CONTENT 2 What are T-values? Computation of T- values 2
WHAT ARE T-VALUES? 3
T-values are the required inputs to FORAS system FORAS Ex 2 They are obtained from operational databases (called D-Values) by directly using or deriving from the data TC5 (Airport Recency) is computed based on the following two D-values : Date of this flight When did the pilot visit this airport last time 4
Retrieve directly from the operational databases Computation based on D-values Artificial conversion of the original data 5
Computation of T-VALUES 6
37 related to Crew } 7 related to Sector related to Aircraft 55 in total 7
Experience level is determined based on seniority at rank. Experience Level Captain SFO First Officer Level < 3 years < 2 years < 4 years Level 2 3 years and < 5 years 2 years and < 4 years 4 years and < 6 years Level 3 5 years 4 years 6 years 8
2.8 4.6 6.4 8.2 RATING new moderate experienced Let n = crew size Let h = number of L3 pilots in the crew. Let m = number of L2 pilots in the crew. Let l = number of L pilots in the crew. Let v = 3 h +2 m +l TC = ((v - n)/2n 9) + 9
Effectiveness of crew composition by rank. Greater rating implies greater effectiveness. Size2 Crew Combination Composition Table Rating 3 Crew CCT3 Captain, FO 4 Captain, SFO 4 Captain, Captain 2 Size3 Combination Rating Captain, SFO, FO 4 Captain, SFO, SFO 4 Captain, Captain, FO 3 Captain, Captain, SFO 3 Captain, Captain, Captain 2 Captain, FO, FO 3 Size4 Combination Rating Captain, SFO, FO, FO 4 Captain, SFO, SFO, FO 4 Captain, SFO, SFO, SFO 4 Captain, Captain, SFO, FO 3 Captain, Captain, FO, FO 3 Captain, Captain, SFO, SFO 3 Captain, Captain, Captain, SFO 2 Captain, Captain, Captain, FO 2 Captain, Captain, Captain, Captain
Rating poor mid ideal 4 3.4 2.7.4 2 3 4 5 RATING poor mid ideal
Determined as the minimum proficiency score among the entire cockpit crew. Rating = min {proficiency scores among crew} 4 5 6 basic moderate good RATING 2
The number of visits by the pilot to the arrival airport in the past 2 months. 3 6 9 2 low moderate high TIMES / ONE YEAR 3
The number of flying hours on this craft type 2 3 4 low moderate high HOURS 4
Accumulated flying hours after joining Eva 2 3 4 5 6 low moderate high HOURS 5
The number of landings as PF in this fleet. 5 5 2 low moderate high SECTORS 6
The number of sectors have been completed on this duty day. 2 low moderate high SECTORS 7
The number of duty hours (since reporting) already in this duty day at time of departure 2 4 6 8 2 low moderate high HOURS 8
The number of hours of pre-flight rest over the legal MRR of the pilot. 2 4 6 8 minimal optimal HOURS 9
Pilot s even share of available rest time (flight time minus.5 hours). 2 4 6 minimal adequate HOURS 2
The number of duty hours in this flight. For example, a pilot is scheduled to operate 2 sectors, TPE to BKK and BKK to AMS for this duty. The duty hours of the flight from TPE to BKK should include flight time and briefing time in TPE, and the duty hours of the flight from BKK to AMS should include flight time and transit time in BKK. low high 6 2 8 HOURS 2
Sum (schedule changes of the fleet) / The number of pilots in this fleet. 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 stable moderate unstable U 22
The number of days since the recent extended rest. recent 5 5 2 notrecent DAYS 23
The number of hours that a pilot has flown in the previous 7 days. light 2 moderate 24 severe 28 32 36 HOURS 24
The number of hours that a pilot has flown in the previous 3 days. light 45 moderate 55 severe 65 HOURS 75 85 95 25
This is the number of actual geographic time zones crossed in the previous 7 days. TPE to JFK has 2 time zones crossed. TPE to JFK and back to TPE has 24 geographic time zones crossed. 5 5 2 ZONES light moderate severe 26
Exemplary Schedule Date Duty Sectors Date Duty Sectors S 698 ANC-DFW 6M LO LAX- LO DFW- 7T LO LAX- 2M 67 DFW-ATL 8W 69 LAX- LO ATL- 9T 69 LAX- 3T LO ATL- 2F 69 -TPE 4W LO ATL- 2S 668 TPE-ANC 5T 667 ATL-ANC LO ANC- LO ANC- 22S 667 ANC- 6F 66 ANC- 23M 667 -KIX 7S 66 ANC- 667 KIX-TPE 8S 66 -TPE 24T CRI TPE- 27 TPE-MNL 25W DO - 9M BDO - 26T MON TPE- T BDO - 698 TPE-ANC W BDO - LO ANC- 272 MNL-TPE 697 ANC- 2T IOI TPE- 27F 697 -TPE 3F 67 TPE-BKK 28S BDO - LO BKK- 29S BDO - 4S 632 BKK-TPE 3M BDO - 5S 62 TPE-ANC 3T BDO - 62 ANC-LAX LO LAX- GTZ#=3 GTZ#= GTZ#= SUM=3 AVG = 3/3 = MAX = 3 27
This is an average of actual geographic time zones crossed per sectors flown in the previous 7 days. TPE to JFK has 2 time zones crossed. The average time zones crossed from TPE to JFK and back to TPE is 2..5 3 4.5 6 light moderate severe ZONES 28
This is the maximum of Geographic time zones crossed in any sector flown in the previous 7 days..5 3 4.5 6 ZONES light moderate severe 29
.5 2 2.5 3 not good good U 3
2 3 4 5 6 not fluent fluent U 3
2 3 4 U low moderate high Use the arrival airport and runway as identifiers Look up RWT table Factors affect complexity Crossed runways Parallel runway number (e.g. ATLANTA has 4 parallel runways) 32
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A particular arrival area has a convective weather season The scheduled arrival date and time (actual time, if available) occurs during that season.5 not significant significant U 34
Cross wind, which is calculated by wind direction, wind speed, and wind gusts at arrival airport at arrival time, is measured by knots. 5 2 KNOTS 25 3 35 low moderate high 35
Ambient light at arrival airport at arrival time. Based on the time of sunrise and sunset. Twilight is defined as sunrise and sunset times ±3 minutes..5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 light twilight dark U 36
Ceiling height conditions at arrival airport at arrival time. The rating is the difference from the minimum. 2 3 4 5 6 FEET near minima good 37
Visibility conditions at arrival airport at arrival time. The rating is the difference from the minimum (6 ft.). 4 8 2 6 near minima moderate good METER 38
If there is precipitation at the time of arrival, it is of type none, rain, or snow..5.5 2 2.5 3 3.5 4 none rain snow PRECIP 39
degree Determine the flying complexity of the approach ILS availability no.5 u yes 4
A higher go-around rate implies a greater flying complexity of the sector. Airport, approach, and fleet as identifiers in the look-up table. low..2.3.4.5.6.7.8.9 high VALUE 4
degree Are there significant terrain issues at the approach at arrival airport? The values : -> not significant, -> significant, (default is ).5 not significant significant u 42
degree When there is heavy rain at landing, arrival airport with grooved runways is considered to yield better braking action. Yes.5 No u 43
TA = Sum (Non_weather_MEL_arr_score + if rain then Sum(weaher_MEL_Arr_score)) 2 3 4 5 6 7 8 9 2 low moderate high SCORE 44
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