Part #:

Model: EFD-74


Collins Aerospace


Electronic HSI

Part Number :

  • Electronic flight display used in EHSI-74 Electronic HSI System
  • Single cathode-ray tube (CRT), high-resolution, black matrix, shadow mask color display
  • Horizontal and vertical deflection amplifiers
  • Contains high-voltage power supply and video and deflection power supplies
  • Black and gray front bezel available (see table below)
Env. Categories: A2C1/B/PKS/XXXXXXA/BZ/AZA Size: 4.175"W x 4.175"H x 9.60"L
Weight: 4.9 lbs. Mounting: Panel mounting, 4 ATI
Temperature: -20 to +70C Altitude: up to 35000 ft.
Power Requirements: 27.5 VDC, 0.95A (typical)    
Part NumberElectronic Flight Display Description:
622-6197-001 features as above with black bezel
622-6197-002 features as above with gray bezel


- Electronic HSI

NSN: 6610-01-322-0566

Price Condition Status
- Electronic HSI
Price Condition Status

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

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.

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.

Most original EFIS tubes include older tube technology with a high voltage power supply (HVPS) that heats a CRT (cathode ray tube). Because units with CRTs can operate at high voltages they can be susceptible to significant failure. When failures in the power supply occur, they usually must be replaced. The failure can lead to problems in the CRT assembly itself as well. In most cases it is most cost effective to replace the unit with another serviceable unit when either the CRT or HVPS fail. In addition, the CRT is subject to screen burn in and needs to be replaced in order to be certified for use on an aircraft. Most manufacturers allow around 25% burn in before the CRT must be replaced.