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shot in sequence.
NOTE: Films shall overlap to ensure that the whole region of interest is
radiographed. Use lead tapes or high density markers to help film
evaluation.
D. Radiographic pictures shall be taken following the parameters shown in
Table 201.
E. Adjust the mAs to achieve a film density between 1.5 and 2.5.
F. Repeat procedure for all areas requiring inspection.
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Area to be inspected
Figure 201
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Preparation for inspection
Figure 202
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7. EXPOSURE DATA
SETTINGS FILMS
Exposure
Number
kV mAs SFD CLASS SIZE
ALL 50 2800 1500 mm
(59 in.)
2
Type D7
As required
for area
coverage
X-ray parameters for the inspection area
Table 201
CAUTION: PARAMETERS ABOVE ARE FOR THE EQUIPMENT DESCRIBED IN PARAGRAPH 4 AND FOR
A DEVELOPMENT TEMPERATURE OF 33° C (91.4° F). WHEN ADJUSTING OTHER UNIT
OR CONDITIONS DO NOT EXCEED THE GIVEN KV.
NOTE: The mAs quoted is for a minimum SFD of 1500 mm (59 in.). Longer SFD may be
used to inspect a larger area in one shot. In this case the mAs value must
be adjusted in accordance with the inverse square law. (Refer to Chapter
51-20-00, Page Block 201).
8. ACCEPTANCE CRITERIA
CAUTION: WHITE OR LIGHT GREY INDICATIONS MAY ALSO BE CAUSED BY CORE FILLER OR
ADHESIVE. THIS INDICATIONS MUST NOT BE CONFUSED WITH WATER TRAPPED
INDICATIONS. (REFER TO FIGURE 204)
A. Water filled honeycomb cells will show as white or light grey areas on the
film, conforming to the shape of the honeycomb cells. Refer to examples given
on Figures 203 to 205.
NOTE: To determine white or light grey indications as caused by water and core
filler or adhesive, a cell by cell evaluation must be performed.
Usually, cells containing water are all homogeneous, while cells
containing core filler or adhesive have a small spot produced by the
presence of bubbles.
B. Mark the position and size of any water indication located under the lightning
strip.
C. Complete the shape and size of the thermographic indications with the ones
obtained by X-ray. (Refer to Figure 205)
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9. FINAL NDT REQUIREMENTS
A. Remove all test equipment.
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Example of radiograph image where the beam of radiation
is not perpendicular to the honeycomb cell orientation
Figure 203
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Example of radiograph image of an area with core filler
Figure 204
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Example of Thermographic and X-Ray indication marking
Figure 205
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PART 10 - THERMOGRAPHIC
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1. COMPONENT OR AREA TO BE INSPECTED (Refer to Figure 1001)
A. The honeycomb structure of both the upper and lower elevator panels, LH/RH.
2. DESCRIPTION OF POSSIBLE DAMAGE
A. Honeycomb cells containing more than 10% of trapped water in areas equal to or
more than 120 mm² (0.186 in²) in size.
3. RELATED DOCUMENTS
A. NTM, Chapter 51-10-03, Page Block 501, Resonance Frequency, Inspection of CFRP
and GFRP. Composite Components - Honeycomb Sandwich Parts
B. NTM, Chapter 51-10-90, Page Block 1001, Thermography - General
C. AMM, Chapter 27-34-41, Page Block 401, Elevator - Removal/Installation
4. EQUIPMENT AND MATERIALS
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