Wing Phase Array

@A318/A319/A320/A321NONDESTRUCTIVE TESTING MANUAL

Procedures

** On A/C ALL

Task 57-29-07-270-801-A-01Inspection of Upper Wing Skin between Trailing Edge and the Forward Fastener Row of the Rear and False Rear Spar

1. Task Supporting Data

A. Area of ApplicabilityWing Top Skin panel Trailing Edge in the following areas:- Area A (See FIGURE 57-29-07-991-001-A, Sheet 1)

Between the Trailing edge and the forward fastener row of the Rear Spar in Rib Bay 3-4 and Rib Bays9-10 thru 26-27

- Area B (See FIGURE 57-29-07-991-001-A, Sheet 2)Between the Trailing edge and the forward fastener row of the False Rear Spar

- Area C (See FIGURE 57-29-07-991-001-A, Sheet 3)Between the forward fastener row and aft fastener row of the Rear Spar in Rib Bays 4-5 and 5-6.

B. Description of Possible DamageCorrosion, that initiates at the edge of the Wing Top Skin and/or around the Rear Spar bolting, whichpenetrates the lower surface 10% of the material thickness with a 10 mm (0.394 in) diameter.

C. Reason for the JobISB A320-57-1154ISB A320-57-1155

D. Job Set-Up Information

(1) Tooling :

REFERENCE DESIGNATION

99D57204164000 REFERENCE BLOCK

AWP05-64-08-050 PROBE

OMNIPPA16128 ULTRASONIC EQUIPMENT OMNISCAN MX PAUT16-128/U8100029

(2) References :

SRM 51-75-11PB001SRM 57-21-11PB001ISB A320-57-1154ISB A320-57-1155FIGURE 57-29-07-991-001-A - Inspection Area A and Possible DamageFIGURE 57-29-07-991-002-A - Phased Array Rapid Scan AWP05-64-08-050FIGURE 57-29-07-991-003-A - Reference Block 99D57204164000FIGURE 57-29-07-991-004-A - Inspection Area A Scan PathsFIGURE 57-29-07-991-005-A - Inspection Area B Scan PathsFIGURE 57-29-07-991-006-A - Inspection Area C Scan PathsFIGURE 57-29-07-991-007-A - Screen Display Gate LocationsFIGURE 57-29-07-991-008-A - Calibration Screen Display for A-Scan, C-Scan A% (Amplitude Scan)and C-Scan A-I (Thickness Scan)FIGURE 57-29-07-991-009-A - Typical Tapered Skin Display ScreenFIGURE 57-29-07-991-010-A - Typical Skin Pocket Display Screen - Rib Bay 19-20 and 20-21FIGURE 57-29-07-991-011-A - Examples of Signal Loss caused by Skin Pockets, Tapered Skins andSteep Ramped Skin AreasFIGURE 57-29-07-991-012-A - Typical Skin Corrosion Display Screen

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Revision n: 86


2. Procedure

Subtask 57-29-07-271-001-A

A. Preparation for Inspection

(1) Any paint layer on the scan surfaces need not be removed provided it is in good condition with nobubbles or flakes. If there is any doubt about the condition of a paint layer in the scan areas, the paintlayer (excluding primer) must be removed using an approved method. (See SRM 51-75-11PB001)

(2) Make sure that all decals or other adhered substances are removed from the inspection area.

(3) Make sure that the inspection area is free from any visible damage or discontinuities.

(4) Use an approved marker to mark the centre line of Wing Ribs and Rear Spar.

(5) Identify the interface of Wing Ribs and Rear Spar to allow Rib Bay identification.

(6) Inspection Area A. (See FIGURE 57-29-07-991-004-A)

(a) Identify the Rib Bay to be inspected.

(b) Locate the first row of fasteners forward of the Rear Spar interface and identify the first and lastfastener in the row.

(c) Measure 20 mm (0.787 in) from the forward edge of the first fastener head of the fastener rowand mark the position with an approved marker.

(d) Measure 20 mm (0.787 in) from the forward edge of the last fastener head of the fastener rowand mark the position with an approved marker.

(e) Using a straight edge and an approved marker, draw a line between the marked positions Rib toRib.

(f) Measure 40 mm (1.575 in) scan pitch intervals aft from the marked line in LIST STRUCTUREtowards trailing edge of the skin. Using an approved marker mark the remaining scan paths.Make sure that the final scan path overlaps the trailing skin edge.

(g) Repeat steps LIST STRUCTURE thru or LIST STRUCTURE for each Rib Bay to be inspectedwithin Area A.

(7) Inspection Area B. (See FIGURE 57-29-07-991-005-A)

(a) Identify the False Rear Spar.

(b) Locate the first row of fasteners forward of the False Rear Spar and identify the first and lastfastener in the row.



(e) Using a straight edge and an approved marker, draw a line between the marked positions.

(f) Measure 40 mm (1.575 in) scan pitch intervals aft from the marked line in LIST STRUCTURE tothe trailing edge of the skin. Using an approved marker mark the remaining scan paths. Makesure that the final scan path overlaps the trailing skin edge.

(g) Repeat steps LIST STRUCTURE thru or LIST STRUCTURE for the complete False Rear Sparinterface.

(8) Identify Inspection Area C. (See FIGURE 57-29-07-991-006-A)

(a) Identify the Rib Bay to be inspected.

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(b) Locate the first row of fasteners forward of the Rear Spar interface and identify the first and lastfastener in the row.



(e) Using a straight edge and an approved marker, draw a line between the marked positions.

(f) Measure 40 mm (1.575 in) scan pitch intervals aft from the marked line in LIST STRUCTUREuntil the last scan path is at least 20 mm (0.787 in) aft from the aft row of fasteners on the RearSpar. Using an approved marker mark the remaining scan paths.

(g) Repeat steps LIST STRUCTURE thru or LIST STRUCTURE for each Rib Bay to be inspectedwithin Area C.

Subtask 57-29-07-272-001-A

B. Instrument Adjustment

(1) The equipment used in the development of this procedure is shown in TABLE 1.

Item Equipment

Instrument ULTRASONIC EQUIPMENT OMNISCAN MXPAUT16-128/U8100029 (OMNIPPA16128) with softwareversion MXU 2.0 R7 or higher

Probe PROBE (AWP05-64-08-050), 5MHz Phased Array RapidScan, 50 mm (1.969 in) wheel probe, 64 elements, 0.8element pitch, 5 m (16.40 ft) connection cable (SeeFIGURE 57-29-07-991-002-A)

Reference Block REFERENCE BLOCK (99D57204164000) (See FIGURE57-29-07-991-003-A)

Inspection Software CD Rom CD Rom NTMSA572907WPXXX supplied withAWP05-64-08-050 contains the OMNIPPA16128 softwarefile

Probe Guide Spirit Level 1 m (3.28 ft)

Couplant Water Spray

Measure Aid Tape Measure

Approved Marker EDDING 8404

Equipment and Materials

TABLE 1

NOTE : Any comparable ultrasonic instrument may be used provided that it satisfies the requirements ofthis procedure and is capable of resolving the reference defect in the reference block at therequired level of sensitivity.

NOTE : A PC that has a CD reader and a USB1 port will be required to load the files from PROBE(AWP05-64-08-050) CD Rom. ULTRASONIC EQUIPMENT OMNISCAN MXPAUT16-128/U8100029 (OMNIPPA16128) is fitted with a SD Card reader with USB1connector. The SD Card is located in ULTRASONIC EQUIPMENT OMNISCAN MXPAUT16-128/U8100029 (OMNIPPA16128).

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Revision n: 86


NOTE : The use of USB mouse improves the navigation of the ULTRASONIC EQUIPMENTOMNISCAN MX PAUT16-128/U8100029 (OMNIPPA16128) menu.

NOTE : CD Rom NTMSA572907WPXXX is supplied with PROBE (AWP05-64-08-050) when loanedfrom AIRBUS. If you do not have the CD Rom all of the required parameters contained withinthe procedure can be manually inputted. (See TABLE 3)

NOTE : Acquisition Module is only required if the operators own OMNISCAN has a different modulefitted.

(2) Connect the PROBE (AWP05-64-08-050) and Encoder connector to the ULTRASONIC EQUIPMENTOMNISCAN MX PAUT16-128/U8100029 (OMNIPPA16128).

(3) Connect the USB mouse if available.

(4) Preload SD Card with the files from CD ROM NTMSA572907WPXXX. Using ULTRASONICEQUIPMENT OMNISCAN MX PAUT16-128/U8100029 (OMNIPPA16128) SD Card Reader connectedvia a USB1 port to a PC with CD reader.

(5) Insert the flash card into the ULTRASONIC EQUIPMENT OMNISCAN MX PAUT16-128/U8100029(OMNIPPA16128).

(6) Make sure the PROBE (AWP05-64-08-050) wheel is full of water.

(7) Make sure that no air bubbles are present within the wheel water path.

(8) Tighten the adjusting nut on the PROBE (AWP05-64-08-050) wheel until the nut is approximately 3mm (0.118 in) from the end of the thread. (See FIGURE 57-29-07-991-002-A)

(9) Calibrate the Instrument in accordance manufacturers instructions and TABLE 2.

DESCRIPTION F1 KEY MENU F2 -- F6 KEYS SUBMENU

F7 -- F12 KEYSPARAMETER

INPUT VALUE

File File Open Setup >NTMSA572907.ops

Preferences Pref Units Millimeters

Display Selection Display A-C-[C]

Display Selection C-Scan 1 A %

Display Selection C-Scan 2 Thickness

Display Color Select Amplitude

Display Color Load Listed Files >ONDT_RFTOFD.pal

Display Color Start (%) 0

Display Color End (%) 100

Display Color Select Depth

Display Color Load PALSA572907.pal

Measurements Reading List 1

Measurements Reading Group Custom

Measurements Reading Field 1 A %

Measurements Reading Field 2 T (A - I)

Measurements Reading Field 3 None

General Settings

Measurements Reading Field 4 None

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Probe/ part Select Select Select Tx/Rx

Probe/ part Select Probe User>NDTS_5MHZ_WHEEL

Probe/ part Select Wedge User > Wheel

Probe/ part Select Auto Detect Off

Probe/ part Parts Geometry Plate

Probe/ part Parts Thickness (mm) 20

Probe/ part Parts Material Aluminium

Probe/ part Position Scan Offset (mm) 0.00

Probe / WedgeSettings

Probe/ part Position Skew (deg) 90.0

Focal Law Configuration Law Configuration Linear

Focal Law Aperture Elements Qty 8

Focal Law Aperture First Element 1

Focal Law Aperture Last Element 64

Focal Law Aperture Element Step 1

Focal Law Aperture Wave Type LW

Focal Law Beam Min Angle 0.0

Sector Scan settings

Focal Law Beam Focus Depth 50

UT Settings General Gain (dB) 15.0

UT Settings General Wedge Delay (s) 0.00

UT Settings General Velocity (m/s) 6300

UT Settings Pulser Tx/Rx Mode PE

UT Settings Pulser Voltage (V) 40

UT Settings Pulser PW (ns) Auto

UT Settings Pulser Max PRF Optimum

UT Settings Pulser Pulser 1

UT Settings Receiver Filter None

UT Settings Receiver Rectifier FW

UT Settings Receiver Video Filter Off

UT Settings Receiver Averaging 1

UT Settings Receiver Reject (%) 0

UT Settings

UT Settings Beam Beam Delay (s) 25.91 (orapproximate)

Initial Setup Settings

TABLE 2

(10) Set the instrument in accordance with CD Rom NTMSA572907WPXXX or TABLE 3.



INPUT VALUE

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Scan Encoder Type Quad

Scan Encoder Origin 0.0

Scan Inspection Type One-Line Scan

Scan Inspection Scan Encoder 1

Scan Inspection Max. Scan Speed(mm/s)

84.00 (orapproximate)

Scan Area Scan Start (mm) 0.00

Scan Area Scan End (mm) 200

Scan Area Scan Resolution (mm) 0.80 (or approximate)

Encoder Settings

Scan Area Encoder Tolerance(mm)

0.00

Encoder Settings

TABLE 3

(11) Calibrate the Encoder.

(a) Open the WIZARD function and select an Encoder Type Calibration. (See TABLE 4)



INPUT VALUE

Wizard Calibration Type EncoderEncoder Calibration

Wizard Calibration Select Calibration Start

Encoder Calibration 1

TABLE 4

(b) Select a INPUT VALUE start position Origin of 0.00 mm. (See TABLE 5)



INPUT VALUE

N/A N/A Origin (mm) 0.00Encoder Calibration

N/A N/A Set Origin Next


TABLE 5

(c) Select a INPUT VALUE of 50.00 mm. Rotate the wheel 50 mm (1.969 in) in the scanningdirection with the aid of a tape measure and select Calibrate. (See TABLE 6)



INPUT VALUE

N/A N/A Distance (mm) 50.00Encoder Calibration

N/A N/A Set Distance Calibrate


TABLE 6

(d) Rotate the wheel 50 mm (1.969 in) back to the start position of the scan and observe the upper

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Revision n: 86


left of the screen and make sure the Calibrated Axis (X) returns to 0.00 mm. (See TABLE 7)



INPUT VALUE

Encoder Calibration N/A N/A Accept Accept


TABLE 7

(e) If INPUT VALUE is:- Acceptable select ACCEPT- Unacceptable repeat steps LIST STRUCTURE thru or LIST STRUCTURE.

(12) Set the Interface Gate location.

(a) Put the PROBE (AWP05-64-08-050) on a flat surface.

(b) Set the Range to 31.5 mm (or approximate). (See TABLE 8)



INPUT VALUE

Adjust A-Scan Display UT Settings General Range 31.5 mm (orapproximate)

A-Scan Range Settings

TABLE 8

(c) Apply hand pressure on the PROBE (AWP05-64-08-050) handle until the spring resistance is metand the PROBE (AWP05-64-08-050) wheel is in contact with the flat surface.

(d) Set the A-Scan Interface Signal start position in accordance with TABLE 9 and FIGURE57-29-07-991-007-A, Screen Display A.



INPUT VALUE

Adjust A-Scan Display UT Settings General Start

A-Scan Start Settings

TABLE 9

(e) Set the Interface Gate start position in accordance with TABLE 10 and FIGURE57-29-07-991-007-A, Screen Display A.



INPUT VALUE

Gate/Alarm Gate Gate I

Gate/Alarm Gate Parameters Position

Alter Interface Gate

Gate/Alarm Gate Start

Interface Gate Start Settings

TABLE 10

(f) Release hand pressure from the PROBE (AWP05-64-08-050) handle.

(g) Adjust the Interface Gate width to cover this signal in accordance with TABLE 11 and FIGURE

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57-29-07-991-007-A, Screen Display B.



INPUT VALUE




Gate/Alarm Gate Width

Interface Gate Width Settings

TABLE 11

(h) Adjust the Interface Gate threshold to 20% Full Screen Height (FSH). (Refer to TABLE 12)



INPUT VALUE




Gate/Alarm Gate Threshold 20

Interface Gate Threshold Settings

TABLE 12

(13) Select REFERENCE BLOCK (99D57204164000).

(14) Do a Zero-Degree Sensitivity Calibration away from spotfaces in accordance with the manufacturersinstructions with a Reference Amplitude of 80% FSH.

NOTE : During the Zero-Degree Sensitivity Calibration it is possible to identify any failing elementswithin the array.

(15) Do a TCG Calibration away from the spotfaces in accordance with manufacturers instructions on steps1, 2 and 3 of the REFERENCE BLOCK (99D57204164000) with a Reference Amplitude of 80% 5%.

(16) Set Gate A to a start position of 2 mm (or approximate) with a width of 20 mm and a threshold of25% FSH. (See TABLE 13)



INPUT VALUE

Gate/Alarm Gate Gate A


Gate/Alarm Gate Start 2 (or approximate)

Gate/Alarm Gate Width 20

Gate Settings

Gate/Alarm Gate Threshold (%) 25

Gate A Settings

TABLE 13

(17) Put the PROBE (AWP05-64-08-050) away from spotfaces on Step 1 of REFERENCE BLOCK(99D57204164000) and apply hand pressure on the PROBE (AWP05-64-08-050) handle until the springresistance is met and establish a Back Wall Echo (BWE). Adjust the Gain to 80% FSH. (See TABLE

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14)



INPUT VALUE

UT Settings UT Settings General Gain (dB)

Gain Settings

TABLE 14

(18) Do a scan over the spotfaces on the REFERENCE BLOCK (99D57204164000). When the scan iscomplete Pause the Screen Display. (See TABLE 15)



INPUT VALUE

Starting the Scan Scan Start Start N/A

Pausing the Scan Scan Start Pause N/A

Starting and Pausing the Scan

TABLE 15

(19) Enter the thickness of the Step. (See TABLE 16)

DESCRIPTION F1 KEY MENU KEYS F7 -- F12 KEYSPARAMETER

INPUT VALUE

Measurements Thickness Source A - I

Measurements Thickness Min (mm) 0.05

Measurements Thickness Max (mm) (Enter ReferenceStandard StepThickness)

General Settings

Measurements Thickness Echo Qty 1

Thickness Measurement Settings

TABLE 16

(20) Make sure that both spotfaces are clearly displayed on both uncorrected C-Scan displays. (See FIGURE57-29-07-991-008-A)

(a) If spotfaces:- Cannot be displayed clearly check that max thickness reading is correct in accordance with

TABLE 16- Still cannot be clearly displayed repeat steps LIST STRUCTURE thru or LIST STRUCTURE.

(21) Turn off the Screen Display Pause. (See TABLE 17)


INPUT VALUE

Turn Pause Off Scan Start Pause N/A

Pause Settings

TABLE 17

(22) Put the PROBE (AWP05-64-08-050) away from spotfaces on Steps 2 and 3 of REFERENCE BLOCK

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(99D57204164000) and repeat steps LIST STRUCTURE thru or LIST STRUCTURE.

(23) Save the calibration file on the unit with a relevant filename. (See TABLE 18)


INPUT VALUE

Save Calibration Setupfile

File File Save Setup As File Name:Calibration_Setup

Save Calibration Setup File

TABLE 18

Subtask 57-29-07-273-001-A

C. Inspection

CAUTION : YOU MUST BE AWARE OF THE STRUCTURE CONFIGURATION IN THE INSPECTIONAREAS, INSPECTION AREAS WILL CONTAIN SKIN THICKNESS CHANGES, SKIN POCKETS,TAPERED SKINS AND RADII. STRUCTURAL CHANGES WILL AFFECT THE INSPECTIONAND SCREEN DISPLAYS. (SEE SRM 57-21-11PB001, FIGURE 57-29-09-010, FIGURE57-29-09-011 AND FIGURE 57-29-09-012).

(1) Open the Calibration Setup File. (See TABLE 19)



INPUT VALUE

Save Calibration Setupfile

File File Open Open:Calibration_Setup

Open Calibration Setup File

TABLE 19

(2) Identify the inspection area.

(3) Measure the scan path distance of the inspection area and enter the scan path length + 50 mm inaccordance with TABLE 20.



INPUT VALUE

Enter Scan PathLength

Scan Area Scan End (mm) (Scan Path Distance+ 50 mm)

Enter Scan Path Length

TABLE 20

(4) Put the Spirit Level on the Wing Skin as a PROBE (AWP05-64-08-050) wheel guide for the scanpaths.

(5) Spray Water onto the inspection area to aid coupling.

(6) Put the PROBE (AWP05-64-08-050) wheel at the start position of the scan and make sure that theindex of the PROBE (AWP05-64-08-050) wheel lines up with the marked scan path.

(7) Apply hand pressure to the PROBE (AWP05-64-08-050) wheel until spring resistance is met and adjustthe gain to place the BWE at 80% FSH.

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(8) Start the scan and rotate the PROBE (AWP05-64-08-050) wheel along the marked scan path, usingthe Spirit Level as a guide.

(9) Make sure that the index of the PROBE (AWP05-64-08-050) wheel is following the scan path.

(10) Complete the scan path and Pause the Screen Display. (See TABLE 21)



INPUT VALUE

Starting the Scan Scan Start Start N/A

Pausing the Scan Scan Start Pause N/A

Starting and Pausing the Scan

TABLE 21

(11) Thickness readings must not be taken directly from the A-Scan Screen Display. Readings must be takenfrom the number in the field labelled as T(A - I) located in the top portion of the Screen Display.

(12) Using the USB mouse double click on the C-Scan A - I (Thickness Scan) display in ten evenly spacedrandom areas along the complete scan. Read off the obtained thickness readings and input themaximum thickness reading obtained in accordance with TABLE 22.

NOTE : Rib Bays and False Rear Spar Inspection Areas containing Tapered Skin thickness will beidentified on the C-Scan A - I (Thickness Scan) Screen Display as a gradual thickness change.(See FIGURE 57-29-07-991-009-A)

NOTE : Skin Pockets are located in Rib Bays 19-20 thru 22-23 and False Rear Spar Inspection Areas.Pockets will be displayed as a distinct shape on the C-Scan A% (Amplitude Scan) and athickness change and distinct shape on the C-Scan A - I (Thickness Scan) Screen Display.(See SRM 57-21-11PB001 and FIGURE 57-29-07-991-010-A, Sheets 1 and 2)

NOTE : False Rear Spar Inspection area contain Steep Ramped skin thickness. The Steep Ramped areascan cause a loss of signal to occur. (See FIGURE 57-29-07-991-011-A)



INPUT VALUE

Inputting maximumpart thickness

Measurements Thickness Max. (mm) (Enter MaximumThickness across thescan)

Inputting Maximum Thickness

TABLE 22

(13) Analysis the C-Scan A% (Amplitude Scan) and C-Scan A - I (Thickness Scan) displays using thezoom function in accordance with manufacturers instructions and SRM 57-21-11PB001.

(14) Corrosion will be indicated by a reduction in the BWE reduction of 4dB (or 30% FSH) with acorresponding thickness change of 10% of the material thickness. (See FIGURE 57-29-07-991-012-A)

(15) Repeat steps LIST STRUCTURE thru or LIST STRUCTURE for all scan paths and all areas to beinspected.

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Subtask 57-29-07-971-001-A

D. Acceptance Criteria

(1) All indications that show a BWE reduction of 4dB (or 30% FSH) with a corresponding thicknessreduction 10% of the material thickness, which do not correspond the structural configuration givenin SRM 57-21-11PB001, must be classified as corrosion and recorded then reported to AIRBUS stating:(See FIGURE 57-29-07-991-012-A)- The location of the corrosion within the Rib Bay or False Rear Spar- The depth range of the corrosion- The size of the corrosion area- The scan must be saved as a DATA file for later referral. (See TABLE 23)



INPUT VALUE

File File Save Mode Inspection Data

File File File Name Enter: File Name

Saving a DATA file

File File Save Data N/A

Save DATA Files

TABLE 23

Subtask 57-29-07-943-001-A

E. Final NDT Requirements

(1) Remove all inspection equipment, couplant and markings from the inspection area.

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** On A/C ALL

INSPECTION AREA ARIB BAY 3 4

INSPECTION AREA ARIB BAY 9 10 THRU 26 27

INSPECTIONAREA

POSSIBLECORROSION

TOP SKIN

REAR SPARTYPICALRECESSRADIUS

TYPICALN_NT_572907_1_0010101_01_00

A A

RIB27

RIB9

RIB3

RIB4

AA

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FIGURE 57-29-07-991-001-A SHEET 01Inspection Area A and Possible Damage 57-29-07-PB4

Revision n: 86


** On A/C ALL

INSPECTION AREA BFALSE REAR SPAR

INSPECTIONAREA

POSSIBLECORROSION

TOP SKIN

FALSE REAR SPARTYPICALRECESSRADIUS

RIB9

RIB3

RIB4

N_NT_572907_1_0010102_01_00

B B

B B

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FIGURE 57-29-07-991-001-A SHEET 02Inspection Area B and Possible Damage 57-29-07-PB4

Revision n: 86


** On A/C ALL

INSPECTION AREA CRIB BAY 4 5 AND 5 6

INSPECTIONAREA

POSSIBLECORROSION

REAR SPAR

TYPICALRECESSRADIUS

RIB4

RIB6 CC

C C

TOP SKIN

N_NT_572907_1_0010103_01_01

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FIGURE 57-29-07-991-001-A SHEET 03Inspection Area C and Possible Damage 57-29-07-PB4

Revision n: 86


** On A/C ALL

NOTE: DIMENSIONS IN MILLIMETERS (INCHES IN BRACKETS)

140.0(5.51)

PROBE INDEX PROBE INDEX

SPRING ADJUSTMENTNUT

173.0(6.81)

151.0(5.95)

112.0(4.41)

PROBE INDEX

N_NT_572907_1_0020101_01_01

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FIGURE 57-29-07-991-002-A SHEET 01Phased Array Rapid Scan AWP05-64-08-050 57-29-07-PB4

Revision n: 86


** On A/C ALL

15.0(0.59)20.0

(0.79)15.0

(0.59)15.0

(0.59)20.0

(0.79)

20.0(0.79)

15.0(0.59)15.0

(0.59)

15.0(0.59)

50.0(1.97)

4.0(0.16)

0.50(0.02)

1.0(0.04)

1.0(0.04)

2.00(0.08)

1.5(0.06)

3.0(0.12)

5.0(0.20)

10.0(0.40)

15.0(0.60)

200.0(7.87)

50.0(1.97)

50.0(1.97)

50.0(1.97)

150.0(5.91)

A

A

A A

NOTE:

ITEM NOMENCLATURE1 REFERENCE BLOCK

2 SIMULATEDCORROSION3 LABEL

QTY1

6

4 USE 3.0 (0.12) HIGH CHARACTERS10.0 (0.39) DIA SPOTFACES

AI 7150T651 OR SIMILAR

TO MINIMUM DEPTH

MATERIAL / REMARKS

PAINT ALL SURFACES WITH PRIMER (MATERIAL NO 16006)AND FINISH NONSPOTFACE SURFACES

AFTER PAINTING ENGRAVE PART NUMBER AND STEPIDENTIFICATIONS. USE 3.0 (0.12) HIGH CHARACTERS TOMINIMUM DEPTH. FILL IN TOP COAT (MATERIAL NO. 16018).

DIMENSIONS IN MILLIMETERS (INCHES IN BRACKETS)SPOTFACE MILLED TO A TOLERANCE OF +/ 0.05 (0.002)ALL OTHER TOLERANCES +/ 0.20 (0.008).

STEP 3

STEP 2

STEP 1

99D57204164000

ITEM 3

ITEM 1

ITEM 2

WITH TOP COAT (MATERIAL NO 16018).

N_NT_572907_1_0030101_01_02

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FIGURE 57-29-07-991-003-A SHEET 01Reference Block 99D57204164000 57-29-07-PB4

Revision n: 86


** On A/C ALL

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Page 18Nov 01/10

FIGURE 57-29-07-991-004-A SHEET 01Inspection Area A Scan Paths 57-29-07-PB4

Revision n: 86


** On A/C ALL

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Page 19Nov 01/10

FIGURE 57-29-07-991-005-A SHEET 01Inspection Area B Scan Paths 57-29-07-PB4

Revision n: 86


** On A/C ALL

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Page 20Nov 01/10

FIGURE 57-29-07-991-006-A SHEET 01Inspection Area C Scan Paths 57-29-07-PB4

Revision n: 86


** On A/C ALL

N_NT_572907_1_0070101_01_00

GATE B

INTERFACE SIGNAL GATE A

SCREEN DISPLAY A

INTERFACE GATE

SCREEN DISPLAY BGATE B

INTERFACE SIGNAL GATE A

INTERFACE GATE

NO PRESSURE

PRESSURE

Page 21Nov 01/10

FIGURE 57-29-07-991-007-A SHEET 01Screen Display Gate Locations 57-29-07-PB4

Revision n: 86


** On A/C ALL

APPROXIMATLEY 4dB ATTENUATION DIFFERENCE

20% THICKNESS CHANGE

10% THICKNESS CHANGE

N_NT_572907_1_0080101_01_00

Page 22Nov 01/10

FIGURE 57-29-07-991-008-A SHEET 01Calibration Screen Display for A-Scan, C-Scan A%

(Amplitude Scan) and C-Scan A-I (Thickness Scan)

57-29-07-PB4Revision n: 86


** On A/C ALL

SKIN THICKNESS TAPER

N_NT_572907_1_0090101_01_01

Page 23Nov 01/10

FIGURE 57-29-07-991-009-A SHEET 01Typical Tapered Skin Display Screen 57-29-07-PB4

Revision n: 86


** On A/C ALL

RIB BAY 2021 DISPLAY SCREEN

RIB BAY 1920 DISPLAY SCREEN

SKIN POCKETS

SKIN POCKETS

N_NT_572907_1_0100101_01_01

Page 24Nov 01/10

FIGURE 57-29-07-991-010-A SHEET 01Typical Skin Pocket Display Screen - Rib Bay 19-20 and

20-21



** On A/C ALL

RIB BAY 2122 SCREEN DISPLAY

RIB BAY 2223 SCREEN DISPLAY

SKIN POCKETS

SKIN POCKETS

N_NT_572907_1_0100102_01_00

Page 25Nov 01/10

FIGURE 57-29-07-991-010-A SHEET 02Typical Skin Pocket Display Screen - Rib Bay 21-22 and

22-23



** On A/C ALL

AREAS OF SIGNAL LOSSCAUSED BY STEEP

RAMPED AREAS

TAPERED SKINS SKIN POCKETS

N_NT_572907_1_0110101_01_01

Page 26Nov 01/10

FIGURE 57-29-07-991-011-A SHEET 01Examples of Signal Loss caused by Skin Pockets, Tapered

Skins and Steep Ramped Skin Areas



** On A/C ALL

CORROSIONINDICATION CAUSING

AN ATTENUATION LOSS> 4dB

CORROSIONINDICATION CAUSINGMATERIAL LOSS > 10%

N_NT_572907_1_0120101_01_01

Page 27Nov 01/10

FIGURE 57-29-07-991-012-A SHEET 01Typical Skin Corrosion Display Screen 57-29-07-PB4

Revision n: 86

Documents

Wing Phase Array