US 11,655,017 B2
Stiffener skeleton for a firewall arrangement of a rotary wing aircraft
Aurelien Vayssiere, Niederschoenenfeld Ot Feldheim (DE); Nicolas Montil, Saint Chamas (FR); Mathieu Gester, Velaux (FR); Hubert Neukirch, Dillingen (DE); Pascal Jervaise, Gardanne (FR); Markus Kammerer, Alerheim (DE); and Pierre Arnould, Salon de Provence (FR)
Assigned to AIRBUS HELICOPTERS DEUTSCHLAND GMBH, Donauworth (DE); and AIRBUS HELICOPTERS, Marignane (FR)
Filed by AIRBUS HELICOPTERS DEUTSCHLAND GMBH, Donauworth (DE); and AIRBUS HELICOPTERS, Marignane (FR)
Filed on Jun. 17, 2021, as Appl. No. 17/350,438.
Claims priority of application No. 20400021 (EP), filed on Nov. 20, 2020.
Prior Publication US 2022/0161915 A1, May 26, 2022
Int. Cl. B64C 1/06 (2006.01); B64C 27/04 (2006.01)
CPC B64C 1/061 (2013.01) [B64C 27/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A stiffener skeleton that is configured to be mounted to an upper deck of a rotary wing aircraft in a maintenance phase, comprising:
an upper stiffening structure with a plurality of supporting arms for providing upside stiffening support; and
a lateral stiffening structure with a plurality of supporting legs for providing lateral stiffening support;
wherein the plurality of supporting arms and the plurality of supporting legs form a self-supporting frame structure; and
wherein the self-supporting frame structure is configured to be arranged in the maintenance phase on a firewall arrangement provided on an upper deck of a rotary wing aircraft for supporting and stiffening at least a front firewall, a rear firewall, and a mid firewall of the firewall arrangement.