9955 - Note : Helium-3 tube failures are extremely rare. Type Note Helium-3 tube failures are extremely rare. 9949 - Replace Helium-3 tube Replace Helium-3 tube Go to 8823 - 8168 - Did this fix the problem? - Decision, Notes: Note 9950 - If a spare Helium-3 tube is available, perform the following procedure: 9951 - DET-RPM-RAP-CM21, Neutron Detector Helium-3 (He3) Tube Replacement.
9955 - Note : Helium-3 tube failures are extremely rare. Type Note Helium-3 tube failures are extremely rare.
