Section 33.64 - Pressurized engine static parts(a) Strength. The applicant must establish by test, validated analysis, or a combination of both, that all static parts subject to significant gas or liquid pressure loads for a stabilized period of one minute will not: (1) Exhibit permanent distortion beyond serviceable limits or exhibit leakage that could create a hazardous condition when subjected to the greater of the following pressures: (i) 1.1 times the maximum working pressure;(ii) 1.33 times the normal working pressure; or(iii) 35 kPa (5 p.s.i.) above the normal working pressure.(2) Exhibit fracture or burst when subjected to the greater of the following pressures:(i) 1.15 times the maximum possible pressure;(ii) 1.5 times the maximum working pressure; or(iii) 35 kPa (5 p.s.i.) above the maximum possible pressure.(b) Compliance with this section must take into account:(1) The operating temperature of the part;(2) Any other significant static loads in addition to pressure loads;(3) Minimum properties representative of both the material and the processes used in the construction of the part; and(4) Any adverse geometry conditions allowed by the type design.Amdt. 33-27; 73 FR 55437 , Sept. 25, 2008; Amdt. 33-27, 73 FR 57235 , Oct. 2, 2008 , 73 FR 57235 , 10/2/2008