Time = Any appropriate unit of Iife measurement such as hours, cycles, Iandings, ect.

 Time active maintenance The time during which preventive and corrective maintenance work is actually being done on the item.

 Time average trip = The radio between the number of flying hours for a given period and the number of depatures for the same given period.

 Time block = The number of hours incurred by an airplane from the moment it first moves for a flight until it comes to rest at its intended blocks at the next point of Ianding, or returns to its departure point prior to takeoff.

Note: Push-outfrom the gate is considered as partofblockhours.

 Time definite delivery = The range of service performance standards off ered by airfreight carriers which permit the customer to select a specific time frame for de?ivery based on requirementfor service and economy. These service standards provide door-to-door (pickup and delivery) scheduled patterns based on same day, next day, second or third day deiivery needs.

 Time flight = Either:

a) Airborne time, i.e. wheels-off to wheels-on; or b) block time, i.e. chocks-away to chock-under.

Note: FAA Regulations (FAR 1.1) define flight time as block time whereas European regulations (J.A.R. 1.1) define flight time as airborne time. When the term ?Flight time? is used, or values of flighttime are quoted, the definition which applies shali be stated.

 Time ln-hourse Iead = The maximum number of calendar days from request to compietion for an activity that is to be accomplished within an operator?s own faci!ity.

 Time initial provisioning Iead = The maximum number of calendar days quoted by the supplier to cover the period of time from receipt of a customer?s initial provisioning orderto shipment.

 Time joh standard = The time allowed for a given task.

 Time mean maintenance = The statistica! mean of the distribution of scheduled or unscheduled (or both) maintenance times. The summation of the duration of scheduied or unscheduled (or both) maintenance time during a given period divided by the total number of scheduied or unscheduled maintenance actions (or both) during the same time period Is an estimate of Mean Scheduled Maintenance Time (Ms), Mean Unscheduled Maintenance Time (Mu), (or Mean Maintenance Time (M).

 Time Mean Task = A representative task time, equa! fo the summation of fask times required to perform a specific task number of a different time divided by the number ot times performed.

Time operating = The time period during which the equipment is performing its intended function.

 Time reorder Iead = The maximum number of calendar days required by the supplierto coverthe period of time from receipt of a customer?s stock replenishment order fo shipment of a formai replenishmenf quanfity.

 Time target = The time allowed for a given task.

 Time task elapsed The calendar time from the commencement to the completion of a defined task.

 Time total = The operating time an item has accumulated since new.

 Time turnaround = That time neede to repair, service or checout an aircraft for recommitment fo operational service or the total number of caiendar days required to complete a specified task(s) trom receipt of an tiem by the maintenance facility fo availability for issue, shipment or reuse as appropriate.

 Time hetween overhauls (TBO) = The maximum time that an item is permitted fo operate between overhauls.

 Time since installatian (TSI) = Time accumulated since a given item was iast instalied.

 Time since overhaul (TSO) = The time accumuiated since a given item was Iast overhauled.

 TL = Trans Mediterranean Airways Sai.

 TM = LAM - Linhas A?reas de Macambique.

 TN = Ausfralian Airlines.

 TNEL = Totai noise exposure Ievel.

 TOAA = Sfudy Group on take-off Obstacle Accountability Areas.

 TODA = Take-off distance available.

 Ton-Kilometre = Measure of airiine freight capacity.

 Ton MiIe = One od the most commonly used measures of transportation service. In air cargo a ton miie means one ton of cargo fiown one rnile.

 Ton miles capacity = The rpoduct of the assessed capcity of an aircraft (expressed in shorf tons of 2000 pounds) and the number of miles flown on revenue flights (expressed in Great Circie statute miles) over a given period. The equivaient metric term is capacity tonne kilometres.

Ton miles production = A figure calculed by adding capacity

 miles to the equivalent ton miles produced bu non revenue fly

 Tonne (i) = The mass equa! to 1 000 kilograms.

 TORA = Take-off run available.

 ?Tarn-Tape? relay installation = A teletypewriter installai where messages are received and relayed in teletypewriter t form and where all operations of relay are performed as the re of operator intervention.

 Total casi of distrihution = The sum total of all the costs incur in the distribution of goods. The total cost of distribution inclu such items as:

-         Transportation charges;

-         lnventory carrying costs;

-         Warehousing expenses;

-         Packaging;

-         Insurance;

-         Product obsolenscence;

-         Pilferage.

Today?s growing use of automated information systems enabl company to identify each element of cost more accurately more quickly than ever before. The rise of new concepts distribution management in which the selection of a frei transport mode sometimes does not hinge upon direct fre charges alone, but on the total cost of distribution, along ?~ service requirements of marketing and sales. Air freight?s SP facilitates a more rapid turnover of inventory. This means a m rapid return on inventory investiment, the elimination or dra reduction of warehousing costs, the elimination of the risk product obsolenscence, and the avoidance od such cost item~ inventory taxes. Packaging costs are lower because of protection afforded by the aircraft and, increasingly, because of use of containers. The lower incidence of damage and pilferag air freight, as compared with surface modes, reduces insura costs. Usually, butnotalways,thefreightchargesviaa?rfrom p A fo point B may be higher than surface; but saving on the 01 elements in the total cost of distribution often result in a net sa~ via air. See Tradeoffs.

 Total estimated elapsed time For FR flights, the estimated ti required from take-off to arrive over that designated point, defii by reference fo navigation aids, from which it is intended thal instrument approach procedure will be commenced, or, if navigafion aid is associated with the destination aerodrome arrive over the destination aerodrome. For VFR flighfs, estimated time required from take-off to arrive over the destinai aerodrome.

ton Touchdown = The point where the nominai glide path intercepts ?ing. the runway.

Note: Touchdown as defined above is only a datum and is not

necessarily the actual point at which the aircraft will touch the

runway.

 Touchdown zone = The portion of a runway, beyond the threshold,where it is intended landing aeroplanes first contact the runway.

  TP = TAP - Air Portugal

   TR = Transbrasil S.A. Linhas A?reas / Transit (Charges Codes). rred

  TRA = Radar transfer of contro!.
  Trace To locate a shipment lost or believed lost.

 Track = The projection on the earths surface of the path of an aircraft, the direction of which path at any point is usually expressed in degrees from North (True, Magnetic or Grid).

 Track = The condition which exists when the DME interrogator has locked onto replies in response to its own interrogations, and is continuously providing a distance measurement.
        

  Tracking/tracing = A carrier?s system of recording movement
   ntervals of shipments from origin fo destination

  TRAD = Request for
  a) date and flight of arriva!
  b) date of delivery of transfer, or advice thet shipment is
  undelivered.
 

  Trade-off = The procedure of trading a degree of one attribute to gain a degree of another attribute, e.g., a degree of reliability might
           be sacrificed fo obtain a greater degree of performance under
           certain conditions, or a degree of performance might be sacrificed
fo obtain a greater capability for maintenance, or vice versa.

Tradeoffs = Interaction between related activities such as the
offsetting of higher costs in one area with reduced costs or other
benefits in other. In air freight the classic ?Tradeoff? is one of time versus money but there are many others in the total cost of distribution.

 Traffic Conferences = Rate-fixing machinery operated by IATA.

 Traffic Rights = Government controls on the type and frequency of commercia! fiights into or out of its territory.
      

 Transatlantic rates = Apply between points in AIA Area i and
  points in AIA Area 2.