Aircraft Certification Staff Instruction (ACSI)
CF-82-11R1 DE HAVILLAND
Applies to all de Havilland of Canada Model DHC-7 Aircraft, Serial Numbers 1001 through 1100.
|Compliance is required initially within 200 flight hours from the effective date of this Directive and thereafter at intervals not to exceed 500 flight hours.||
Ref. Para 3.2.3 and 3.2.4
|Cracking of Wing Root Rib strut members, (part number XRC1234) has occurred in service which, if left undetected, could result in catastrophic failure of the wing structure in flight.||UNSAFE DESCRIPTION Ref. para 3.2.5 note simple, single sentence description of the problem.|
|To detect cracked Root Rib Strut members and prevent wing failure accomplish the following:||
Ref. para 3.2.6 note - first sentence
||Gives simple description of what corrective action is trying to accomplish.|
Corrective Action options ref. para 3.2.7
Solid black line in R.H. Margin indicates where this revision differs from previous issue.
Use of Service Bulletin Ref para 3.2.8
||Modifications required ref. para 3.2.10|
|Alternate means of compliance with the requirements of this Directive may be used only if approved by the Director, Airworthiness Branch, Transport Canada Ottawa.||Alternate Means of Compliance ref. para 3.2.12|
|This Directive supersedes the previous issue of this Directive CF-82-11 dated 19 November 1982.||Superseding previous AD (in this case a previous issue) Ref. para 3.2.14|
|This Directive becomes effective 21 June 1985.||Effectivity date ref. para 3.2.15|
|D.J. Doe Director, Airworthiness Branch for Minister of Transport||Signature Ref. para 3.2.16|
|For further information regarding the contents or the interpretation of this Directive, contact your Regional Airworthiness Office, or call directly to M. (Authors Name), Transport Canada, Ottawa. Telephone (613) 990-0707.||Paragraph to advise where assistance is available. ref. para 3.2.17|
TRACKING SHEET: AIRWORTHINESS DIRECTIVES
DOCUMENT NUMBER ____________________________________________________
COORDINATED WITH ( YES / NO / N/A):
SUPPLEMENTAL INFORMATION SHEET ENCLOSED: .......................................( )
|DRAFT REFERRED TO||DATE||INITIALS||REMARKS|
DIVISION CHIEFS ENDORSEMENT
(SIGNATURE & DATE, OR N/A)
COMMENTS FROM INDIVIDUAL SECTIONS ENCLOSED.
FRENCH TRANSLATION VERIFIED BY: _____________________ DATE _________
EXECUTIVE SUMMARY ATTACHED: ....................................................................( )
|FINAL REFERRED TO||DATE||INITIALS||REMARKS|
TO MAIL ROOM ___________________________________________________________
AIRWORTHINESS DIRECTIVE SUMMARY - FORMAT
The AD Summary provides on one page essential information regarding the AD in the following format:
(AD Number + Manufacturer + Model + Problem)
eg. CF-86-14 deHavilland DHC-7 Wing Fuel Leak
This can be summary of the AD text eg "Applies to deHavilland of Canada Model DHC-7 aircraft, serial numbers 16 through 99 which have not had modification XYZ fitted.
This consists of a short description of the problem, specifying the number of occurances and significance of problem.
State when the AD becomes effective. Give a short description as to how the AD has remedied the problem. Describe how AD action will terminate ti.e. with mod incorporation) or if further AD revisions are likely.
AIRWORTHINESS DIRECTIVE DEVELOPMENT
- Date modified: