A320 Family performance retention and fuel savings(24)

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Each of the effects presented in this document are described in the context of the A320. For the A318, A319 and A321 the factors in the adjacent table should be applied to the additional fuel used and additional fuel cost figures shown.
3.2.5.3.2. Flight Controls
Correct rigging of all flight control surfaces is important to aerodynamic efficiency, however, of particular importance are the slats on the wing leading edge and the spoilers on the upper surface. These flight controls are only occasionally deployed during the flight, but are fitted to areas of the wing that are particularly sensitive to imperfections. Such imperfections occur when a slat or spoiler is not flush with the wing profile. The effect on aircraft performance varies with the size of the gap or “mis-rig”. To illustrate this, the effect of a slat or spoiler mis-rigged either by 5, 10 and 15 millimetres is presented for each mission profile.
$12,000
$10,000
$8,000
$6,000
$4,000
$2,000
$0

*Figures represent additional fuel burn and cost for an A320 aircraft. For A318, A319 and A321 the factors shown in the table above should be applied.
Figure 3-16
Slat mis-rig of 5,10 and 15 mm (A320* - fixed fuel price)

Monthly Additional Fuel Cost (US$)
$12,000 $10,000 $8,000 $6,000 $4,000 $2,000 $0

References: Slat Mis-rig
MPD Task Reference: ZL-500-02-1
MPD Task Interval:  C-check (every 20 months or 6000 flight hours) 
Estimated inspection time (all slats):  40 minutes plus access time 
Estimated rigging time for one slat:  4 man-hours 

AMM Reference: 27-84-63/64/65/66/67 PB401
Figure 3-17 Slat mis-rig of 10 mm (A320* - variable fuel price)
$12,000
$10,000 $8,000 $6,000 $4,000 $2,000
$0 *Figures represent additional fuel burn and cost for an A320 aircraft. For A318, A319 and A321 the factors shown on page 33 should be applied.

Figure 3-18 Spoiler mis – rig of 5, 10 and 15 mm (A320* fixed fuel price)
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$1.50 $1.70 $1.90 $2.10 $2.30 $2.50
Fuel Price (US$ per US Gallon)
References: Spoiler Mis-rig
MPD Task Reference:  276400-02-1 
MPD Task Interval:  18000 flight hours 
Estimated inspection time (all spoilers):  3 hours plus access time 
Estimated rigging time for one spoiler:  8 man-hours 
AMM Reference:  27-64-00 PB501 

Figure 3-19
Spoiler mis – rig of 10 mm (A320* variable fuel price)

Example:  one spoiler mis-rigged by 10mm and with fuel at US$2.00 per US gallon
A320:
. Additional fuel per month: between about US$2,000 and US$3,900
(depending on mission).   A318 (applying factors shown in table at top of page 33):
. Additional fuel per month: between about US$1,480 and US$2,850
(depending on mission).   For both types around 11 man-hours would be required to inspect all spoilers and repair one (labour costs around US$900 to US$1,600). The standard inspection interval is every 60 months.
　
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