ATPL theory questions

[keith williams]

The author of your question has specified the MRJT1 aircraft and the loading manual, he/she has then failed to apply some of the limits that are specified in the manual for this aircraft. This error has caused him/her to reach the wrong solution.

The full process is detailed below.

First use the info in the question plus the limits in the CAP696 to determine which limits are the most restrictive to each stage of the flight.

PLTOM = 65050 From question
MSTOM = 62800 From CAP 696

Neither of the above limits may be exceeded, so the Regulated Take-Off Mass RLTOM = 62800

PLLM = 54500 From question
MSLM = 54900 From CAP696

Neither of the above limits may be exceeded, so the Regulated Landing Mass RLLM = 54500

Max Structural Taxi Mass MSTM = 63060 taken from CAP696

Maximum Structural Zero Mass MZFM = 51300 taken from CAP 696.

Then use the most restrictive limits and the load values provided in the question to calculate the mass at each stage of the flight. Compare these masses with the limits to determine whether or not the limits have been exceeded.

Start/Taxi Mass
DOM 34900
Plus Taxi fuel 350
Plus Trip fuel 9250
Plus Reserve fuel 1100
Plus Alternate fuel 1000
Plus Traffic Load 18600
Total = 65200 This figure is 2140 greater than the Maximum Structural Taxi mass of 63060 so the traffic load must be reduced by 2140 to 16460 to remain within the MMSTM.

Take-off Mass
DOM 34900
Plus Trip fuel 9250
Plus Reserve fuel 1100
Plus Alternate fuel 1000
Plus Traffic Load 18600
Total = 64850 This figure is 2050 greater than the RLTOM of 62800 so the traffic load must be reduced by 2050 to 16550 to remain within the RLTOM

Landing Mass
DOM 34900
Plus Reserve fuel 1100
Plus Alternate fuel 1000
Plus Traffic Load 18600
Total = 55600 This figure is 1100 greater than the RLLM of 54500, so the traffic load must be reduced by 1100 to 17500 to remain within the RLLM


Zero Fuel Mass
DOM 34900
Plus Traffic Load 18600
Total = 53500 This figure is 2200 greater than the Maximum Zero Fuel Mass of 51300, so the traffic load must be reduced by 2200 to 14600 to remain within the MZFM limit.

None of the above limits may be exceeded, so the most restrictive condition must be applied. This is the removal of 2200 kg of traffic load to remain within the MZFM.