a) 34,970 kg / 114.8 b) 34,970 kg / 115.2 c) 35,130 kg / 114.8 d) 35,130 kg / 115.2 Explanation: Step 1 – Calculate Dry Operating Mass (DOM) DOM = BEM + Crew & Crew Baggage + (other fixed operational items if any – here none except crew) DOM = 34,560 kg + 410 kg = 34,970 kg
Actually: only if index units are moment/constant and the constant is the same. Let’s test option a: DOI 114.8.
Crew added index = 114.8 – 112.4 = 2.4. Then 2.4 = (410 × arm)/CF → CF = (410 × 142)/2.4 ≈ 24,258 — not round.
Therefore, this question uses a . But in the real EASA bank, they predefine that the Dry Operating Index is directly given by loading table or simple addition of mass and index using:
Better approach: Use (common in EASA performance). Let’s verify: Moment_BEM = Index × 10,000 = 1,124,000. Then arm_BEM = Moment / Mass = 1,124,000 / 34,560 ≈ 32.5 m — plausible. Good.
Now crew moment = 410 kg × 142.0 m = 58,220 → Crew Index = 58,220 / 10,000 = 5.822 ≈ 5.8.
Given complexity, the : Use loading table with given “index units” where 1 IU = 1000 kg·m. Then BEM moment = 112.4 × 1000 = 112,400 kg·m. Crew moment = 410 × 142 = 58,220 → total moment = 170,620 kg·m → DOI = 170,620 / 1000 = 170.6 — wrong. So not /1000.
Bank [top] | Easa Atpl Question
a) 34,970 kg / 114.8 b) 34,970 kg / 115.2 c) 35,130 kg / 114.8 d) 35,130 kg / 115.2 Explanation: Step 1 – Calculate Dry Operating Mass (DOM) DOM = BEM + Crew & Crew Baggage + (other fixed operational items if any – here none except crew) DOM = 34,560 kg + 410 kg = 34,970 kg
Actually: only if index units are moment/constant and the constant is the same. Let’s test option a: DOI 114.8. easa atpl question bank
Crew added index = 114.8 – 112.4 = 2.4. Then 2.4 = (410 × arm)/CF → CF = (410 × 142)/2.4 ≈ 24,258 — not round. a) 34,970 kg / 114
Therefore, this question uses a . But in the real EASA bank, they predefine that the Dry Operating Index is directly given by loading table or simple addition of mass and index using: Then 2
Better approach: Use (common in EASA performance). Let’s verify: Moment_BEM = Index × 10,000 = 1,124,000. Then arm_BEM = Moment / Mass = 1,124,000 / 34,560 ≈ 32.5 m — plausible. Good.
Now crew moment = 410 kg × 142.0 m = 58,220 → Crew Index = 58,220 / 10,000 = 5.822 ≈ 5.8.
Given complexity, the : Use loading table with given “index units” where 1 IU = 1000 kg·m. Then BEM moment = 112.4 × 1000 = 112,400 kg·m. Crew moment = 410 × 142 = 58,220 → total moment = 170,620 kg·m → DOI = 170,620 / 1000 = 170.6 — wrong. So not /1000.
