Modifications incorporated in initial design

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LIST OF MODIFICATIONS - ENGLISH-BUILT DHC-1 CHIPMUNK SERIES

Mod No.	Date of Introduction	Applicability	Modification Title
H.1	Initial Design Record Purposes Only	T Mk10 Mk21	To Introduce Redesigned Fuel Cock and Longer Operating Lever
H.2	Initial Design Record Purposes Only	T Mk10 Mk21	To Introduce Redesigned Oil Tank
H.3	Initial Design Record Purposes Only	T Mk10 Mk21	To Delete Oil Drainage Collector Box and Provide Open Drain
H.4	Initial Design Record Purposes Only	T Mk10 Mk21	To Provide Easy Means of Changing Perspex Panels on Canopy and Windscreen
H.5	Initial Design Record Purposes Only	T Mk10 Mk21	To Provide Inspection Panels at Controls and Pipe Joints
H.6	Initial Design Record Purposes Only	T Mk10 Mk21	To Make Detachable Wing Root End and Tip Ribs to Facilitate Storage and Transport
H.7	Initial Design Record Purposes Only	T Mk10 Mk21	To Reposition Front Rudder Bar, Improve Control Lever and Make Rudder Lower Hinge more Accessible
H.8	Initial Design Record Purposes Only	T Mk10 Mk21	To Enclose Aileron Control Sprocket to Prevent Ingress of Foreign Bodies
H.9	Initial Design Record Purposes Only	T Mk10 Mk21	To Improve Accessibility of Control Box for Inspection Purposes
H.10	Initial Design Record Purposes Only	T Mk10 Mk21	To Provide Phosphor Bronze Bushes for Undercarriage Torque Links
H.11	Initial Design Record Purposes Only	T Mk10 Mk21	To Provide Separate Fluid Reservoir for Wheel Brakes
H.12	Initial Design Record Purposes Only	T Mk10 Mk21	To Introduce of Duplicate Control for VHF
H.13	Initial Design Record Purposes Only	T Mk10 Mk21	To Provide Instrument and Emergency Lighting
H.14	Initial Design Record Purposes Only	T Mk10 Mk21	To Reposition VHF Aerial from Rear Fuselage to Underside of Wing
H.15	Initial Design Record Purposes Only	T Mk10 Mk21	To Shorten the Pitot Head Strut to Prevent Damage
H.16	Initial Design Record Purposes Only	T Mk10 Mk21	To Provide Drainage Facilities for ASI Pressure and Static Lines
H.17	Initial Design Record Purposes Only	T Mk10 Mk21	To Reposition the Compasses to Prevent Interference
H.18	Initial Design Record Purposes Only	T Mk10 Mk21	To Provide Cabin Cooling Facilities
H.19	Initial Design Record Purposes Only	T Mk10 Mk21	To Introduce Generator Failure Warning Lights on Instrument Panel
H.20	Initial Design Record Purposes Only	T Mk10 Mk21	To Provide Ground Equipment Removable Parts
H.21	Initial Design Record Purposes Only	T Mk10 Mk21	To Provide Fixed Parts on Airframe for Ground Equipment
H.22	Initial Design Record Purposes Only	T Mk10 Mk21	To Introduce “Coffman” Cartridge Starter