---
kind: "section"
citation: "14 C.F.R. § 33.53"
title: "14"
number: "33.53"
heading: "Engine system and component tests."
url: "https://uscodex.org/cfr/14/33.53"
---

# §33.53. Engine system and component tests.

- (a) For those systems and components that cannot be adequately substantiated in accordance with endurance testing of [§ 33.49](/cfr/14/33.49.md), the applicant must conduct additional tests to demonstrate that systems or components are able to perform the intended functions in all declared environmental and operating conditions.
- (b) Temperature limits must be established for each component that requires temperature controlling provisions in the aircraft installation to assure satisfactory functioning, reliability, and durability.

## Notes

### Amendments

[Doc. No. 3025, 29 FR 7453, June 10, 1964, as amended by Amdt. 33-26, 73 FR 48285, Aug. 19, 2008]

### Authority

Authority: 49 U.S.C. 106(g), 40113, 44701, 44702, 44704.

### Source

Source: Docket No. 3025, 29 FR 7453, June 10, 1964, unless otherwise noted.

### Amendments

[Doc. No. 3025, 29 FR 7453, June 10, 1964, as amended by Amdt. 33-26, 73 FR 48285, Aug. 19, 2008]