Most of the MROs and engine shops accept engines only on OEM-certified engine stands. One of the possible negative outcomes of using a stand without certification is the damage to an engine, and monetary issues arising from such issues or an MRO or engine shop refusal to accept an engine for planned tasks, that is, loss of slot, are also possible problems. HTF stands for Honeywell Certification, and approval gives operators peace of mind knowing that their valuable asset is being transported in an approved piece of equipment.” HTF stands for only Honeywell Certified and approved engine stands.