Aircraft Products

Aircraft Modifications For Payload Increases

RWMI DHC-6-200HG Aircraft Modifications For Payload Increase


OPERATIONS TO 12,500 lbs. (5670 Kg)

The DHC-6-200HG® enhances the DHC-6-100 & DHC-6-200 Twin Otter capabilities by increasing the maximum takeoff weight (MTOW) from 11,579 pounds (5252 Kg) to 12,500 pounds (5670 Kg). This modification effectively upgrades the Twin Otter series -200 to match or out-perform a Twin Otter DHC-6-300 series. This is due to the fact that early model Twin Otters are typically hundreds of pounds lighter than later model -300 series Twin Otters. The Federal Aviation Administration (FAA), Transport Canada and EASA approve this upgrade for Standard Category operations. This modification can also be applied to DHC-6-100 aircraft with some additional modifications. Contact IKHANA for available DHC-6-200HG® aircraft.



OPERATIONS TO 14,000 lbs. (6350 Kg)

The DHC-6-300RG® and DHC-6-400RG® upgrade is a Restricted Category Supplemental Type Certificate (STC) authorizing the operation of DHC-6-300 and DHC-6-400 Twin Otter aircraft to a maximum takeoff weight (MTOW) of 14,000 pounds (6350 Kg). The -300RG and -400RG are Federal Aviation Administration (FAA) and Transport Canada approved. Dual use multiple airworthiness certificates in Standard and Restricted Categories are authorized. The approved Restricted Category purposes include:

  • Forest and wildlife conservation
  • Aerial surveying
  • Patrolling
  • Weather Control
  • Carriage of Cargo
  • Search and Rescue
Aircraft New Product Development, Aircraft Modifications For Payload Increase
RWMI DHC-6-300HG, Aircraft Modifications For Payload Increase


OPERATIONS TO 14,000 lbs. (6350 Kg)

The DHC-6-300HG® Standard Commuter Category STC will authorize the -300 Twin Otter to Operate up to 14,000 pounds (6350 Kg) under a Standard Airworthiness Certificate. This modification is now FAA approved other approvals are being pursued.

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