ra 5306 – draft modification leaflets · uncontrolled copy when printed regulatory article 5306...

UNCONTROLLED COPY WHEN PRINTED Regulatory Article 5306

RA 5306 Issue 3 UNCONTROLLED COPY WHEN PRINTED of 22

RA 5306 – Draft Modification Leaflets

Rationale The general and technical instructions and information on the embodiment of Design Modifications has to be communicated to Service personnel. It is important to the accurate embodiment of the change that the detail provided is in a common format. Draft Modification Leaflets (DML) are published as modification leaflets or modification instructions to provide this level of detail.

Contents 5306(1): Preparation of Draft Modification Leaflets

Regulation

5306(1)

Preparation of Draft Modification Leaflets

5306(1) The Design Organization (DO) shall prepare and submit DML to the Type Airworthiness Authority (TAA) or Commodity Project Team Leader (PTL). In doing so, the DO shall be fully responsible for the technical accuracy of the DML.

Acceptable Means of Compliance

5306(1)


1. The DML should be prepared in the format shown in Annex A.

2. Any amendments to a DML after publication should be prepared and submitted in accordance with Annex B.

3. The need for a DML to be provided should be stated on the Modification Proposal Form (MPF) as published in the minutes of the authorising Local Technical Committee1 (LTC) as each individual modification is authorized and classified. A DML should always be prepared for modifications affecting aircraft handling or operation.

4. Where there is a separate technical publication for each different type or mark of Air System or related, product, part, appliance or Air Launched Weapon (ALW), the following should apply:

a. When the sequence of operations or the sets of parts differs between types or marks separate DMLs should be provided.

b. When there is no difference in the sequence of operations or sets of parts one DML will suffice but sufficient copies should be provided to cover each separate publication.

5. Abridged DMLs should be provided, when stipulated by the LTC.

6. DMLs should be dated and signed as technically approved by the DO.

7. DMLs, except as stated in para 10.b, complete with copies of diagrams and copies of drawings called up should be sent to the TAA or Commodity PTL. When a Proof Installation (PI) is required, the DML should be revised to address the findings of the PI prior to despatch.

8. After the DML has been agreed for publishing, the modification kit should be regarded as frozen and changes to the composition of the kit and the source of supply of any parts included should only be made with the prior approval of the TAA or Commodity PTL concerned.

9. The DO should submit a DML by the date given on the approved MPF.

1 RA 5303 – Local Technical Committee.

Regulatory Article 5306 UNCONTROLLED COPY WHEN PRINTED

of 22 UNCONTROLLED COPY WHEN PRINTED RA 5306 Issue 3

Guidance Material

5306(1)


10. The DO may be directed to provide abridged DMLs by the LTC, under various circumstances including the following:

a. When a non-retrospective modification affects the operation or handling of an Air System (Para 1 and 13 of the DML).

b. When a modification will be embodied only by depth support and when classified with the following rider 'On embodiment on Repair and Recovery at…….(a specified organization or location)'. In such cases the DML (sometimes known as embodiment instructions) may consist of Para 4, 5, 7, 8, and 9.

c. When a modification does not involve supply or modification action by the Service, but it is necessary for the Service to know about the modification, Para 1, 12, 13 and 14 only of the DML may be completed.

d. When a modification is authorized for embodiment on site by a Contractors Working Party (CWP). This type of DML will be referred to as a DML CWP type. Where modifications are embodied by a CWP before the official issue of the modification leaflet (either at the Contractors' works or at a Service unit) the Contractor is to issue a copy of the DML to the senior engineering officer at the Service unit(s) concerned. If necessary for a CWP to embody a modification before a DML has been prepared, the Contractor is to provide the Continuing Airworthiness Manager and the TAA or Commodity PTL with adequate information on the purpose and extent of the modification.

11. DMLs, after editing by the Service department concerned, are published as modification leaflets or modification instructions to provide:

a. General instructions and information.

b. Technical instructions to Service personnel on the way in which the work will be done.

c. Supply management instructions to Service personnel.

12. Modification leaflets or instructions are issued in the relevant technical publication series.

13. Leaflets for modifications to aircraft pylons and special-to-type carriers will be issued in the Topic 2 of the Aircraft Maintenance Manual (AMM) for the equipment. Where leaflets have already been issued in the aircraft series a token leaflet will be published in the appropriate equipment Topic 2 listing those leaflets which are to remain in the aircraft Topic 2.

14. The Contractor is to attach to each copy of a DML a sheet giving the name, department and full contact details of the member of their staff to whom any technical queries can be referred.

15. It will sometimes be easier for a Contractor to produce a full standard DML rather than attempt to decide which paragraphs will be required by the Service. In these circumstances, the Contractor may, if he so wishes, submit the full DML.



ANNEX A

DRAFT MODIFICATION LEAFLET – STANDARD LAYOUT AND COMPLETION INSTRUCTIONS

A.1 Introduction

A.1.1 The purpose of a modification leaflet is to inform the Service(s) what it has to do, supply or

know and this should be the guiding principle in preparing a DML.

A.2 General Instructions

A.2.1 The standard layout and completion instructions should be followed unless otherwise

directed by the LTC. Where it is a Service(s) department(s) responsibility to complete or insert

information this is stated. An electronic copy of supporting documentation is preferable. The subject

documentation will be in a format agreed with the TAA or Commodity PTL and/or the DO as

appropriate.

A.2.2 Main paragraph and sub-paragraph numbers, except for abridged leaflets, should be

included, and the text inserted as appropriate. Inappropriate paragraphs and sub-paragraphs should

be indicated by a ‘NONE’ or ‘Not applicable’ entry. Inappropriate alternative sub -paragraphs should

be omitted. When an abridged leaflet is issued paragraph numbers are not to be left blank but are to

be closed up.

A.3 Drawings

A.3.1 DMLs may be illustrated by drawings specifically prepared for and supplied with the DML.

If possible, design drawings should be avoided because:

a. Large drawings are awkward to handle under Service conditions;

b. Many operations can be more easily understood if illustrated by simple perspective sketches;

c. A manufacturing drawing will merely show the part before or after it has been modified whereas a specifically prepared sketch can show the scope of the modification more clearly, particularly when the part is complex;

d. Embodiment of the modification will be delayed until the design drawings are obtained.

A.3.2 Where a modification may affect armament safety, the electrical wiring diagrams necessary for its embodiment should give full routeing details.

A.3.3 Drawings which are intended to form part of a leaflet will be prepared in a form suitable for retention by the Contractor as a master original and for the embodiment of subsequent changes.

A.3.4 Duplicates of master drawings, copies of which are to appear in the DML will be sent to the

TAA or Commodity PTL with the DML or amendment (Annex B).

A.4 Security Marking

Security marking of classified DMLs is to follow the requirements of JSP 440.



STANDARD LAYOUT

System, main assembly LRU/component title

AP…………….. 2 a.

Mod Leaflet No ….. b.

Copy No. c.

Mth/Yr…….. (Amdt ……. ) d.

Short title e.

MAIN EQUIPMENT (Air System Type & Mark)

f.

Mod No . . . . (Class . . . . .) g.

File ref . . . . . . . . . . . . . . . . h.

Title of modification i.

1 INTRODUCTION

1.1 This modification supersedes/partially supersedes/is satisfied by the work called for by Mod No .………/Service Modification No . . . /Technical Instruction…….…or, if appropriate

j.

1.2 This modification does not supersede, partially supersede or satisfy the work called for by any other modification, Service Modification, or Technical Instruction.

k.

1.3 This modification is the cover/complementary modification to component Mod No ……… or, in the case of component modifications

l.

1.4 The cover/complementary airframe modification to this modification is Mod No ……… m.

1.5 This modification is essentially connected with Mod No ………; if that work is not already embodied it must be effected concurrently.

n.

1.6 This modification is applicable only if Mod No ………is/is not already embodied. o.



COMPLETION INSTRUCTIONS

a. Where the reference for the Topic 2 has not been promulgated the basic publication number for the equipment shall be entered, followed by the words ‘in preparation’.

b. The TAA or Commodity PTL will enter the leaflet number.

c. Heading required only for leaflets security graded secret and above.

d. The TAA or Commodity PTL will enter the month, year and amendment number.

e. To be inserted by the TAA or Commodity PTL. Leave space for two lines. Where a UK modification to an American Air System or related product, part, appliance, or ALW is identical with the American modification the Engineering Change Proposal number should be inserted under the short title where known.

f. Insert name and mark of Air System or related product, part, appliance, or ALW. For an Air System this should include those marks sold to a foreign nation. For related products, parts, appliances, or ALWs a list of the Air Systems, including those sold to a foreign nation, in which the modified product, part, appliance, or ALW will be fitted should follow the main title. Enter Service applicability eg RN, Army, RAF, Royal Netherlands Navy etc.

g. Enter the modification number and classification given on the MPF.

h. The TAA or Commodity PTL will insert the file reference.

i. Enter the title given on the MPF.

j. Insert a statement as to why the modification is introduced and how it achieves the desired results. The statement should be positive eg ‘To extend aircraft fatigue life’ etc; phrases such as ‘MOD requirement’, ‘to comply with the Final Conference Report’, etc. should be avoided.

k. State one of the alternatives. Omit inapplicable words.

l. Include this sub-para if applicable, omit inapplicable words and insert modification number and title.

m. Include this sub-para if applicable, omit inapplicable words and insert modification number and title.

n. Include this sub-para if applicable and insert modification number and title.

o. Include this sub-para if applicable, delete inapplicable words and insert modification number and title.



STANDARD LAYOUT

2 PROOF INSTALLATION

Proof installation satisfactorily carried out on this DML p.

at …………………………………………………………………………..

on ………………………………………………………………………….

or

Proof installation originally required but subsequently cancelled at TAA or Commodity PTL request.

or

Proof installation not required for this modification.

3 EMBODIMENT

State the extent of application of the modification to the type of product, part, appliance, or ALW concerned and include any special embodiment instructions issued by the TAA or Commodity PTL.

Approximate Time Required For Embodiment q.

The work will take approximately . . . . . man-hours (. . . to strip; . . . to embody; . . . to reassemble; . . . to test).

r.




p. Use this entry for airframe modifications or state one of the alternatives. Insert location where proof installation carried out and type, mark and serial number of Air System used.

q. Required for modifications embodied by the Service(s) or CWP.

r. Whenever possible, and always when the total man-hours exceed 10, give the time required for strip etc.



STANDARD LAYOUT

4 DRAWINGS REQUIRED s.

State drawing/figure numbers incorporated in this leaflet and/or list the drawing number(s) and title(s) of drawing(s) to be demanded.

Drawing No Title

…………………….. ……………………..

…………………….. ……………………..

or

No drawings are required for the embodiment of this modification.

5 PARTS AND SPECIAL TOOLS REQUIRED t.

Parts and materials

Ref No Part No Nomenclature Qty Class of equipment

…………………….. …………………….. …………………….. …………………….. ……………………..

…………………….. …………………….. …………………….. …………………….. ……………………..

The following hazardous substances are used during embodiment of this modification: (refer to JSP 515)


…………………….. …………………….. …………………….. …………………….. ……………………..

…………………….. …………………….. …………………….. …………………….. ……………………..

or the following statement as appropriate

No parts or materials are required for the embodiment of this modification.

State the details of any special tools and/or test equipment required.




s. In general, drawings should be incorporated into leaflets and be of the simple line diagram or sketch type, to engineering drawing standard. For standard A4 size, the maximum size of the printed illustration (including captions, sheet number, figure number, title and security markings) is 260mm x 165mm. Line diagrams or sketches to be used as working drawings are to have all detail large enough to be easily interpreted. Photographs should only be used to complement drawings.

t. List the parts and any special tools required.



STANDARD LAYOUT

6 MODIFICATION OF SPARES u.

The following list shows the spares affected by this modification and the parts required to modify them:


…………………….. …………………….. …………………….. …………………….. ……………………..

…………………….. …………………….. …………………….. …………………….. ……………………..

Part(s) required: v.

Spares will be modified by ……………………..……………………..……………………..……………………..

……………………..……………………..……………………..……………………..……………………..…………

w.

or, if appropriate

No spares are affected by this modification. x.

7 CHANGE OF REFERENCE, PART AND ASSEMBLY NUMBERS y.

The embodiment of this modification changes reference, part and assembly numbers as follows:

OLD NEW

Ref No Part/Assy No Nomenclature Ref No Part/Assy No Nomenclature z.

………………… ………………… ………………… ………………… ………………… …………………

………………… ………………… ………………… ………………… ………………… …………………

or, if appropriate

There are no changes of reference, part or assembly numbers as a result of this modification.




u. The spares referred to are those assemblies or components which themselves need to be modified consequent upon the introduction of the modification. Should a part, having other uses, be modified in such a way as to make it unsuitable for these other uses, it will have to be re-referenced for the particular application under consideration; it would therefore become a new part. Include all known stores reference and NATO stock numbers.

v. List the parts required to modify each spare, immediately below each spare listed.

w. Insert at end of list. Leave a space of five lines for Service department entry.

x. Insert after Para 6 main title, if applicable.

y. The list of parts, of which the reference, part or assembly numbers are changed shall include the spares affected as listed in Para 6. Include all known stores reference and NATO stock numbers. This paragraph refers only to those parts which are physically reworked to the new standard and not to replacement parts.

z. Omit new nomenclature if same as old.



STANDARD LAYOUT

8 SEQUENCE OF OPERATIONS aa.

The following is the sequence of operations:

WARNINGS

1 BEFORE ANY ELECTRICAL CIRCUIT IS DISTURBED OR DISCONNECTED, ALL ELECTRICAL POWER SUPPLIES IN, TO OR FROM THE . . . .*. . . . ARE TO BE DISCONNECTED. POWER SUPPLIES ARE TO BE RECONNECTED ONLY WHEN THE PERSON RESPONSIBLE FOR EMBODYING OR INSPECTING THE MODIFICATION IS SATISFIED THAT ALL ACTION HAS BEEN TAKEN TO MAKE THE . . . .*. . . . SAFE FOR RECONNECTION.

ab.

2 THIS MODIFICATION WILL BE EMBODIED AS DIRECTED WITHOUT ANY DEVIATION AND THE PRESCRIBED ROUTEING OF ELECTRICAL CABLES WILL BE STRICTLY FOLLOWED.

ac.

3 Safety Precautions Specify the safety precautions that are to be taken. The leaflet will contain a specific statement detailing the Health and Safety requirements (including COSHH, etc).

4 Installation Detail the sequence of operations, which should be practically proven if possible, required to complete the installation. List any changes to fuse and circuit breaker indexes. Include full instructions for, physically marking the equipment where this is a requirement, and recording the embodiment.

ad.

5

6

etc.




aa. The sequence of operations are to be in logical order. Parts to be manufactured by Service units are to be detailed first, followed by removal, dismantling, embodiment, re-numbering, re-assembly and re-fitting, and the necessary routine testing by reference to appropriate Service publications.

When the work involved in the embodiment of the modification has to be done by the Contractor (usually by return of components), and other work has to be done on the aircraft, enter only the work to be done by the Service.

Although changes of reference, part and assembly numbers are listed in Para 7, the physical action required to effect such changes and also to record embodiment of the modification on the modification plate, are to be included in the sequence of operations.

When quoting both part number and reference number the part number is to come first thus:

Coupling, Part No DTD900/4516 (33C/8060-99-224-3421)

ab. Insert WARNING 1 in all modification leaflets. *Insert the main equipment concerned eg missile, aircraft simulator etc.

ac. Insert WARNING 2 in modification leaflets dealing with modifications to weapon carrying aircraft.

ad. Each operation will be separately paragraphed.



STANDARD LAYOUT

9 SPECIAL TESTS AFTER EMBODIMENT ae.

1) When the modification has been embodied and inspected do the following special tests: af.

and/or, if appropriate

2) When this modification has been embodied and inspected do functional tests of all systems which have been disturbed for the purpose of embodying this modification, in accordance with current testing instructions.

and/or, if appropriate

3) As the embodiment of this modification involves disturbance of the …*…. system, an independent check of the system will be made in accordance with current requirements for Independent Checks.

ag.

and, if appropriate

4) A flight trial is/is not required to prove satisfactory embodiment of this modification

or, if appropriate

5) No special testing is required after the embodiment of this modification but any other appropriate and associated testing will be done.

10 RECORDING ACTION ah.

When this modification has been embodied and inspected in accordance with current authorized procedures the following recording action will be taken: ……………………..……………………..……………

……………………..……………………..……………………..……………………..……………………..…………

ai.

and, if appropriate

The following MOD Form 703A entry will be made against Mod ***. aj.

or, if appropriate

No recording action is necessary.

11 DISPOSAL OF REDUNDANT PARTS

List and state the disposal action of all the parts removed and not reinstalled as a result of the modification under the following headings:

Ref No Part No Nomenclature Qty Class of equipment ak.

…………………….. …………………….. …………………….. ………………… ……………………..




ae. Detail any Operating Instructions/Procedures applicable to the installed modification and/or refer to any existing instructions.

af. List special tests. Reference should not be made to documents not available to the Service(s).

ag. * Enter name of system.

ah. If entries are required in records add ‘Enter embodiment of modification in the appropriate records’; if a modification plate or label is fitted to the item also record the ‘strike off’ or ‘stamp on’ number.

ai. Explicit instructions are to be given regarding the entries to be made in the appropriate aircraft/component records and any further documentation that might be needed for particular requirements. Instructions will also address physical marking of the equipment, and endorsement of equipment cards for not in use (NIU) items.

aj. MOD ►Defence Aircrew Publications◄ Squadron (►DAPS◄) has responsibility for assessing whether a modification has an effect on the management of a system or the handling of an Air System. If ►DAPS◄ decides that there is an effect (in which case the Modification Leaflet will be printed on pink paper) and that the embodiment of the modi fication is not apparent to the aircrew operating the Air System, ►DAPS◄ will provide narrative for part 10 of the Modification Leaflet through the TAA. Transcribe this wording at part 10 without change to MOD Form F703A.

***Insert Modification Number

ak. List and state the disposal action for redundant parts.



STANDARD LAYOUT

12 EFFECT ON MASS AND MOMENT al.

This modification causes a mass change of . . .*. . . lb/kg and a change of moment of plus/minus . . .*. . . lb in/kg cm. (use appropriate units)

or

This modification causes a change in mass and moment as follows:

Mass change Horizontal index Vertical index

…………………………………… …………………………………… ……………………………………

…………………………………… …………………………………… ……………………………………

or

This modification has no effect on mass or moment.

13 EFFECT ON OPERATION AND HANDLING am.

……………………………………………………………………………………………………………………………

……………………………………………………………………………………………………………………………

……………………………………………………………………………………………………………………………

……………………………………………………………………………………………………………………………

……………………………………………………………………………………………………………………………

……………………………………………………………………………………………………………………………

……………………………………………………………………………………………………………………………

an.

or, if appropriate

state “None”.

14 CHANGES IN POWER SUPPLY REQUIREMENTS ao.

This modification alters the electrical loading of the primary power supplies as follows:

The AC/DC load is increased/decreased by . . . . . . Amps at. . . . . . .Volts




al. The words ‘plus’ and ‘minus’ are to be used; the arithmetical signs ‘+’ and ‘-’ are not be used. Changes are not to be described as ‘negligible’ or ‘less than say ½ lb’. The units used are to be the same as quoted in the technical publication for the item concerned.

am. Insert ‘AIR SYSTEM (INCLUDING INSTALLED EQUIPMENT)", “PRODUCT”, “PART”, “APPLIANCE” or "AIR LAUNCHED WEAPON " as appropriate.

When a modification to an Air System or related product, part, appliance, or ALW has an effect on the management of a system or the operation or handling of an Air System which will engender a change in the aircrew manual, full details of the effect is to be given. It is important that the information does agree with that which is being prepared by the Contractor for inclusion in the aircrew manual and close liaison between the design department and the Chief Test Pilot is essential.

an. Insert: effect on normal operating and handling procedure;

effect on emergency operating and handling procedure; and, for Air System,

effect on limitations and performance.

ao. If applicable enter and complete the statement:



STANDARD LAYOUT

15 EFFECT ON SERVICING AND GROUND SUPPORT EQUIPMENT

Enter particulars of the effect on servicing and on ground support equipment including test equipment and simulators or state “None”. 16 EMC AND TEMPEST CLEARANCE EMC clearance has been given/is awaited If the Air System has secure systems, insert: Embodiment of this modification invalidates the TEMPEST clearance until formal clearance has been received. An appropriate entry is to be made in the Air System documentation for TEMPEST cleared Air System.

or TEMPEST clearance has been given for all Air System.

or TEMPEST clearance is not required. 17 NIGHT VISION GOGGLES (NVG) COMPATIBILITY Detail any effect on the NVG compatibility of the aircraft/equipment or state “None”.

Technically approved for . . . . . . . . . . . . . . . . . . . . . . . . . . . ……………………………………………..(DO)

Name…………………………………………………….Signature………………..………………………………..

Date………………………….



ANNEX B

AMENDMENTS TO DRAFT MODIFICATION LEAFLETS

AND PUBLISHED LEAFLETS

B.1 If a modification leaflet has been published, an amendment is to be prepared by reference

to the printed leaflet and not to the DML.

B.2 If the amendment is simple and can easily be incorporated by the Service holders of the

leaflet, the amendment will be prepared in the manner and style of Annex C ‘Amendments to

modification leaflets - specimen’.

B.3 If the changes are complex, a new draft should be submitted. If the DML has been printed,

the new draft should be annotated ‘(Alteration . . . . . . . incorporated)’ and will be issued as a

replacement for the existing printed leaflet. The significant changes in the new leaflet are to be

indicated by a black triangles thus ►......................◄

B.4 If modification sets have been delivered by the Contractor, or for no Contractor parts

modification embodiment has been started, MOD will normally approve amendments to an existing

leaflet to cover minor corrections which do not affect provisioning action, the work involved or the

technical or operational value of the modification.

B.5 Where a proposed amendment is outside the scope of clause B.4 above, the TAA or

Commodity PTL will need to consider whether it is acceptable. If not acceptable as an amendment

and the change is supported, it will be necessary for a further modification to be submitted. If this

modification is subsequently approved a further draft leaflet is to be prepared.

B.6 To assist MOD in their considerations, all draft amendments to leaflets are to be

accompanied by a statement giving the necessary information as detailed in Annex D.

B.7 Amendments are not to be submitted which affect any fixed or maximum price agreement reached for the subject modification, and any draft amendment which does not affect such agreements will be accompanied by a statement to that effect. When the costs shown on the MPF are estimates, any change of cost shown on the statement will be taken into account by the TAA or Commodity PTL when considering the proposed amendment.



ANNEX C

AMENDMENTS TO MODIFICATION LEAFLETS - SPECIMEN

Main undercarriage AP 101B-3012-2 Mod Leaflet No 332 Introduction of uplock hook (Alteration 1)

AIR SYSTEM TYPE, ROLE & MARK Amend above leaflet as follows:

1) Change ‘Introduction of uplock hook’ above to read ‘Introduction of uplock hook with modified contour’.

2) Para 1, line 2. Delete ‘a modification’ and substitute the modification reference number.

3) Para 5(1)(a)(ii). Amend items 1 to 3 to read:

Ref No Part No Nomenclature Qty Class of equipment ‘26EH/.... W.96952 Template, port 1 C 26EH/.... W.96393 Template, stbd 1 C 26EH/.... AS.987 Rivet 3 C’

4) Para 5(1)(b), Item 6. Delete Qty ‘2’ and classification ‘C’ and substitute ‘4’ and ‘A’.

5) Para 5(1)(b) Add to end of list

Ref No Part No Nomenclature Qty Class of equipment ‘28W/..... SP.16/E Washer 2 C’

6) Para 8. After operation (2) insert:

Note: Air Systems in which this modification has been embodied are to be inspected.’

7) Para 8, Operation (3) line 6. After ‘embodied’ insert the modification reference number’.

8) Para 8, Operations (5) and (6). Delete these two operations and re-number operations (7) to (10) as ‘(5)’, ‘(6)’, ‘(7)’ and ‘(8)’.

9) Drawing No AP 101B-3102-2/332/75, Sheet 2. Remove and substitute Drawing No AP 101B-3102-2/332/75 dated 30 February 2000 attached.

10) Drawing No AP 101B-3102-2/332/76, Sheet 4. In top left-hand corner, against ballooned Part No ‘X.234’ insert ‘PORT SIDE ONLY’.

11) After Drawing No AP 101B-3102-2/332/77, Sheet 6 attach to the leaflet the new drawing No AP 101B-3102-2/332/77, Sheet 7.

Technically approved for . . . . . . . . . . . . . . . . . . . . . . . . . . . ……………………………………………..(DO)

Name…………………………………………………….Signature………………..………………………….

Date………………………….



(For use by MOD)

ANNEX D

STATEMENT TO ACCOMPANY DRAFT AMENDMENTS TO MODIFICATION LEAFLETS

Amendment No to Leaflet

for Mod No (complete as appropriate)

1. Name of item affected. 2. Description of modification. (as on the MPF) 3. Is corrective action required for mod sets or kits already delivered? (Answer ‘Yes’ or ‘No’) 4. Does this amendment necessitate retrospective action for items already modified to earlier instructions? (Answer ‘Yes’ or ‘No’) 5. State reasons for amendment. (Give details: it is insufficient to state ‘design error’, ‘embodiment instructions incorrect’, etc.) Note: If the answer to either Question No 3 or 4 is ‘Yes’, Question Nos 6-15 are to be answered. If the answers to both Questions Nos 3 and 4 are ‘No’ the remaining questions need not be answered. 6. Give details of any other modifications affected by this amendment. (eg aircraft "cover" or component modifications). 7. Will the approval of this amendment cause an alteration to the estimated costs given on the MPF or equivalent for the modification? If so, by how much? 8. If mod sets or kits are affected, how many have been issued and to whom? 9. What corrective action is required for mod sets or kits already del ivered? 10. Has delivery of mod sets been suspended until corrective action has been taken? 11. If additional Contractor supply items are required, state when available. 12. Are additional Service supply items required? If ‘Yes’, state full details. 13. What retrospective action is required for items already modified to earlier instructions? 14. Has delivery of items been suspended until corrective action has been taken? 15. Has the Contractor's working party or embodying Contractor already taken corrective action? If ‘No’, state approximate date when this will be done. Technically approved for . . . . . . . . . . . . . . . . . . . . . . . . . . . ……………………………………………..(DO)

Name…………………………………………………….Signature………………..…………………………

Date………………………….



Name and address of DO Draft Amendment No . . . . . . . . . . . . . .. to Leaflet for Modification No . . . . . . . . . . . . . . The draft amendment proposed is: (a) Acceptable as an amendment (b) Not considered to be necessary (c) Necessary but will require to be introduced by further modification action. For MOD

Name…………………………………………………….Signature………………..………………………

Date………………………….

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