Fliegen Works Inc.
Aeronautical Engineers – Portland, OR – USA

Summary:  Design and Manufacturing of redundant servo-tab for installation on DHC-3 Otter for Airworthiness Directive (AD).

Client: VAZAR

Client Request: The DHC-3 Otter had a history of failures in the elevator servo-tab bellcrank.  VAZAR agreed to address this issue on their turbine conversion to increase safety of the aircraft and meet the newer 23.629 requirement of flutter free after a single failure.  Volant Technica was asked to develop the fix for the servo tab.

Project Summary:  Volant Technica, (a precursor company to Fliegen Works,) worked with the FAA to address this service difficulty and produced the design data, developed loads and a structural test proposal, then DER witnessed the structural test.  We also wrote the flight test plan and helped with the issuance of the TIA.  The STC is a method of compliance to AD 2004-05-01.  Fliegen Works currently holds PMA for fabrication of the redundant servo tab. that includes a 2nd control rod and other modification to fix in-service failure problem.

Results: STC SA01059SE was granted to VAZAR (as American Aeromotives) and is licensed to Fliegen Works for European import auto repair under PMA PQ2380NM.

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Summary: Conversion of a CASA C-212 from the passenger only configuration, to a combined passenger and cargo configuration, (Combi).  

 

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Project Name: CASA C-212 Combi Conversion

 

Client:  FS Air Service

 

Client Request: Get an STC to modify the CASA C212 for carrying cargo with passengers in the same cabin with multiple configurations.

 

Project Summary: Fliegen Works Inc. provided a certification plan, compliance checklist, structural substantiation, smoke testing, and DER services in support of an STC project to convert the CASA C-212 aircraft from the original passenger-only or cargo only configurations to a combined passenger and cargo configuration.  The project included a novel approach of using fire containment blankets to segregate the cargo within the passenger compartment using data from the FAA tech center.  This project required the design and installation of new emergency equipment for installation in the cabin as well as a thorough Aircraft Flight Manual Supplement (AFMS). 

Fliegen Works coordinated with the FAA to grant an Exemption to allow the use of building type smoke detectors for fire detection within the fire containment blankets.  This project culminated in TIA for demonstration of smoke detection per 25.857 and ventilation per 25.831.  Fliegen Works built a smoke box per AC 25-9A appendix II, which generates a precise amount of smoke and is available for other projects.

 

Results:  STC ST02257AK approved for change in type design.

 

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CASA C212 Combi Conversion

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