Where were the flexible Fibrous Refractory Composite Insulation (FRCI) blankets typically installed on the Shuttle Orbiter?

Answer

On upper fuselage and flight surfaces not exposed to the highest reentry heating.

FRCI blankets provided insulation for areas that experienced less severe heating compared to the leading edges or underbelly, serving as a middle layer of protection.

Where were the flexible Fibrous Refractory Composite Insulation (FRCI) blankets typically installed on the Shuttle Orbiter?
Aerospaceaeronauticsheat shieldthermal protection systemreentry vehicle