POH scans FG '68 177 '68 177 (mod) '69 177 '69 177 (mod) '70 FG '71 FG '72 FG '73 FG '74 FG '75 FG doc '75 FG '76 FG '77 FG '78 FG RG '71 RG '72 RG '73 RG '74 RG '75 RG '76 RG '77 RG '78 RG Addendums '86 Appendix