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􀀴 MEL : If the defect is deferred using the Emirates Minimum
Equipment List (MEL), the reference is to be quoted in the block provided.
􀀴 DD CAT (BOEING ONLY) : The category (P, C, E, M, R, L, N) of defect is taken from
the MEL must be entered in this block. See Deferring of Defects (P 11) in this
document.
􀀴 ATA CHAPTER : The maintenance crew will enter the ATA chapter
reference to four digits in the block provided. Servicing and other routine
items such as Water Checks, Fuel Transfer, Landing Gear Pin removal etc., require ATA 1200 to be
entered. An ATA index reference page is inserted in the Aircraft Technical Log (P 5).
􀀴 MM (BOEING ONLY) : The maintenance crew will enter the most
appropriate Maintenance Message (MM) given by the Maintenance
Access Terminal (MAT).
􀀴 ENGINE : When the defect concerns the engine or related systems (ATA
Chapters 71-80) the engine position number is to be entered. If more than one
engine affected, the letter “A” will be entered. For an APU defect, a “0” (Zero) will be
used.
􀀴 Only appropriately authorised staff may issue a Certificate
of Release to Service. The person(s) must sign, enter his
authorisation number and the date. The CRS statement is
reproduced below the clearance blocks. There are certain
circumstances where non-authorised personnel can sign
the CRS – see the summary at the end of this document.
􀀴 MAN HOURS : Total man hours taken in accompanying the
“Action Taken” should be annotated in this block by the
LAE signing the CRS. For example – “Panel Replacement
(Wing)” takes one LAE and two Mechanics 2 hours to complete – this
would be 6 man hours. Man hours applies for the Technical, Cabin and IFE
Log Books.
􀀴 When components are used in defect rectification the component change details will be entered at the
bottom of the page. It is required to enter defect ITEM NUMBER (in DEFECT ITEM), SERIAL NUMBERS off and
on, PART NUMBERS off and on and the stores EK GRN number. The ITEM NUMBER will be the same as the
defect ITEM NUMBER for which the component is related to.
B777 Aircraft Technical Log. Page 11 of 19
Locator : C:\Documents And Settings\Administrator\My Documents\Emirates\777\Notes\Tech Log\B777 Tech Log.Doc As At : 29.11.2001
8. Deferring of Defects.
If a defect cannot be cleared for some reason and it is considered acceptable to continue the aircraft in
service, details of the defect in its entirety must be transferred to the Deferred Defect Record pages held at the
rear of the Technical Log.
There are four types of deferred defects :
• Line Deferred Defects (DD’s).
• Base Deferred Defects (BDD’s).
• Cabin Deferred Defects (P 15).
• IFE Deferred Defects (P 17).
8.1. Line Deferred Defects.
Line Deferred Defects are those defects which occur during normal line maintenance operations of the
aircraft, that cannot be corrected prior to the next aircraft dispatch. DD’s are entered on the Green Line
Deferred Defect Record, towards the rear of the Aircraft Technical Log.
The DD Type is established from the following list :
• P : Defects deferred using the Emirates MEL which have Performance/Penalty or ETOPS
restrictions. These restrictions are identified in the remarks column of the MEL.
• C : Defects concerning the passenger cabin.
• E : Entertainment.
• M : Defects which are deferred using the Emirates MEL which have no Performance/Penalty.
• R : Repeat inspection, or QA concession.
• L : To be used when a Loan/Penalty Pool item is installed.
• N : To be used for any other non-airworthiness defects not covered by the above codes.
Note : If the DD type code P or M is used, MEL reference must also be provided and vice versa.
If a defect is deferred per the MEL, the only acceptable codes are P or M.
8.2. Base Deferred Defects.
Base Deferred Defects are not normally apparent during line operations of the aircraft, e.g. minor
corrosion deferred to next base check etc. BDD’s are entered on the Yellow Base Deferred Defect Record.
BDD’s are used to record defects discovered during Weekly / A Checks / C Check inspections - BDD’s
will not be raised by outstation maintenance staff.
Page 12 of 19 B777 Aircraft Technical Log.
As At : 29.11.2001 Locator : C:\Documents And Settings\Administrator\My Documents\Emirates\777\Notes\Tech Log\B777 Tech Log.Doc
9. Action of Deferred Defects.
When a Deferred Defect (DD) is to be actioned, the full DD text is entered in its entirety as the next
defect ITEM on the Sector Record page and actioned accordingly.
　
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