Type 3656-A

Safran Helicopter Engine Vibration Kit

Vibration toolkit for field inspection of all helicopter engine families produced by Safran Helicopter Engines.

Richiedi un preventivo

Safran Helicopter Engine Vibration Test Kit Type 3656-A is designed for field inspection of all Safran helicopter engine families. Vibration test measurements are performed according to the respective maintenance manual.

Type 3656-A has been developed by Brüel & Kjær in close collaboration with Safran, a leading helicopter engine manufacturer.

The test kit comprises a vibration meter (with measurement templates for all Safran engines), a high-temperature accelerometer, and a 10 m cable, all packed in a handy shoulder bag.


  • Standard: Vibration check during a run-up from engine START to FLIGHT
  • High N1/NGG rate: Vibration check during a run-up from FLIGHT to the maximum speed of the gas generator reachable on ground (or in flight for Arriel® 1 single-engine helicopters after Deep Maintenance Intervention)


  • Immediate and unambiguous pass/fail decisions according to engine maintenance manual instructions
  • Recording and documentation of test data according to Safran requirements for easy interaction with Safran Services


  • Verifies overall vibration levels in a specific frequency range during engine run-up/high N1-NGG rate against allowable limits
  • Message if level limitations are exceeded
  • Safran templates for all engine families are included Meta-data annotation according to Safran requirements
  • Meta-data annotation according to Safran requirements
  • Designed for one hand operation and simplified operator user-interface
  • Requires only one transducer and one cable
  • No computer required during measurements
  • No tachometer connection required
  • Storage of results with full annotation including the raw signal for post-processing
  • Enhanced diagnostics can be carried out after the test by postprocessing the raw time signal
  • Easy reporting, data transmission and data export to consumer software
  • Long-life rechargeable battery operation (>8 hours)