We developed each test phase below with a set of checklists specifically designed to be carried out in a systematic sequence with proper attention to detail.
Nondestructive Tests (NDT)
5 Year – We use nondestructive testing methods to detect defects that are sub-surface in nature and not detectable in the visual examination. We record nondestructive tests on the appropriate forms to include pertinent inspection data as required.
Ultrasound Thickness Tests
Aluminum Hardness Tests
This test allows us to determine if the integrity of the aluminum meets NFPA standards.
Magnetic Particle Inspection
Magnetic particle testing is used if a questionable defect is found.
Visual Inspection
Aerials are examined for compliance with the manufacturer’s guidelines, and the National Fire Protection Association standards.
Visual examination of the equipment is intended to detect visible defects damage, or improperly secured parts.
Operational Tests
Annual – These tests are performed to determine whether the hydraulic system, safety systems, and structural mechanism are operating in a normal manner. Placed on a hard-level surface, the aerial apparatus is taken through a sequence of operational cycles. Any abnormal conditions will be noted.
Some areas of inspection are:
- Outriggers and Controls
- Turntables and Controls
- Platforms and Controls
- Ladder Sections Components
- Boom Components
- Complete Hydraulic Systems
- Interlock and Safety Systems
- Emergency Safety Lighting
- Under Chassis
Functional Tests
Annual – These tests are performed to determine the unit’s ability to operate and maintain its designed structural integrity. Measurements taken at critical areas are compared to the manufacturer’s allowable tolerances. All data is documented along with allowable tolerances for quick reference. The ultimate purpose of the data collected is to establish a historical baseline for wear and deterioration. The data will assist in identifying trends that may affect equipment operation.
Tests and measurements include:
- Alignment
- Cylinder Drift
- Level Measurements
- Thickness and Corrosion (NDT)
- Timing Test
- Rotation Bearing Tolerance
- Hydraulic System Analysis
- Hydraulic Oil Analysis
- Backlash
- Weight Tests