Rationale:Upon performing a five year review of ARP4150, it was decided that the document should be updated. This review revealed that an earlier version of this information was available in AIR4150. It was determined that when ARP4150 was produced all the important information from AIR4150 was included. It appears that AIR4150 was forgotten about. During the SAE meeting committee A-6A1 voted to cancel AIR 4150 as being superseded by ARP4150.