ARS Aircraft Towing and Pushback Operations 2 — Questions and Answers
Question 1: What is the primary role of wing walkers during an aircraft towing operation?
- To provide additional pushing force on the aircraft wings
- To monitor wingtip clearances and alert the crew to obstacles (Correct answer)
- To communicate directly with ATC during the tow
- To operate the tug brakes from outside the vehicle
Correct answer: To monitor wingtip clearances and alert the crew to obstacles
Wing walkers position themselves at the wingtips to monitor clearances from buildings, other aircraft, and equipment, immediately alerting the tow crew if clearance becomes unsafe.
Question 2: Which type of towing equipment does NOT require a towbar connection to the aircraft nose gear?
- Conventional towbar tug
- Towbarless (TBL) tug (Correct answer)
- Nose gear cradle adapter
- Aircraft tow cart with bar attachment
Correct answer: Towbarless (TBL) tug
A towbarless (TBL) tug cradles and lifts the nose gear directly into the tug's frame, eliminating the towbar and reducing nose gear damage risk.
Question 3: What is the correct immediate action if the nose gear exceeds its published maximum steering angle during towing?
- Continue towing at a reduced speed to avoid disrupting gate flow
- Stop immediately and reposition the tug before continuing (Correct answer)
- Signal the cockpit crew to apply differential braking
- Request additional towing equipment before proceeding
Correct answer: Stop immediately and reposition the tug before continuing
Exceeding the maximum nose gear steering angle can cause structural damage to the gear assembly, so towing must stop immediately and the tug must be repositioned within limits.
Question 4: Which document is the authoritative source for a specific aircraft type's maximum nose gear towing steering angle?
- Airport Authority Operations Manual
- Aircraft Maintenance Manual (AMM) (Correct answer)
- IATA Airport Handling Manual (AHM)
- FAA Advisory Circular AC 150/5210-7
Correct answer: Aircraft Maintenance Manual (AMM)
The Aircraft Maintenance Manual (AMM), published by the aircraft manufacturer, contains all structural limits including maximum nose gear steering angles for safe ground handling.
Question 5: During pushback, when the ground crew transmits the 'CLEAR' signal to the cockpit, what does it confirm?
- The aircraft doors are all closed and locked
- The towbar is disconnected, the ground crew is clear, and the aircraft may proceed (Correct answer)
- ATC has issued departure clearance for the flight
- Engine start has been approved by the ramp supervisor
Correct answer: The towbar is disconnected, the ground crew is clear, and the aircraft may proceed
The CLEAR signal confirms that the towbar is disconnected, all ground crew are clear of the aircraft, and control is transferred to the flight crew to taxi under their own power.
Question 6: Which PPE item is specifically critical for ground crew conducting aircraft towing operations at night?
- Hard hat with chin strap
- High-visibility vest or reflective clothing (Correct answer)
- Anti-fog safety goggles
- Chemical-resistant gloves
Correct answer: High-visibility vest or reflective clothing
High-visibility reflective vests ensure ground crew are seen by tug operators, other vehicle drivers, and cockpit crew in low-light and nighttime conditions.
Question 7: What is the primary function of wheel chocks in aircraft towing and pushback operations?
- To prevent the nose gear from turning beyond its steering limit
- To prevent the aircraft from rolling unintentionally when parked or during staged stops (Correct answer)
- To mark the aircraft's final parking position centerline
- To connect the tug drawbar to the towbar assembly
Correct answer: To prevent the aircraft from rolling unintentionally when parked or during staged stops
Wheel chocks are placed against the main gear tires to block unintended rolling movement, securing the aircraft during parking and any ground operation pause.
ARS Aircraft Towing and Pushback Operations 2
What is the primary role of wing walkers during an aircraft towing operation?