• 57-6176 US Army # 1849. L-20 No. 850. Command A-14. Delivered 12-Dec-1958. Built as L-20A and re-designated U-6A in 1962. Date terminated Oct-1971.
Note: Served in South Vietanm with 299th Eng Bn, 35th Eng Grp, 18th Eng Brigade, USARV Engineering Command.
Crashed 24 km SW of Phang Rang Air Base 19-Oct-1971: 57-6176 was being flown by (P) 27 yr old 1LT Marshall Williams and (CP) 23 yr old CPT Alan Boone on an administrative mission when they crashed into a mountain 24 km SW of Phang Rang Air Base, Ninh Thuan Province. Inclement weather was given as cause.