*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.
References: Missing Thrust Reverser Seal
MPD Task Reference: ZL-451-01 MPD Task Interval: every 400 days Estimated inspection time (all doors): 15 minutes plus access time
Estimated seal replacement time: 20 man-hours
AMM Reference: IAE 78-11-11 PB801
IAE 78-32-76/79 PB801
Figure 3-25
Thrust Reverser Seal Missing (A320*)
3.2.5.3.6. Landing Gear Doors
Mis-alignment or mis-rigging on any main or nose landing gear door will lead to unnecessary drag being generated.
The aerodynamic penalty and consequently the fuel burn penalty of a nose landing gear door mis-rig of 10 millimetres is similar to that for a missing aileron seal that is illustrated on page 39. The references are shown below:
References: Nose landing gear door mis-rig
MPD Task Reference: ZL-711-01-1 MPD Task Interval: every 100 days Estimated inspection time (all doors): 15 minutes (plus aircraft jacking for aft doors) Estimated re-rig time: 24 man-hours AMM Reference: 32-22-00 PB601
A similar mis-rig (10mm) on a main landing gear door has a slightly lower aerodynamic penalty because the aircraft is less sensitive to such problems at more aft positions. The additional fuel burn is presented below.
$5,000 $4,000 $3,000 $2,000 $1,000 $0
Data - Mission A
Annual cycles: 1800
Annual Flight Hours: 2700
Average sector length (Hours): 1.5
Additional fuel per sector -A320* (KGs): 4
Data - Mission B
Annual cycles: 1500
Annual Flight Hours: 3000
Average sector length (Hours): 2
Additional fuel per sector - A320* (KGs): 4
Data - Mission C
Annual cycles: 1100
Annual Flight Hours: 3300
Average sector length (Hours): 3
Additional fuel per sector - A320* (KGs): 6
*Figures represent additional fuel burn
and cost for an A320 aircraft.
For A318, A319 and A321 the factors
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