Type training · Boeing 757 B1.1 · ATA 29
Boeing 757 B1.1: Hydraulic Power (ATA 29)Type training questions & answers
Left, center and right systems, engine and AC motor pumps, PTU, RAT, reservoirs and indication.
- A worked explanation on every question
- Written for the 757-200 with Rolls-Royce RB211-535E4 engines
- Read in English or 15 other languages
Sample Hydraulic Power questions with answers
Three questions from the free preview. Think of your answer first, then open the explanation.
1.How many independent hydraulic systems does the Boeing 757 have, and at what nominal pressure?
- A.Two systems at 3000 psi
- B.Three systems at 3000 psi
- C.Three systems at 5000 psi
Show answer and explanation
Correct answer: B. Three systems at 3000 psi
The 757 has three independent 3000 psi systems (left, centre and right) that power the flight controls, landing gear and thrust reversers.
2.Which fluid is used in the Boeing 757 hydraulic systems?
- A.BMS 3-11 Type IV synthetic fluid
- B.MIL-H-5606 mineral-based fluid
- C.MIL-H-83282 hydrocarbon fluid
Show answer and explanation
Correct answer: A. BMS 3-11 Type IV synthetic fluid
The systems use synthetic BMS 3-11 Type IV (phosphate ester) fluid, and servicing must be done only with BMS 3-11 type fluid.
3.What colour code identifies the tubing and components of the centre hydraulic system?
- A.Red
- B.Blue
- C.Green
Show answer and explanation
Correct answer: B. Blue
The left system is coded red, the centre system blue and the right system green.
Part of the Boeing 757 B1.1 type course
One chapter of the Boeing 757 B1.1 type course question bank, for the 757-200 with Rolls-Royce RB211-535E4 engines, written in our own words for revision. Your type course and the aircraft maintenance manual stay the authority: limits and procedures can differ between airframes and operators.
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