magnetic at a distance of 12 miles
Power Requirements: 26 volts, 400Hz (also requires 5,28 V for lighting depending on unit) Warmup Time: None required
Part Number: Description:
522-2638-000 No internal lighting, black face, NO course datum synchro
522-2638-001 No internal lighting, black face, with heading, course datum, and bootstrap synchros
522-2638-002 No internal lighting, black face, with heading, course datum, and bootstrap synchros
522-2638-003 No internal lighting, black face, with heading, course datum, and bootstrap synchros, with EZ/ORZ choke
522-2638-005 No internal lighting, black face, with heading, course datum, and bootstrap synchros, with EZ/ORZ choke
522-2638-006 28V blue-white internal lighting, black face, with heading, course datum, and bootstrap synchros, with EZ/ORZ choke
522-2638-007 5V white internal lighting, black face, with heading, course datum, and bootstrap synchros, with EZ/ORZ choke
522-2638-008 5V blue-white internal lighting, gray face, with heading, course datum, and bootstrap synchros, with EZ/ORZ choke
522-2638-009 5V blue-white internal lighting, black face, with heading, course datum, and bootstrap synchros, with EZ/ORZ choke
522-2638-010 28V red internal lighting, black face, with heading, course datum, and bootstrap synchros, with EZ/ORZ choke



PLEASE NOTE: THE ABOVE LISTED PART NUMBERS REFLECT THE DIFFERENT UNITS ORIGINALLY AVAILABLE BY THE MANUFACTURER AND DO NOT NECESSARILY INDICATE OR REFLECT THE CURRENT AVAILBILITY OF THESE DIFFERENT UNITS BY SOUTHEAST AEROSPACE OR THE AFTERMARKET

 

522-2638-006
- HSI

NSN: 5826-01-013-0734

Price Condition Status
$1,250.00 OH OUTRIGHT 1 IN STOCK
522-2638-00
- HSI
Price Condition Status
RFQ RFQ RFQ
522-2638-001
- HSI

NSN: 6610-01-100-8063

Price Condition Status
$1,050.00 SV OUTRIGHT REQUEST LEAD TIME
522-2638-007
- HSI
Price Condition Status
REQUEST OH OUTRIGHT REQUEST LEAD TIME
REQUEST OH EXCHANGE REQUEST LEAD TIME
522-2638-008
- HSI
Price Condition Status
RFQ RFQ RFQ
522-2638-009
- HSI
Price Condition Status
REQUEST OH OUTRIGHT REQUEST LEAD TIME
522-2638-010
- HSI
Price Condition Status
RFQ RFQ RFQ

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

On select DG and HSI instruments, the selected heading is marked by an orange heading bug that can be moved to any point around the perimeter of the compass card. As the aircraft's heading changes, the bug rotates with the compass card altering the pilot to the difference between the selected heading and the actual aircraft heading. The heading bug may also be coupled to the autopilot thus producing off heading signals.

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 75% of the original exchange price. That is, it cannot cost SEA more than 75% 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.


In relation to NE (New) parts, many OEMs change their prices and availability without any notice to dealers or the industry. Therefore, through the REQUEST or RFQ indication, we ask that customers contact us for the most accurate price and availability.

In relation to SV & OH parts, the used parts aftermarket in the aviation industry is not an infinite supply. It is a dynamic, constantly changing market that is significantly affected by and susceptible to highs and lows in supply and demand. Therefore, although we attempt to, at times, we are unable to predict the exact moment when an item may be available. Once again, through the REQUEST or RFQ indication on our website, we ask that customers contact us for the most current and accurate price and availability.