A330/A340 Climb,.Cruise.And.Descent
REV.1.(6.JUN.05)
FCTM Cruise
Selected
Should ATC require a specific cruise speed, or turbulence penetration is required, select the new cruise speed on the FCU. FMS predictions are updated accordingly until reaching either the next step climb or TOD, at which point the programmed.speeds.apply.again..The.FMS.predictions.are.therefore.realistic.
At high altitude, the speed should not be reduced below Green Dot as this may create a situation where it is impossible to maintain speed and/or altitude as the increased.drag.may.exceed.the.available.thrust.
ALTITUDE.CONSIDERATIONS
The.PROG.page.displays:
. REC.MAX.FL . OPT.FL
REC.MAX.FL
REC MAX reflects aircraft performance and does not take into account the cost aspect. Unless there are overriding operational considerations, REC MAX should be.considered.as.the.upper.cruise.limit.
OPT.FL
OPT displayed on the PROG page is the cruise altitude for minimum cost when ECON MACH is flown and should be followed whenever possible. It is important to note that the OPT FL displayed on the PROG page is meaningful only if the wind and temperature profile has been accurately entered. Flying at a level other than.the.OPT.FL.adversely.affects.the.trip.cost.
For each different Mach number, there will be a different OPT FL. Should an FMGS failure occur, the crew should refer to the FCOM to determine the OPT FL..FCOM.charts.are.only.provided.for.two.different.Mach.numbers.
RVSM
At intervals of approximately one hour, cross check the validity of primary altimeters. A minimum of two must agree within +/. 200 ft. Failure to meet RVSM requirements should be notified to ATC and recorded in the Aircraft Maintenance.Log..Vol.2.Pt.2.refers.
Cruise
FCTM REV.1.(6.JUN.05)
LATERAL.NAVIGATION
When approaching each waypoint, visually check track and distance to the next waypoint on the F-PLN page against CFP or enroute chart. It is not necessary to verbalise.this.check..Make.optimum.use.of.MCDU.(FCOM.4.refers).
On aircraft equipped with GPS, a navigation accuracy check is not required as long.as.GPS.PRIMARY.is.available.
Without GPS PRIMARY, navigation accuracy should be monitored, particularly when.any.of.the.following.occurs:
. IRS.only.navigation . The.PROG.page.displays.LOW.accuracy . "NAV.ACCUR.DOWNGRAD".appears
If HIGH ACCURACY is displayed on the PROG page, the FM accuracy meets the required criteria. Nevertheless, perform a check periodically when navigation aids are available to allow any FM position error to be quantified against the raw data.on.the.ND..There.are.two.methods.of.performing.an.accuracy.check:
.
On the RAD NAV page, manually tune a VOR/DME to a station that is within range and select the associated needle on the ND. Check that the needle (which is raw data) overlies the corresponding blue navaid symbol (which is FM computed) and that the DME distance is equal to the distance showing between the aircraft symbol and the navaid symbol on the.ND.
.
Insert a VOR/DME ident in BRG/DIST TO field on the PROG page and compare.the.FM.computed.BRG/DIST.with.the.raw.data.on.the.ND.
When operating on routes with Required Navigation Performance (RNP), ensure that the ESTIMATED navigation accuracy indicated on the PROG page is better than.the.RNP.value.for.the.route.
5.20.6
A330/A340 Climb,.Cruise.And.Descent
REV.1.(6.JUN.05)
FCTM Cruise
VERTICAL.NAVIGATION Step.Climb
Since the optimum altitude increases as fuel is consumed during the flight, from a cost point of view, it is preferable to climb to a higher cruise altitude every few hours. This technique, referred to as a Step Climb, is typically accomplished by initially climbing approximately 2000 ft above the optimum altitude and then cruising at that flight level until approximately 2000 ft below the new optimum altitude. In RVSM airspace, it is possible to bracket the optimum altitude by 1000 ft.
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