Civil Aircraft Inspection Procedures

728 Pages·2016·21.67 MB·English

Airworthiness Division
Civil Aviation :Authority
Civil Aircraft
Inspection Procedures
Part I -- Basic
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CIVIL AVIATION AUTHORITY CIVIL AIRCRAFT INSPECTION PROCEDURES
Issue 33
Junel986
PART I - BASIC
LIST OF LEAFLETS
Check List of References . . . . . '. .. . . . . . . . . . . '.. . . . . .. . . .. . . .. .. .. Issue 10, June, 1986
Foreword . . . . .. . . .... . . . . . . .·. . . . . .. . . .. . ; .. Issue 20, January, 1981
AIRWORTHINESS PROCEDURES
BL/1-4 Engineering Drawings .............. ~- ................ Issue 3, 16th May, 1975
BL/1-5 Concessions During Manufacture . . . . . . . . . . . . . . . ;. . . . . .. '.. Issue 3, December, 1983
BL/1-7 Storage Conditions for Aeronautical Supplies ........ ;. .... · Issue 3, December, 1983
BL/1-11 Weight and Balance ofAircraft ........................... Issue 2, June, 1986
BL/1-12 Clean Rooms . . . . . . .. .. . . . . .. . . . . . . . . . . . . . . .. . . . . .. Issue 2, December, 1983
BL/1-16 Condition Monitored maintenance .. .. .. .. .. . . .. .. .. .. .. .. Tssue 1, December, 1981
IDENTIFICATION MARKING
BL/2-3 Bolts and Screws of British Manufacture-.. .. . . . . .. . . . . .. .. Issue 4, 24th February, 1971
BL/2-4 Identification Markings' on Meta.lie Materials . . . . . . .. .. .. .. .. Issue 2, December, 1979
BL/2-6 Nuts ofBritish Manufacture ............................ Issue 3, 24th February, 1971
BL/2-7 Standard Fasteners of American Manufacture . . .; . . . . .. . . .. Issue 1,. 3rd December, 1976
METROLOGY
BL/3-1 Measurement of British Association and
Whitworth Form Threads ........................ Issue 1, 1st July. )957
(Received January, 1981)
BL/3-2 Measurement of Unified Threads . . . . . . . . . . .. . . . . . . .. .. . . .. Issue 2, 24th February, 1971
·1 BL/3-3 Surface Te~Measurement .......................... Issue 2.14thMay, 1976
BL/3-4. Measuring Instruments Based on the Vernier Principle .......... Issue 1, 1st November, 1964
.· (Received January, 1981)
BLt3-5 Measuring Instruments -Micrometers.. .. ............ Issue 1, 30th April, 1966
(Received January, 198J)
I
MATERIALS
BL/4-1 Corrosion -Its Nature and Control.. .. .. .. .. .. .. .. .. .. .. Issue 4, June, 1982
BU4-2 Corrosion -Removal and rectification .. . . .. . . .. . . . . . . . . . . Issue 3, June, 1982
. BL/4-3 Corrosion -Methods of Protection . . .. .. . . . . . . . . . . ' . . . . . . Issue 3, June, 1982
. BL/4-10 Mercury Contamination of Aircraft Structures.~ ............ Issue 1, 15thNovember, 1974
ENGINEERING PRACTICES AND PROCESSS
BL/(;'~f .·Soft Soldering.. .. · .................................. Issue 3, 1st February, 1974
BL/6-2 /Brazing .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. Issue 3, 1st Febri;lary. 1974
BL/64 Ox.y-Acetylene Welding.. .. · .................. Issue 4, June, 1980
! •• .. .. ••
BLJ6.;5 Arc Welding . . .. .. .. .. .. .. .. . . .. .. .. .. . . . . .. .. .. . . . . Issue 3, June, ] 980 .
BL/6-6 Timber Conversion :-: &pru~e .. .•. . .. .. .. .. .. .. .. .. .. .. .. Issue 1. 1st August, 19~ O
., ., · {ReviewedJanuary, 1981)
BL/6-7 Synthetic Resin Adhesives.. .. .. .. .. .. .. .. .. .. .. .. .. .. Issue 3, December. 1979
BL/6-8 Degreasing -Trichloroethylene .. . . ... . . .. .. . . . . .. . . . .. . . Issue 3, 15th June, 1970 :
BL/6-12 Resistance Welding-Spot Welding.. .. .................. Issue 3, December, 1985
BL/6-13 Locking and Retaining_Devices .. .. ....· .. .. .. .. .. .. .. .. Issue 1, 1st February, 1974
"BL/6-14 BaUand Rollet Bearings.. .. .......................... Issue 1. 11th June, 1974
Bl16-15 Manufacture of~gid Pipes.. .. ........................ Issue 2, 1st April. 1973
BL/6-16 Re~istance Welding.-Seam Welding Procedure.. .. .. .. .. .. Issue 2, December, 1984
BL/6-18 Machining of Titanium and Titanium Alloys.. . ............. Issue 2, 1st April, 1973
BL/6-19 Cl~iness of Aircraft .. .. . . . . . . .. . . . . .. . .. .. . . . . . . .. .. Issue 3. December, 1982
BL/6-20 PpintFinishingofMetalAircraft ........................ Issue2.14thNovember, 1975
BL/6-22 thread Inserts . . . . . . .. . . .. . . . . . . . . .. .. . . . . .. .. . . .. .. Issue_ 2, January, 1981
BL/6-24 Cable -Splicing.and Swaging.. .. ............ :. ........ Issue 2, 16th May. 1975
BL/6-25 Fabric Cdvering .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. Issue 3, 18th May, 1978
BL/6-26 ])oping .:. . . . . . . .. . . . . .. . . .. .. .. .. . . . . . . . . . . .. . . . . . . Issue 2, June, 1984
Bl16-27 _Solid Rivets.. .. .......... ·: ......................... Issue 1, 1st April, 1972
BL/6-28 -,Hollow Rivets and Special Fasteners.. .. . .. .. .. .. .. .. .. .. Issue 1, 1st April, 1972
BL/6-29 Riveting . . . .. . . . . .. . . .. .. . . .. . . . . .. .. ·.. .-. .. .. . . . . .. Issue 1, 1st April, 1972
BL/6-30 Torque Loading .. · .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. Issue 1, 1st October, 1972
PROTECTIVE TREATMENTS
BL/7-1 Anodic Oxidation .. · .... ·: ............................ Issue 3; 16thDecember, 1968
BL/7-2. Cadmium Plating .................................. .. -Issue 7, December, 1984
BL/7-3 Chromate Treatment of Magnesium Alloys ................ Issue 3, 23rd June, 1969
(Reviewed December. 1984)
.BL/7-4 Phosphating of Steels .. .. .. .. .. .. .. .. .. . . .. . . . . .. .. .. Issue 2. June, 1985
.· BL/7-5 . Protection of Magnesium Alloys.. .. .................... Issue 2. June, 1985
1
. I. ..
2
NON-DESTRUCTIVE .EXAMINATIONS. \
· BL/8-L Oil and Chalk Processes . . .. . . .. . . . . . . . . . . . . . . . . .. . . .. Issue 3, 15th June, 1962
(Reviewed January, 1981)
BL/8-2 Pen--tbye Processes .. . . . . . . . . . . .. . . . . . . . . . . . . . . .. Issue 2, 1st Novembe,;, 1964
· (ReviewedDecember, 1983)
· ·BL/8-3 Ultrasonic Flaw Detel.-~d Thickness Measurement .. . . . . . Issue 2, 28th June. 1971
(Reviewed December, 1983
BL/8-4 Radiological Examination of Aircraft Structw:.~- ~.• . - ......_ ........ lssu~ 3, 28th June .. 1971
. - --- (Reviewed December. 1983) ··
BL/8-5 Magnetic Flaw Detection.. . ............................- Issue i.Jlth June, 1974 ,
BL/8-7 FbiQrescent Penetrant Processes . . . . . : . . . . . . . . . . . . . . . . . . Issue·], 15th April, 1965
- - (Reviewed December, 1983)
~-8: 'Eddy Current~ods ....................,, ............ Issue 1, 1st April, 1973'
BL/8-9 . Ettd.Q$oope Inspections .. "-~- .... .. .. .. .. .. .. .. .. .. .. Issue 1, December, 1982
HEAT-TREATMENTS
BL/9-1. Wrought Aluminium Alloys .. .. .... .......... . . Issue 3, I st December, 1958
'-,·• •.•
TESTlNG OF MATERIALS ANllCHEMICALS SOLUTIONS
BL/10-3 Testing ofMetallic Materials ................ :. ~- -~~- :· .. .. Issue 2; 15thJune, 1970"'
BL/10-9 Performance Testing of Penetrant Testing Materials .. · ."'- :--- .. Issue 1, 15th April, 196§
(Review.ed IJecember, 1983)
• --~<~ -
3

CIVIL AVIATION AUTHORITY CIVIL AIRCRAFT INSPECTION PROCEDURES
Issue 10
June, 1986
CHECK LIST OF REFERENCES
Because the numbers of some Leaflets were changed when CAIP was divided into Parts I and II,
cross-references to them in other Leaflets became incorrect. It was not considered practical to
re-issue a large number of Leaflets solely for the sake of altering cross refe rences and information
7
on the change of numbers was therefore included in the List of Leaflets.
Subsequent re-issues of Leaflets have considerably reduced the number of incorrect cross
references and those that remain are shown in the following Table. The Table will Be amended as
further Leaflets are re-issued with corrected cross-references.
Reference Is Made In To Should Now Be To
BL/ 6-15, 1.2 AL/4-1 AL/3-21
BL/6-15, 1.2 AL/5-1 AL/3-22
BL/6-29, 1 and 7 AL/9-1 AL/7-14
BL/ 6-30, 3.4 BL/S-1 BL/6-13
BL/7-3, 1.4 BL/ 16-20 BL/6-20
BL/9-1, 5.7 AL/7-5 BL/6-27
AL/3-2, 1.3 AL/3-1 and AL/3-4 AL/ 3-7 in both instances
AL/3-2, 7 BL/5-2 BL/6-14
AL/3-6, 1.1 ,AL/4-1 AL/3-21
AL/3-9, 1 EEL/2-1 EEL/ 1-7
AL/3-19, 1.1 AL/4-1 AL/3-21
AL/3-19, 1.1 and 4.4.1 AL/S-1 AL/ 3-22
AL/3-23, 11.1.2 EEL/4-1 EEL/ 1-6
AL/ 3-24, 10.9.4 AL/5-1 AL/3-22
AL/7-l, 1.2 AL/9-1 AL/7-14
AL77-8, 1.3 BL/5-1 BL/6-13
AL/7-8, 6 BL/5-1 BL/6-13
.... _AL/7-12, 3.2 NOTE AL/ 3-1 and AL/ 3-5 AL/ 3-7. in both instances
ALj-7-12, 3.4.5 AL/3-1 AL/3-7
" " BL/5-1 BL/6-13
AL/7-13, 8.1.4 NOTE AL/9-1 AL/7-l4
EL/3-1, 1.3 EL/5-3 EL/5-2
PL/ 1-3, 3 NOTE EEL/4-1 EEL/ f-6
*EEL/ 1-6, 1.2 EEL/ 1-5 EEL/ 1-3
" " EEL/2-1 EEL/L-7
RL/3-1, 3.1 RL/3-2 RL/ 3-2 is cancelled
GOL/ 1-1, 7.7 AL/ 11-13 AL/11-3
*Some copies only

CIVIL AVIATION AUTHORITY CIVIL AIRCRAFT INSPECTION PROCEDURES
Issue 20.
January, 1981.
FOREWORD
INTRODUCTION Civil Aircraft Inspection Procedures, hereinafter referred to as
the 'Inspection Procedures' or 'Leaflets' are published by the Civil Aviation Authority
(CAA). The Leaflets give information on a variety of matters concerned with the inspec
tion of civil aircraft during manufacture, overhaul, repair and maintenance. Leaflets
which may assist and increase the knowledge of the reader on fundamental subjects such
as workshop methods and processes are also included.
1.1 The information is essentially of a general nature which does not include detail on
specific types of aircraft and engines, specialised equipment and component parts fitted
·t o civil aircraft. Manuals, published by the appropriate constructors and manufacturers,
should be consulted for detailed information. ·
1.2 The interpretation of. the Leaflets and the application· of the information is greatly
dependent on the background knowledge of the reader. In preparing the Leaflets it is
assumed that the reader is familiar with the general engineering practices and working
procedures of the civil aircraft industry. Nevertheless, a certain amount of background
information is provided where· this is considered necessary for the understanding of the
text, exceptions being where a Leaflet deals with a specialised subject (e .g~ Leaflet RL/2-1,
ADF Loop Aerials, where it is assumed that the reader will be familiar with radio theory
and practice) or where it is known that adequate text books are readily available.
2 LAYOUT The Inspection Procedures are presented as numbered Leaflets contained
in two separate Parts:-
(a ) Part I. This is the Basic Part of the Civil Aircraft Inspection Procedures and contains
Leaflets on airworthiness procedures and general aeronautical engineering practices.
All Leaflet numbers in the Basic Part are prefixed by the letters 'BL'. This Part may
be used without a:q.y reference to Part ll.
(b) Part II. This Pa'rt contains Leaflets on technical matters connected with aircraft,
. aircraft systems and· equipment, engines, propellers and radio.. The Leaflets are
grouped into sub-sections and each Leaflet number is prefixed by letters according to
its particular sub-section. Part II is dependent on Part I for information on administra
tive procedures and basic engineering practices and references are made in Part II
Leaflets to Part I subject matter.
2.1 As a result of the division of CAIP into two Parts, Leaflets which have been re
positioned do not follow the sequence of letters and numbers of the Section as listed, and
in some cases the titles of Leaflets do not agree with those printed in the Lists of Leaflets.
The information in the right hand columns of the Lists gives the actual letters/numbers
printed on the Leaflets. The new letters/numbers, and titles where applicable, ·w ill be
printed on the next issues of the particular Leaflets.
NOTE; Reference to. the List of Leaflets.should be made in every case for information on the number
and title of a Leaflet and its position in the volume.
I
AMENDMENTS Leaflets are reviewed periodically to eJ}sure that the information
3
contained in them remains valid. Leaflets which require amertdment are re-issued under
a raised issue number and marginal lines are used to indicate material differences between
issues. Those Leaflets which are reviewed and found not to require amendment are
retained, and a statement indicating the date of the review is added against the entry in the
appropriate List of Leaflets.
4 PUBLICATION AND DISTRIBUTION Subscribers may hold Part I only or both
Parts I and II. Part II is not issued separately because of the essential cross-references
to procedures in Part I.
4.1 Further copies of CAIP may be obtained from the CAA, Printing and Publication
Services, Greville House, 37 Gratton Road, Cheltenham, Glos. GL50 2BN. Details
of all Airworthiness Publications published by the CAA together with prices, subscrip
tion rates and. the address to which applications should be made, are contained in
. Airworthiness Notice No. 6. Unless other arrangements have been made, a remittance
should accompany the order.
5 ENQUIRIES Any enquiries regarding the technical content of the Leaflets should
be addressed to the Civil Aviation Authority, Airworthiness Division, Brabazon House,
Redhill, Surrey RHl lSQ. In countries other than the United Kingdom, the airworthiness
authority of the country concerned should be approached in all cases where it is recom
mended in the Leaflets that the CAA should be consulted.
6 COPYRIGHT Civil Aircraft Inspection Procedures are copyright and may not be
reproduce<l: without permission of the CAA.
2.