Missing DC-9 Series 30 versionsDC-9-32: Introduced in the first year (1967). Certificated March 1, 1967. Basic MTOW of 108,000 lb (49,000 kg) later increased to 110,000 lb (50,000 kg). A number of cargo versions of the Series 32 were also produced:
32LWF (Light Weight Freight) with modified cabin but no cargo door or reinforced floor, intended for package freighter use.
32CF (Convertible Freighter), with a reinforced floor but retaining passenger facilities
32AF (All Freight), a windowless all-cargo aircraft.
DC-9-33: Following the Series 31 and 32 came the Series 33 for passenger/cargo or all-cargo use. Certificated on April 15, 1968, the aircraft's MTOW was 114,000 lb (52,000 kg), MLW to 102,000 lb (46,000 kg) and MZFW to 95,500 lb (43,300 kg). JT8D-9 or -11 (15,000 lbf (67 kN) thrust) engines were used. Wing incidence was increased 1.25 degrees to reduce cruise drag.[19] Only 22 were built
33CF Convertible Freight (CF)
33RC Rapid Change (RC) aircraft.
DC-9-34: The last variant was the Series 34, intended for longer range with an MTOW of 121,000 lb (55,000 kg), an MLW of 110,000 lb (50,000 kg) and an MZFW of 98,000 lb (44,000 kg). The
DC-9-34CF (Convertible Freighter) was certificated April 20, 1976, while the passenger followed on November 3, 1976. The aircraft has the more powerful JT8D-9s with the -15 and -17 engines as an option. It had the wing incidence change introduced on the DC-9-33. Twelve were built, five as convertible freighters.
34CF(Convertible Freighter)
34AF(All Freight) -> see below (conversion)
https://www.airteamimages.com/mcdonnell-douglas-dc-9_5Y-UAE_astral-aviation_185856.htmlSeries 30 features
The DC-9-30 was offered with a selection of variants of JT8D including the -1, -7, -9, -11, -15. and -17. The most common on the Series 31 is the JT8D-7 (14,000 lbf (62 kN) thrust), although it was also available with the −9 and -17 engines. On the Series 32 the JT8D-9 (14,500 lbf (64 kN) thrust) was standard, with the -11 also offered. The Series 33 was offered with the JT8D-9 or -11 (15,000 lbf (67 kN) thrust) engines and the heavyweight -34 with the JT8D-9, -15 (15,000 lbf (67 kN) thrust) or -17 (16,000 lbf (71 kN) thrust) engines.