SR02599SE
Installation of a Kawak Aviation Technologies Model 41300 auxiliary hydraulic system. Held by Kawak Aviation Technologies, INC.. Last revised March 30, 2026. System: heating, ice protection and utility systems.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Billings Flying Service Inc; Billings Flying Service, Inc.; Billings Flying Service Inc.; Columbia Helicopters Inc.; Unical Air Inc.; Tandem Rotor LLC
- Models
- CH-47D, CH-47D, CH-47D, CH-47D, CH-47D, CH-47D
- Type certificates
- R0011DE, R0015DE, R00115SE, R00051SE, R00024LA, R0014DE
- On this site
- Billings Flying Service Inc CH-47 6 registered
Tandem Rotor Llc CH47 5 registered - The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 20, 2026.