Modificaties Mod.: 16. Supply connection for Oxygen System repositioned Modificaties Mod.: 30. Introduction of positive locking of the controlsticks in the torsion shaft of the control column Modificaties Mod.: 36. Introduction of provisions for adjustment of nosewheel door and outer mainwheel doors Modificaties Mod.: 39. Introduction of a push button switch for closing the sliding hood Modificaties Mod.: 46. Cockpit, oxygen pipe forward of instrument panel repositioned Modificaties Mod.: 69. Jetpipe drainline, intro of a flexible metal hose in lieu of a rubber drain hose between jetpipe and drain-tube Modificaties Mod.: 71. Noodoplossing versterking landingsgestel Tek. Nr. M25; Position Error & Instrument Error. Tailorcraft, Britannia Works, Thurmaston, Leicester Tek. nr. D.233383; G.A. of nose piece. Hawker Aircraft Limited, Kingston-on-Thames Tek. nr. C.177079; G.A. of nose piece. Hawker Aircraft Limited, Kingston-on-Thames Tek. nr. C.225868; wings power controls aileron booster by-pass type introduced (post mod. H.228) Hawker Aircraft Limited, Kingston-on-Thames Tek. nr. D.221580 & D.221581; spare wing (post mod. 228 wing mod. to pre mod. 228 standard). Hawker Aircraft Limited, Kingston-on-Thames