RECORDS OF TIMER CONTROL CHECK

EQUIPMENT CHECKED:

Description Manufacturer Part Number Serial Number

EQUIPMENT USED FOR CHECKING:

Description Manufacturer Part Number Serial Number

RESULTS OF CHECK: (Magnetic Current Applied:1000A)

Set time value (a) seconds

Displayed time value on recording paper of

helicorder (b) seconds

Error (%) (a-b) / b x 100

Accuracy (%) Required

Accuracy Results

0.5 ±3%

1.0 ±3%

2.0 ±3%

3.0 ±3%

4.0 ±3%

PERFORMED BY:

NAME SIGNATURE POSITION

EXAMINED BY:

NAME SIGNATURE POSITION

Issue: 02, Revision: 00, Date: 15 Dec. 2011 Page 4-34

4.3 PENETRANT INSPECTION PROCEDURE 4.3.1 Scope

1. This procedure establishes the VAECO minimum requirements for conducting liquid penetrant inspection of nonporous metal, and non-metal components.

2. The penetrant examination processes described in this procedure are applicable to in-process, final, and maintenance (in-service) inspections.

4.3.2 Referenced Documents

4.3.2.1 The following documents form a part of this practice to the extent specified herein.

1. NAS 410 to latest revision - Certification and Qualification of Nondestructive Test Personnel.

2. EN 4179 to latest revision - Qualification and Approval of Personnel for Non-destructive Testing.

3. VAECO Written Procedure No: VAECO.NDT.WP01 - Qualification and Certification of personnel for NDT.

4. ASTM Standards a. ASTM E1417

b. E165 - Test Method for Liquid Penetrant Examination

c. E 1135 - Test Method for Comparing the Brightness of Fluorescent Penetrants

5. Boeing Standard Overhaul practices manual 20-20-02 6. Airbus N.T.M.

7. ATR72 NDTM 8. F70 NTM 9. ENGINE SPM

10. Standard Practice Manual 32-09-01 section 38 & 39 (Messier Bugatti) 11. GOODRICH NDT Manual 32-40-76

4.3.2.2 Order of Precedence – In the event of conflict between the text of this procedure and VAECO references cited herein, the text of this procedure takes precedence.

In the event of conflict between the text of this procedure and OEM or Aviation Authority references cited herein and aircraft maintenance practices, the text of OEM, Aviation Authority or aircraft maintenance procedures takes precedence 4.3.3 Definitions:

1. NDT Method: a type of NDT e.g. ultrasonic, magnetic particle.

2. NDT Procedure: a company document detailing control of NDT.

3. NDT Technique: A subdivision of an NDT method e.g. yoke technique.

4. NDT Code or Specification: a public document controlling standards of NDT application e.g. EN4179, Aircraft NDT Manuals, ASTM Standards.

5. NDT Instruction: A detailed step-by-step work sheet for application of a particular technique to a particular product or component. May be substituted by a Service Bulletin (SB) or Airworthiness Directive (AD).

6. Component: the part(s) or element(s) of a system described, assembled, or processed to the extent specified by the drawing.

7. In-service: refers to components that are in use or storage for their intended function

8. Linear indication: magnetic particle indications with at least a three to one length to width ratio.

9. Reprocess: repeat, after cleaning, the application and appropriate processing of magnetic particle inspection (as required).

10. Turbine engine critical components: any component on turbine engine designated by the manufacturer as “critical”.

11. Rotables: rotating engine parts.

4.3.4 Significance and Use

1. This procedure establishes the VAECO basic parameters for controlling the application of the penetrant flaw detection method.

2. Safety. There are no special safety precautions related to this method.

However inspectors should be aware of standard electrical safety practices within VAECO including operations in and around the facility and the risk of particle/fume inhalation for this method.

4.3.5 Classification

4.3.5.1 Penetrant systems covered by this procedure shall be of the following types, methods, and sensitivity levels.

4.3.5.1.1 Type:

1. Type I – Fluorescent dye 2. Type II – N/A

4.3.5.1.2 Method

1. Method A – Water washable 2. Method B – N/A

3. Method C – Solvent-removable

4. Method D – Post-emulsifiable, hydrophilic 4.3.5.1.3 Sensitivity

1. Sensitivity Level ½ - very low 2. Sensitivity Level 1 – low 3. Sensitivity Level 2 – Medium 4. Sensitivity Level 3 – High 5. Sensitivity Level 4 – Ultra high

4.3.5.2 Developers shall be of the following forms:

1. Form a – Dry powder

2. Form d – Nonaqueous for Type I fluorescent penetrant 4.3.5.3 Solvent removers shall be of the following classes:

1. Class1- Halogenated 2. Class 2 – Nonhalogenated

Issue: 02, Revision: 00, Date: 15 Dec. 2011 Page 4-36

4.3.6 General Practices

1. Responsibility for NDT Examinations - Unless otherwise specified by the Original Equipment Manufacturer (OEM) or recognised aviation authority, VAECO is responsible for the performance of all NDT examination requirements as specified herein.

2. Specifying – When NDT examination is required in accordance with this procedure, instructions, ADs and SBs shall specify the criteria by which the acceptability of components is to be evaluated. In any other cases appropriate generic NDT instructions shall be used and shall define or specify objective reject criteria.

3. Personnel Qualification – Personnel performing NDT examinations to this practice shall be qualified and certified in accordance with the VAECO Written Procedure No: VAECO.NDT.WP01 which complies with the requirements of NAS 410/EN4179.

4. Agency Qualification - N/A

5. Qualified Materials – Only materials from customer-approved suppliers may be used.

6. Equipment and Facilities – Processing equipment used in the penetrant examination process shall be constructed and arranged to permit a uniform and controlled operation. The equipment shall meet all applicable national and local safety requirements as well as the requirements specified herein.

7. Viewing Areas – Areas where parts are reviewed shall be kept clear at all times. For stationary fluorescent dye examination, Type I, the ambient visible light background shall not exceed 5 lux at the examination surface. The black lights shall provide a minimum of 1500 µW/cm² at the examination surface. Black lights shall meet the requirements of 4.3.7.8.4 A. Viewing areas for portable fluorescent dye examination shall utilize dark canvas, photographer’s black cloth, or other methods to reduce the visible light background below 5 Lux during examination and black light intensity shall meet the above requirements.

8. Drying Oven – When components are oven dried, the dryer must be a forced-air recirculating type. The temperature shall be controlled with a calibrated device capable of maintaining the oven temperature at ±15ºF of the temperature for which it is set. The oven shall not exceed 160ºF (71ºC).

The temperature indicator shall be accurate to ±10ºF of the actual oven temperature.

9. Written Instructions – All liquid penetrant examinations instructions are similar for many components. Master written instructions shall be utilized that cover the solvent removable water washable and post emulsified processes as separate techniques.

10. Examination Sequence – Final penetrant examination shall be performed after completion of all operations that could cause surface-connected discontinuities.

11. Surface Coatings – All coatings and other surface conditions, such as paint, plating, corrosion etc. shall be removed from the area to be examined prior to penetrant examination.

12. Material and Process Limitations

a. Type II penetrant examinations are not approved for use for the maintenance or overhaul of aircraft including the examination of turbine

engine critical components. These inspections shall be done only with Type I, Methods C or D (solvent removable or post emulsified, hydrophilic) processes and either sensitivity Levels 3 or 4 penetrant materials.

b. The maintenance or overhaul examination of turbine engine critical components shall be done only with Type I, Methods C or D (solvent removable or post emulsified, hydrophilic) processes and either sensitivity Levels 3 or 4 penetrant materials.

4.3.7 Specific Practices (Fig 1)

(FIG.1)

4.3.7.1 Surface Preparation – All surfaces to be examined shall be clean, dry, and free of soils, oil, grease, paint and other coatings, corrosion products, scale, smeared metal, welding flux, chemical residues, or any other material that could prevent the penetrant from entering discontinuities, suppress dye performance, or produce unacceptable background. After cleaning, parts shall be inspected as soon as possible to reduce the possibility of corrosion. In all circumstances they shall not remain unprotected for a period exceeding 24 hours.

4.3.7.2 Penetrant Application – Unless otherwise specified, the entire surface of the component shall be covered with penetrant. The component, penetrant, and ambient temperatures shall all be in the range from 40ºF to 125ºF (4ºC to52ºC) unless otherwise specified.

1. Penetrant Dwell Time – The dwell time, unless otherwise specified, shall be a minimum of 10 minutes. For temperatures between 40ºF and 50ºF (4ºC and 10ºC), dwell time shall be a minimum of 20 minutes.

CLEANING