A320 Family performance retention and fuel savings(20)

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The Configuration Deviation List (CDL) in chapter 6 of the Flight Manual (FM) also allows the aircraft to be dispatched with specified components not fitted. All components must be re-installed at the earliest maintenance opportunity (nominally within 1 week, subject to local airworthiness authority approval).
For items whose loss or failure will bring a fuel consumption penalty it is beneficial to make special efforts to replace them as soon as possible.
The tables on the following page indicate the
Data - Mission A
MMEL and CDL items that will have a noticeable Annual cycles: 1800 negative impact on fuel cost.  They indicate the Annual Flight Hours: 2700 penalty for typical sector lengths and also the Average sector length (Hours): 1.5 cost of the additional fuel (calculated at a fixed Data - Mission B

Annual cycles: 1500
price of US$2.00 per US Gallon) that would be
Annual Flight Hours: 3000
burned during the nominal period allowed for
Average sector length (Hours):
repairs (10 days for MMEL item and 1 week for a
Data - Mission C
CDL item). The typical missions, used
Annual cycles: 1100
throughout this document, are defined in the
Annual Flight Hours: 3300
adjacent table.
Average sector length (Hours): 3

System/ Component  MMEL Condition  Additional fuel required per sector - Kilograms (Cost of additional fuel over 10 days - at US$2.00 / US gallon) 
Mission A (1.5 hours)  Mission B (2 hours)  Mission C (3 hours) 
AC Main generation unavailable (IDG, GCU, line contactor) MMEL 24-10-01  . APU operating throughout flight (max. flight level limited to 33500 feet) . 10 days to repair +     a 10 day extension*  168 KGs (US$5,500)  246 KGs (US$6,800)  253 KGs (US$5,100) 
Engine Anti-Ice Valve failed in open position  MMEL 30-21-01  . 10 days to repair +     a 10 day extension*  72 to 144 KGs (depending on engine type) (US$2,400 to US$4,750)  94 to 189 KGs (depending on engine type (US$2,600 to US$5,200)  140 to 281 KGs (depending on engine type (US$2,850 to US$5,700) 
Right-hand Wing Anti-Ice Valve failed in open position MMEL 30-11-01  . 10 days to repair +     a 10 day extension* . Left-hand Wing Anti-ice Valve failed in open position is NO-GO  47 KGs (US$1,550)  61 KGs (US$1,600)  91 KGs (US$1,850) 
Landing Light failed in extended position MMEL 33-40-02  . 10 days to repair +     a 10 day extension*  36 KGs (US$1,200)  47 KGs (US$1,300)  70 KGs (US$1,400) 

*As per the JAR-MMEL/MEL (subject to the approval of the National Aviation Authority)
Figure 3-13
Additional fuel used when operating under specific MMEL
(over a 10 day period)

Additional fuel required per sector – Kilograms
　
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