Cause: Tube not fully bottomed in fitting. Solution: Cut tube, clean, reinstall with depth mark. Inspect fitting for cracks – replace if any.
| Standard | Relationship to AS33514 | |----------|--------------------------| | | Defines the flexible hose end fittings that mate with AS33514 tube fittings. | | SAE-AS33516 | Specifies the port connection (boss) for attaching the fitting to valves, pumps, or manifolds. | | SAE-AS4395 | The older flared fitting standard – not interchangeable with AS33514. | | SAE-AS4059 | Fluid cleanliness level required during assembly (to prevent ferrule damage). | | ISO 8434-3 | International equivalent (metric version) but not identical – do not mix. | sae-as33514
Cause: Differential thermal expansion between ferrule and tube (e.g., steel ferrule on aluminum tube). Solution: Retorque to specification after system reaches equilibrium. Consider using same-material tube and ferrule. Cause: Tube not fully bottomed in fitting
But what exactly is SAE-AS33514? Why is it referenced in countless aircraft blueprints and repair manuals? This article provides a deep dive into the standard—its history, technical requirements, applications, and the critical role it plays in modern aviation. SAE-AS33514 is a formal aerospace standard published by SAE International (formerly the Society of Automotive Engineers). The "AS" prefix denotes Aerospace Standard , distinguishing it from ground vehicle (J) or general industry standards. | | SAE-AS4059 | Fluid cleanliness level required