Type training · Boeing 737 Classic B1.1 · ATA 30
Boeing 737 Classic B1.1: Ice and Rain Protection (ATA 30)Type training questions & answers
Wing and cowl anti-ice, probe and window heat, wipers and rain repellent.
- A worked explanation on every question
- Written for the 737-300/400/500 with CFM56-3 engines
- Read in English or 15 other languages
Sample Ice and Rain Protection questions with answers
Three questions from the free preview. Think of your answer first, then open the explanation.
1.Which 737 Classic wing leading edge devices are anti-iced by bleed air?
- A.The leading edge slats
- B.The Krueger flaps, inboard of the engines
- C.All slats and Krueger flaps together
Show answer and explanation
Correct answer: A. The leading edge slats
Wing TAI air is directed through a distribution system to the wing leading edge slats. Ref 737-300/400/500 AMM 30-11-00.
2.What protects the 737 Classic wing leading edge from overheat during ground use of wing anti-ice?
- A.Two 125°C thermal switches
- B.A timer that limits the test to 30 s
- C.The precooler outlet temperature sensor
Show answer and explanation
Correct answer: A. Two 125°C thermal switches
Two thermal switches close the wing TAI shutoff valves if air temperature exceeds 125°C on the ground. Ref 737-300/400/500 AMM 30-11-00.
3.On the ground, what closes the 737 Classic wing anti-ice valves when thrust is increased?
- A.N1 above 60% on either of the two engines
- B.Airspeed above 80 kt during the takeoff roll
- C.Thrust lever angle above about 32°
Show answer and explanation
Correct answer: C. Thrust lever angle above about 32°
The valves close when either thrust lever exceeds about 32° and reopen below 32° if the air is under 125°C. Ref 737-300/400/500 AMM 30-11-00.
Part of the Boeing 737 Classic B1.1 type course
One chapter of the Boeing 737 Classic B1.1 type course question bank, for the 737-300/400/500 with CFM56-3 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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