TRIPLE RPM INDICATOR (P/N dl404-39) - New Surplus, As Removed
P/N: dl404-39
Category: Indicators
This product requires a custom quote. Please contact our sales team for pricing information or submit an RFQ (Request for Quote).
Available Inventory
| Condition | Stock |
|---|---|
| New Surplus | 1 Available |
| As Removed | 1 Available |
Product Description
The dl404-39 is a triple RPM indicator for helicopter flight decks, displaying three independent rotational speed signals on a single instrument. It shows rotor NR alongside two engine N2/Np channels, allowing pilots to monitor all critical drivetrain speeds simultaneously. This electric tachometer conforms to FAA TSO-C49b standards and interfaces with tach generators or electronic speed sensors.
Installation requires calibration per aircraft maintenance manual and applicable certification data. Typical helicopter installations use this indicator for real-time engine and rotor performance monitoring during all flight phases.
Please note: Product descriptions are provided for informational purposes. Always refer to your aircraft's Illustrated Parts Catalog (IPC) to verify part compatibility and specifications.
Frequently Asked Questions
What is the TRIPLE RPM INDICATOR (P/N dl404-39)?
The dl404-39 is a triple RPM indicator for helicopter flight decks, displaying three independent rotational speed signals on a single instrument. It shows rotor NR alongside two engine N2/Np channels, allowing pilots to monitor all critical drivetrain speeds simultaneously.
Is the dl404-39 calibrated and ready to install?
Calibration status depends on the condition. Overhauled instruments come fully calibrated with an 8130-3 tag. The TRIPLE RPM INDICATOR is available in: New Surplus, As Removed. Contact us to confirm calibration status for your selected condition.
Can the dl404-39 be used as a direct replacement in my aircraft?
The TRIPLE RPM INDICATOR is designed as a form-fit-function replacement. Verify the part number against your aircraft's Illustrated Parts Catalog (IPC) and instrument panel layout to confirm compatibility before ordering.
Do you offer instrument exchange programs for the dl404-39?
Yes, we offer core exchange programs on select instruments. Send your unserviceable unit and receive a discount on the replacement. Call (904) 998-9101 or submit an RFQ to check exchange availability for the dl404-39.
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